{"title":"Lower Unit \u0026 Gearcase","description":null,"products":[{"product_id":"sierra-18-0021-gear-housing-seal-kit-replaces-yamaha-688-w0001-22-00-fits-c75-c80-c85-c90-90-hp-outboards","title":"Sierra Gear Housing Seal Kit 18-0021, Replaces Yamaha 688-W0001-22-00, Fits C75\/E75\/P75\/C80\/C85\/90\/B90\/C90 Outboards","description":"\u003cp\u003eThe Sierra 18-0021 Gear Housing Seal Kit is a replacement seal set engineered for the lower gear housing of specific Yamaha outboard motors. It replaces the OEM Yamaha part 688-W0001-22-00 and is built to match the fit, form, and function of the original equipment seals it succeeds, making it a direct drop-in choice for a gear housing rebuild or seal replacement job.\u003c\/p\u003e\u003cp\u003eThis kit fits the Yamaha C75 (1994-99), E75 (1995-00), P75 (1996-99), C80 (1997), C85 (1992-96), 90 (1992-02), B90 (1998-99), and C90 (1997-01) outboard models. Because gear housing seals are a wear item exposed to constant water contact and gear lubricant, replacing them at the correct interval, or any time the lower unit is opened up, helps prevent water intrusion into the gear case and lubricant leakage that can lead to bearing and gear damage. The kit is sold under the Sierra brand, a long-established supplier of outboard replacement parts, and is packaged as a complete set so the seals needed for the job are included together rather than sourced individually.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0021\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Gear Housing Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 688-W0001-22-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Yamaha C75 (1994-99), E75 (1995-00), P75 (1996-99), C80 (1997), C85 (1992-96), 90 (1992-02), B90 (1998-99), C90 (1997-01)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.36 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282161132\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYamaha C75 (1994-99)\u003c\/li\u003e\n\u003cli\u003eYamaha E75 (1995-00)\u003c\/li\u003e\n\u003cli\u003eYamaha P75 (1996-99)\u003c\/li\u003e\n\u003cli\u003eYamaha C80 (1997)\u003c\/li\u003e\n\u003cli\u003eYamaha C85 (1992-96)\u003c\/li\u003e\n\u003cli\u003eYamaha 90 (1992-02)\u003c\/li\u003e\n\u003cli\u003eYamaha B90 (1998-99)\u003c\/li\u003e\n\u003cli\u003eYamaha C90 (1997-01)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e688-W0001-22-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0021 Gear Housing Seal Kit fit?\u003c\/strong\u003e The 18-0021 kit fits the Yamaha C75 (1994-99), E75 (1995-00), P75 (1996-99), C80 (1997), C85 (1992-96), 90 (1992-02), B90 (1998-99), and C90 (1997-01) outboard models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does this seal kit replace?\u003c\/strong\u003e It replaces Yamaha OEM part number 688-W0001-22-00, so it is a direct substitute for that original gear housing seal set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0021 an OEM part or an aftermarket replacement?\u003c\/strong\u003e It is an aftermarket replacement kit made to match the fit, form, and function of the original Yamaha 688-W0001-22-00 gear housing seal set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0021 kit weigh?\u003c\/strong\u003e The Sierra 18-0021 Gear Housing Seal Kit weighs 0.36 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this kit work on a Yamaha 90 outboard?\u003c\/strong\u003e Yes, the 18-0021 kit is designed to fit the Yamaha 90 (1992-02) outboard, along with the C75, E75, P75, C80, C85, B90, and C90 models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-0021 kit?\u003c\/strong\u003e The kit includes the gear housing seals needed to service the lower unit of the covered Yamaha outboard models, sold as a Sierra Gear Housing Seal Kit under part number 18-0021.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the gear housing seals be replaced?\u003c\/strong\u003e Gear housing seals like those in the 18-0021 kit should be replaced any time the lower unit is opened for service, or when water intrusion or gear lubricant leakage is suspected.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Yamaha C90 use the same seal kit as the C85?\u003c\/strong\u003e Yes, the Sierra 18-0021 Gear Housing Seal Kit covers both the C85 (1992-96) and the C90 (1997-01), along with several other Yamaha models listed in its fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the UPC for the 18-0021 kit 808282161132?\u003c\/strong\u003e Yes, the Sierra Gear Housing Seal Kit 18-0021 carries UPC 808282161132.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this kit be used on a Yamaha E75 outboard?\u003c\/strong\u003e Yes, the E75 (1995-00) is one of the Yamaha models covered by the Sierra 18-0021 Gear Housing Seal Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat brand makes part number 18-0021?\u003c\/strong\u003e Part number 18-0021 is manufactured by Sierra as a Gear Housing Seal Kit.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988012151003,"sku":"SIE-18-0021","price":54.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0021_lg__44598.1558119184.500.750.jpg?v=1785188101"},{"product_id":"sierra-18-0110-9-shift-housing-gasket-replaces-evinrude-johnson-324670-fits-evinrude-johnson-outboards-pkg-of-2","title":"Sierra Shift Housing Gasket 18-0110-9, Replaces OMC 324670, Pack of 2, Evinrude\/Johnson","description":"\u003cp\u003eThe Sierra 18-0110-9 Shift Housing Gasket is a replacement gasket for the shift housing on Evinrude\/Johnson outboard motors, sold as a pack of 2. It is built to meet or exceed the fit, form, and function of the original equipment part it replaces, sealing the shift housing to prevent water intrusion and lubricant loss at this joint. Because a worn or damaged shift housing gasket can allow water to enter the gearcase or let gear lubricant leak out, replacing it during a shift housing service, lower unit rebuild, or when a leak is found at this location helps protect the shift mechanism and gearcase from corrosion and lubrication loss.\u003c\/p\u003e\u003cp\u003eEach gasket is manufactured to the same specification as OMC part number 324670, so it installs as a direct replacement without modification. Selling two gaskets per package means a spare is on hand for a future service, or two units can be used across two repairs, reducing the chance of a shop trip for a single part.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0110-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Shift Housing Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 gaskets per pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Evinrude\/Johnson outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 324670\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282161309\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Evinrude\/Johnson outboard motors using OMC shift housing gasket part number 324670.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003e324670\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0110-9 Shift Housing Gasket fit?\u003c\/strong\u003e This gasket fits Evinrude\/Johnson outboard motors that use OMC shift housing gasket part number 324670.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-0110-9 the same as OMC part 324670?\u003c\/strong\u003e Yes, the Sierra 18-0110-9 Shift Housing Gasket is a direct cross reference to OMC part number 324670 and installs in its place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of 18-0110-9?\u003c\/strong\u003e The 18-0110-9 is sold as a pack of 2 shift housing gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0110-9 shift housing gasket weigh?\u003c\/strong\u003e Each package of the Sierra 18-0110-9 Shift Housing Gasket weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a shift housing gasket used for?\u003c\/strong\u003e It seals the shift housing on the outboard, and the Sierra 18-0110-9 is designed to prevent water intrusion and lubricant loss at that joint on Evinrude\/Johnson outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the shift housing gasket?\u003c\/strong\u003e Replace the Sierra 18-0110-9 Shift Housing Gasket whenever the shift housing is removed for service or if water or gear lubricant is found leaking at the shift housing joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0110-9 gasket genuine OEM or aftermarket?\u003c\/strong\u003e The 18-0110-9 is a Sierra-manufactured replacement part built to meet or exceed the quality of the original OMC 324670 equipment gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes in the package for part 18-0110-9?\u003c\/strong\u003e The package contains 2 Sierra 18-0110-9 shift housing gaskets and no other hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-0110-9 gasket work with non-Evinrude\/Johnson outboards?\u003c\/strong\u003e The Sierra 18-0110-9 Shift Housing Gasket is specified for Evinrude\/Johnson outboards using OMC part 324670; fitment outside that application is not specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the UPC 808282161309 belong to the 18-0110-9 gasket?\u003c\/strong\u003e Yes, UPC 808282161309 identifies the Sierra 18-0110-9 Shift Housing Gasket, sold as a pack of 2.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988019720411,"sku":"SIE-18-0110-9","price":6.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/91jhSwWX5uL.jpg?v=1784385379"},{"product_id":"sierra-18-02061-bearing-carrier-shim-0-010-brown-replaces-omc-911681-omc-gearcase-drive","title":"Sierra Bearing Carrier Shim 18-02061,.010 inch, Brown","description":"\u003cp\u003eThe Sierra 18-02061 is a.010 inch bearing carrier shim used to set bearing carrier clearance and preload during gearcase and lower unit assembly on marine outdrive and outboard applications. Shims of this type are installed between the bearing carrier and gearcase housing to fine-tune fit, allowing a technician to dial in the correct gear backlash and bearing preload during a rebuild or gearcase service. The shim is color-coded brown to indicate its.010 inch thickness, making it easy to identify and stack with other shim thicknesses to reach the specified clearance.\u003c\/p\u003e\u003cp\u003eBuilt from metal, the shim is manufactured to consistent, precise tolerances so that stacking multiple shims produces a predictable, accurate total thickness. Sierra manufactures this part to meet or exceed the specifications of the original equipment part it replaces, and it is designed as a drop-in service part for OMC gearcase and drive maintenance and rebuild work.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-02061\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Shim, Bearing Carrier,.010, Brown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShim Thickness:\u003c\/strong\u003e 0.010 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Brown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282228569\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-02061 shim used for?\u003c\/strong\u003e The Sierra 18-02061 is a bearing carrier shim used to set bearing preload and clearance in a gearcase during assembly or rebuild of the lower unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thickness is the 18-02061 shim?\u003c\/strong\u003e It is.010 inch thick, and the brown color coding identifies this thickness so it can be distinguished from other shim sizes during a rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is this shim and why does the color matter?\u003c\/strong\u003e This shim is brown, which corresponds to its.010 inch thickness so technicians can quickly grab the correct shim size without measuring each one individually.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-02061 shim made of?\u003c\/strong\u003e The 18-02061 bearing carrier shim is made of metal, machined to a consistent thickness so it stacks predictably with other shims.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many shims come in a package?\u003c\/strong\u003e The 18-02061 is supplied as a single shim (unit count of one), so multiple units should be ordered if a stack of several thicknesses is needed for a rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-02061 shim weigh?\u003c\/strong\u003e It weighs 0.01 pounds, consistent with its small, thin construction as a single bearing carrier shim.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this shim?\u003c\/strong\u003e The Sierra 18-02061 measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-02061 an OEM part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra-manufactured replacement part built to meet or exceed the specifications of the original equipment bearing carrier shim it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to install a bearing carrier shim like the 18-02061?\u003c\/strong\u003e A bearing carrier shim such as the 18-02061 is installed when servicing or rebuilding a gearcase, to correct bearing preload or carrier clearance after reassembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-02061 shim be combined with other shim thicknesses?\u003c\/strong\u003e Yes, the.010 inch 18-02061 shim is designed to be stacked with shims of other thicknesses to reach the exact clearance specification required during a gearcase rebuild.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988058157275,"sku":"SIE-18-02061","price":2.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-02061_lg__96458.1558119779.500.750.jpg?v=1785188027"},{"product_id":"sierra-18-0227-bearing-carrier-shim-0-003-green-replaces-omc-911678-omc-gearcase-drive","title":"Sierra Bearing Carrier Shim.003 Inch Green 18-0227 for OMC Gearcase","description":"\u003cp\u003eThe Sierra 18-0227 is a.003 inch bearing carrier shim, identified by its green color coding, designed for use in gearcase and drive applications. This small precision shim is used to set proper bearing carrier clearance and preload during gearcase assembly or rebuild, helping ensure correct alignment and smooth operation of the drive components it supports. Because bearing carrier shims are supplied in different thicknesses, each is color coded so technicians and boat owners can quickly identify and select the correct thickness for the clearance being set; the 18-0227 is the.003 inch, green-coded option.\u003c\/p\u003e\u003cp\u003eSierra manufactures this shim to meet or exceed the specification of the original equipment part it replaces, making it a reliable choice for gearcase servicing where precise shimming is required. It is sold as a single unit and is compact enough to be stocked alongside other shim thicknesses for use as needed during maintenance.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0227\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Shim, Bearing Carrier,.003, Green\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e.003 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor Coding:\u003c\/strong\u003e Green\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Gearcase and Drive Parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282228545\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat thickness is the Sierra 18-0227 bearing carrier shim?\u003c\/strong\u003e The Sierra 18-0227 bearing carrier shim measures.003 inch thick and is color coded green so it can be identified quickly among other shim thicknesses.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the green color coding used for on this shim?\u003c\/strong\u003e Green indicates the.003 inch thickness of the 18-0227 bearing carrier shim, letting technicians distinguish it at a glance from other shim thicknesses used in the same gearcase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a bearing carrier shim used for?\u003c\/strong\u003e A bearing carrier shim like the 18-0227 is placed within the gearcase to set proper bearing carrier clearance and preload during assembly or rebuild of the drive.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many shims come in one package of part 18-0227?\u003c\/strong\u003e The 18-0227 is sold as a single unit, one shim per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-0227 shim?\u003c\/strong\u003e The 18-0227 bearing carrier shim measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0227 bearing carrier shim weigh?\u003c\/strong\u003e This shim weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0227 shim equivalent to the original equipment part?\u003c\/strong\u003e Sierra states that the 18-0227 shim meets or exceeds the specification of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to select a specific shim thickness for my gearcase rebuild?\u003c\/strong\u003e Yes, bearing carrier shims are supplied in multiple thicknesses, each with its own color code, and the.003 inch thickness needed for a given rebuild determines whether the green 18-0227 or a different thickness is required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of parts does the 18-0227 belong to?\u003c\/strong\u003e The 18-0227 is classified under gearcase and drive parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0227 a genuine Sierra part or aftermarket?\u003c\/strong\u003e The 18-0227 is manufactured by Sierra and backed by the company's standard limited warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988059435227,"sku":"SIE-18-0227","price":5.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0227__72453.1558117887.500.750.jpg?v=1785188430"},{"product_id":"sierra-18-0939-9-upper-gearcase-dipstick-gasket-replaces-omc-315189-pack-of-2","title":"Sierra 18-0939-9 Upper Gearcase Dipstick Gasket - Replaces OMC 315189 - Pack of 2","description":"\u003cp\u003eThe Sierra 18-0939-9 Upper Gearcase Dipstick Gasket is a replacement gasket for the upper gearcase dipstick opening on applicable outboard and sterndrive gearcases, sold as a pack of 2 for stocking spares or servicing multiple units. It is designed to seal the dipstick tube against the gearcase housing, helping prevent gear lubricant from seeping out around the dipstick during normal operation and while checking gearcase oil level. Sierra manufactures this gasket to meet or exceed the quality of the original equipment part it replaces, giving installers a reliable option when performing gearcase service, dipstick replacement, or general lower-unit maintenance. Because the gasket is a wear item that can harden, compress, or tear over time, replacing it whenever the dipstick is removed for service helps maintain a proper seal and avoid oil loss. The 18-0939-9 gasket is interchangeable with OMC part number 315189, making it a straightforward like-for-like replacement for technicians and boat owners who already have the OMC part number from their service manual or parts diagram. Its small size and low weight make it an easy, low-cost addition to a maintenance parts kit alongside other gearcase seals and gaskets.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-0939-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDescription:\u003c\/strong\u003e Upper Gearcase Dipstick Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e Pack of 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282162047\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e OMC 315189\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits applications originally using OMC gearcase gasket part number 315189. Check your dipstick tube gasket location against this part number before ordering.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 315189\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0939-9 gasket fit?\u003c\/strong\u003e The Sierra 18-0939-9 Upper Gearcase Dipstick Gasket is designed as a direct replacement for OMC part number 315189, so it fits any application that originally used that OMC gasket at the upper gearcase dipstick opening.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0939-9 gasket the same as OMC 315189?\u003c\/strong\u003e Yes, Sierra part 18-0939-9 is interchangeable with OMC 315189 and is built to meet or exceed the quality of that original equipment gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a pack?\u003c\/strong\u003e The Sierra 18-0939-9 is sold as a pack of 2 upper gearcase dipstick gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this gasket weigh?\u003c\/strong\u003e Each package of the Sierra 18-0939-9 gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the upper gearcase dipstick gasket?\u003c\/strong\u003e The dipstick gasket should be replaced any time the dipstick is removed for gearcase service, since the Sierra 18-0939-9 gasket can lose its seal after being disturbed or after prolonged use, leading to oil seepage around the dipstick.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-0939-9 is a genuine Sierra International part manufactured to meet or exceed the original equipment specification of OMC 315189, not a generic aftermarket substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0939-9?\u003c\/strong\u003e The UPC for the Sierra 18-0939-9 Upper Gearcase Dipstick Gasket is 808282162047.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e Ordering the Sierra 18-0939-9 gets you a pack of 2 upper gearcase dipstick gaskets; no other hardware or tools are included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this gasket for general gearcase maintenance?\u003c\/strong\u003e Yes, the Sierra 18-0939-9 gasket is commonly used during routine gearcase oil checks and service any time the dipstick is pulled and reinstalled.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra list any other cross-reference numbers for this gasket?\u003c\/strong\u003e The only cross-reference listed for the Sierra 18-0939-9 gasket is OMC part number 315189.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086599899,"sku":"SIE-18-0939-9","price":2.3,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0939_lg__61119.1558120843.500.750.jpg?v=1785188214"},{"product_id":"sierra-18-1236-upper-gearcase-drain-screw-for-omc-cobra-evinrude-v-6-40-50hp-outboards-1989-1997-replaces-omc-336982","title":"Sierra 18-1236 Drain Screw, OEM 309243, for OMC Cobra V-6 40-50 HP Drives (1989-97)","description":"\u003cp\u003eThe Sierra 18-1236 is a gearcase drain screw machined from alloy steel with a machined finish for corrosion resistance and a clean, precise fit. It is designed as a direct equivalent to OMC part 309243, used to seal the drain\/fill port on the lower unit or drive housing during service. The screw uses a flat head with a Torx socket drive and a #6-40 fully-threaded, right-hand Unified National Coarse (UNC) shaft, compatible with a 0.25 inch groove diameter. Its compact 0.39 x 0.39 x 0.39 inch dimensions make it a small, easily overlooked but essential part to have on hand any time the gearcase is drained for an oil change or inspection.\u003c\/p\u003e\u003cp\u003eThis drain screw is intended for OMC Cobra drives and V-6 40-50 HP applications from 1989-97. A dedicated O-ring is used with the 18-1236 drain screw to complete the seal; the O-ring is a separate, individually sold component and is not included with this screw. Each unit is sold as a single drain screw.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 309243\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Style:\u003c\/strong\u003e Flat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive System:\u003c\/strong\u003e Torx\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e #6-40\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Style:\u003c\/strong\u003e Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Coverage:\u003c\/strong\u003e Fully Threaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet Screw Thread Type:\u003c\/strong\u003e Unified National Coarse (UNC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Groove Diameter:\u003c\/strong\u003e 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Pieces:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOMC Cobra drives\u003c\/li\u003e\n\u003cli\u003eV-6 40-50 HP (1989-97)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 309243\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-1236 drain screw fit?\u003c\/strong\u003e The Sierra 18-1236 drain screw is designed for OMC Cobra drives and V-6 40-50 HP applications from 1989-97.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-1236 replace?\u003c\/strong\u003e It is a direct equivalent to OMC part number 309243.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1236 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-1236 is Sierra's own manufacturer part number for this drain screw, not a third-party knockoff.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the drain screw made of?\u003c\/strong\u003e The 18-1236 drain screw is machined from alloy steel with a machined finish for durability and corrosion resistance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size does the 18-1236 use?\u003c\/strong\u003e It has a #6-40 thread that is fully threaded, right-hand, and Unified National Coarse (UNC).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat drive type does the screw head use?\u003c\/strong\u003e The 18-1236 has a flat head with a Torx socket drive.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow big is the Sierra 18-1236 drain screw?\u003c\/strong\u003e It measures 0.39 x 0.39 x 0.39 inches and is compatible with a 0.25 inch groove diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1236 come with an O-ring?\u003c\/strong\u003e No, the O-ring used with the 18-1236 drain screw is sold separately as its own part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1236 drain screw weigh?\u003c\/strong\u003e It weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many drain screws are included per order?\u003c\/strong\u003e Each Sierra 18-1236 order includes a single drain screw.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace this drain screw?\u003c\/strong\u003e The 18-1236 is typically replaced whenever the gearcase oil is drained and the screw or its O-ring shows wear, since a worn seal can allow oil to leak from the drive.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988087386331,"sku":"SIE-18-1236","price":7.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1236_lg__89416.1558119460.500.750.jpg?v=1785188232"},{"product_id":"mercruiser-lower-gear-housing-bearing-repair-kit-mpn-118-1404","title":"Sierra Bearing Repair Kit 18-1404 for Mercruiser Lower Gear Housing","description":"\u003cp\u003eThe Sierra 18-1404 is a bearing repair kit built for the lower gear housing on Mercruiser sterndrive units. It is designed to restore proper bearing function in the lower unit, giving boat owners and marine technicians a straightforward way to address wear in the gear housing without having to source individual bearing components separately. This kit falls under Sierra's Mercruiser lower gear housing bearing category, making it a targeted replacement solution for this specific service point on the outdrive.\u003c\/p\u003e\u003cp\u003eAt 3.94 pounds, this is a substantial kit intended for a full lower unit bearing service. Ordering by the Sierra part number 18-1404 ensures you get the correct kit for this application rather than a generic or mismatched bearing set.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-1404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Bearing Repair Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercruiser Lower Gear Housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.94 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282383831\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-1404 kit used for?\u003c\/strong\u003e It is a bearing repair kit for the lower gear housing on Mercruiser sterndrive units, used to service the bearings in that section of the lower unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1404 bearing repair kit weigh?\u003c\/strong\u003e The Sierra 18-1404 weighs 3.94 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1404 kit specific to Mercruiser lower units?\u003c\/strong\u003e Yes, this Sierra kit is categorized specifically for Mercruiser lower gear housing bearing service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat part number should I reference when ordering this kit?\u003c\/strong\u003e Order using Sierra part number 18-1404 to ensure you receive the correct lower gear housing bearing repair kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-1404 a Sierra brand product?\u003c\/strong\u003e Yes, the 18-1404 bearing repair kit is manufactured under the Sierra brand.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-1404 kit?\u003c\/strong\u003e The UPC for this Sierra bearing repair kit is 808282383831.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1404 kit cover the full lower gear housing or a single bearing?\u003c\/strong\u003e It is sold as a kit, indicating it is intended for a lower gear housing bearing service rather than a single standalone bearing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere on the boat does the 18-1404 kit get installed?\u003c\/strong\u003e This kit services the lower gear housing, which is part of the lower unit on a Mercruiser sterndrive.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988087779547,"sku":"SIE-18-1404","price":152.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1404__42970.1722501545.500.750.jpg?v=1785329151"},{"product_id":"sierra-18-2003-oil-seal-replaces-mercury-26-64893-mercruiser-upper-gear-housing-sterndrive-seal-kit-component","title":"Sierra 18-2003 Oil Seal for MerCruiser Alpha One Upper Gear Housing, Replaces Mercury Marine 26-68493 26-823894","description":"\u003cp\u003eThe Sierra 18-2003 is an upper gear housing oil seal built for MerCruiser stern drive applications, including the Alpha One, Alpha One SS, and Alpha One Gen II family of drives. It is designed to keep gear lube contained within the upper drive housing while sealing out water intrusion, protecting the gear set and bearings from contamination and premature wear. The seal is white in color with a rectangular profile and is a lightweight, single-piece component intended for straightforward replacement during upper gear housing service or seal kit rebuilds.\u003c\/p\u003e\u003cp\u003eThis seal cross-references directly to Mercury Marine OEM part numbers 26-68493 and 26-823894, making it a drop-in equivalent for owners who prefer an aftermarket-priced option without deviating from OEM fit and function. Fitment spans a wide range of MerCruiser drive applications and model years, from early 888\/228\/250\/260 units through Alpha One Gen II (CR) drives. Because a gear housing seal is a wear item exposed to constant lubricant and water contact, replacing it whenever the upper housing is opened for service helps prevent leaks and gear lube contamination.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2003\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Rectangular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.06 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1 seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mercury Marine 26-68493, 26-823894\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser 888 \/ 228 \/ 250 \/ 260, 1977-1982\u003c\/li\u003e\n\u003cli\u003eMerCruiser R, 1983 \u0026amp; up\u003c\/li\u003e\n\u003cli\u003eMerCruiser MR Alpha One, 1984-1990\u003c\/li\u003e\n\u003cli\u003eMerCruiser MR Alpha One (CR), 1984-1990\u003c\/li\u003e\n\u003cli\u003eMerCruiser Alpha One SS, 1986-1989\u003c\/li\u003e\n\u003cli\u003eMerCruiser Alpha One Gen II, 1991-1995\u003c\/li\u003e\n\u003cli\u003eMerCruiser Alpha One Gen II (CR), 1991-1995\u003c\/li\u003e\n\u003cli\u003eMerCruiser Alpha One Gen II, 1996-1997\u003c\/li\u003e\n\u003cli\u003eMerCruiser Alpha One Gen II (CR), 1996-2010\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury Marine 26-68493\u003c\/li\u003e\n\u003cli\u003eMercury Marine 26-823894\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat MerCruiser drives does the Sierra 18-2003 oil seal fit?\u003c\/strong\u003e The Sierra 18-2003 fits MerCruiser 888\/228\/250\/260 drives (1977-1982), MerCruiser R (1983 \u0026amp; up), MR Alpha One and MR Alpha One (CR) drives (1984-1990), Alpha One SS drives (1986-1989), and Alpha One Gen II and Alpha One Gen II (CR) drives (1991-1995, 1996-1997, and 1996-2010).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2003 the same as a Mercury Marine seal?\u003c\/strong\u003e Yes, the Sierra 18-2003 cross-references directly to Mercury Marine OEM oil seals 26-68493 and 26-823894, so it fits and functions the same as the genuine Mercury Marine part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and shape is the 18-2003 seal?\u003c\/strong\u003e It is a white, rectangular-shaped seal designed for the upper gear housing of the specified MerCruiser drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2003 oil seal weigh?\u003c\/strong\u003e This oil seal weighs 0.06 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-2003 oil seal manufactured?\u003c\/strong\u003e The Sierra 18-2003 upper gear housing oil seal is manufactured in Taiwan.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2003 a genuine Mercury Marine part or an aftermarket replacement?\u003c\/strong\u003e It is an aftermarket Sierra-brand oil seal, not a genuine Mercury Marine part, but it cross-references to Mercury Marine 26-68493 and 26-823894 for equivalent fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2003 seal fit the Alpha One Gen II (CR) drive?\u003c\/strong\u003e Yes, the 18-2003 fits Alpha One Gen II (CR) drives for the 1991-1995 and 1996-2010 model years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in a package?\u003c\/strong\u003e The Sierra 18-2003 is packaged as a single oil seal per unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2003 fit the early MerCruiser 888\/228\/250\/260 drives?\u003c\/strong\u003e Yes, this seal fits MerCruiser 888\/228\/250\/260 drives from the 1977-1982 model years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the OEM cross-reference number for the Sierra 18-2003?\u003c\/strong\u003e The Sierra 18-2003 cross-references to Mercury Marine 26-68493 and 26-823894.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2003 fit an Alpha One SS drive?\u003c\/strong\u003e Yes, the Sierra 18-2003 is listed for MerCruiser Alpha One SS drives from the 1986-1989 model years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-2003 seal used for?\u003c\/strong\u003e The 18-2003 is an upper gear housing oil seal used to retain gear lubricant and keep water out of the upper drive housing on the listed MerCruiser applications.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988090269915,"sku":"SIE-18-2003","price":21.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2003_lg__62920.1558121909.500.750.jpg?v=1785188676"},{"product_id":"sierra-18-2011-marine-oil-seal-replaces-mercury-26-90562-mercruiser-lower-gear-housing-water-pump-base-seal","title":"Sierra 18-2011 Oil Seal for MerCruiser 60\/80\/90 Gear Housing (1965-1972), Replaces Mercury Marine 26-90562","description":"\u003cp\u003eThe Sierra 18-2011 is a lower gear housing oil seal built for MerCruiser 60\/80\/90 model stern drives produced from 1965 to 1972. It is a precision-machined replacement seal used during gear housing service, sealing the housing against water intrusion and lubricant loss at the shaft. The seal cross-references directly to Mercury Marine part number 26-90562, making it a straightforward drop-in replacement for boaters and marine technicians rebuilding or servicing the lower unit on this model line.\u003c\/p\u003e\u003cp\u003eThe 18-2011 measures 1.250 inches in outer diameter, has a shaft size of 0.750 inches, and a width of 0.312 inches, with a machined exterior finish. It is a compact, lightweight component at 0.02 pounds, sized to fit within the gear housing seal carrier alongside the other components (such as the O-ring and bearing carrier) used in MerCruiser 60\/80\/90 gear housing seal service.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2011\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MerCruiser Lower Gear Housing Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 1.250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Size:\u003c\/strong\u003e 0.750 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 0.312 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999309570\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMerCruiser 60 \/ 80 \/ 90 model gear housings, 1965-1972\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 26-90562\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2011 oil seal fit?\u003c\/strong\u003e The 18-2011 is designed for MerCruiser 60\/80\/90 model lower gear housings built from 1965 to 1972.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2011 the same as Mercury Marine 26-90562?\u003c\/strong\u003e Yes, the 18-2011 cross-references directly to Mercury Marine part number 26-90562.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this seal?\u003c\/strong\u003e The 18-2011 measures 1.250 inches in outer diameter, 0.750 inch shaft size, and 0.312 inch width.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2011 oil seal weigh?\u003c\/strong\u003e 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the exterior finish on this seal?\u003c\/strong\u003e The Sierra 18-2011 has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Mercury OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-2011 is manufactured by Sierra as an aftermarket seal engineered to the Mercury Marine 26-90562 specification, rather than a Mercury-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2011?\u003c\/strong\u003e 030999309570.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere does this seal fit within the gear housing?\u003c\/strong\u003e In the MerCruiser 60\/80\/90 gear housing seal chart, the 18-2011 is listed as the Seal component alongside the O-ring and bearing carrier used for that model and year range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2011 fit later MerCruiser models like the Alpha One?\u003c\/strong\u003e No, the 18-2011 is listed specifically for the 60\/80\/90 model gear housings covering 1965-1972; later MerCruiser drive lines use different Sierra seal part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size shaft does the 18-2011 seal accept?\u003c\/strong\u003e A 0.750 inch shaft, per the seal's listed shaft size.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with this part?\u003c\/strong\u003e The 18-2011 is sold as a single oil seal, not a full gear housing seal kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-2011 be cross-referenced by its Mercury Marine number?\u003c\/strong\u003e Yes, searching Mercury Marine 26-90562 will return the Sierra 18-2011 as its cross-referenced equivalent.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988090302683,"sku":"SIE-18-2011","price":12.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2011__04532.1722501864.500.750.jpg?v=1785189002"},{"product_id":"sierra-18-2094-marine-oil-seal-replaces-mercruiser-26-88416-26-36143-fits-alpha-one-bravo-i-ii-iii-and-r-mr-470-sterndrives","title":"Sierra 18-2094 Oil Seal, Replaces 30-60794A2, Fits Mercruiser 1, R, MR and Alpha Stern Drives 1974-97","description":"\u003cp\u003eThe Sierra 18-2094 is a greasable oil seal engineered for Mercruiser stern drive units, sold to meet or exceed original equipment quality. It is designed as a direct replacement for the factory seal on Mercruiser 1, R, MR, and Alpha model stern drives built through the 1974-97 range, restoring the seal that keeps water out and lubricating grease in around the drive shaft. Each unit is greasable, allowing fresh grease to be worked into the seal during service to extend its working life and protect against water intrusion at the gimbal\/drive shaft interface.\u003c\/p\u003e\u003cp\u003eThis part is packaged so that one 18-2094 seal and one 18-2100 seal are included together, since Mercruiser stern drive service on these units typically calls for replacing both seals as a set. The white-finished seal cross-references directly to Mercury Marine part numbers 30-60794A2, 30-60794A4, and 30-879194A02, so it drops into the same location as those OEM numbers without modification. It is a straightforward maintenance item for anyone performing gimbal bearing, drive shaft, or U-joint service on a compatible Mercruiser stern drive, and is commonly replaced any time the drive is disassembled for other repair work to ensure a fresh, reliable seal is in place.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2094\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Internal Engine Parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Greasable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Contains one each of 18-2094 and 18-2100\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercruiser 1, R, MR and Alpha stern drives (1974-97)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 30-60794A2, 30-60794A4, 30-879194A02\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.11 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282185206\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser 1, R, MR and Alpha stern drives (1974-97)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e30-60794A2\u003c\/li\u003e\n\u003cli\u003e30-60794A4\u003c\/li\u003e\n\u003cli\u003e30-879194A02\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2094 oil seal fit?\u003c\/strong\u003e The Sierra 18-2094 is designed for Mercruiser 1, R, MR and Alpha model stern drives (1974-97), sealing the drive shaft area to keep water out and grease in.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-2094 replace?\u003c\/strong\u003e It cross-references directly to Mercury Marine numbers 30-60794A2, 30-60794A4, and 30-879194A02, so it installs in place of any of those factory numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2094 come with anything else in the package?\u003c\/strong\u003e Yes, this package contains one each of the 18-2094 and 18-2100 seals, since these two are typically replaced together during stern drive service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2094 seal greasable?\u003c\/strong\u003e Yes, the 18-2094 is a greasable design, meaning fresh grease can be worked into the seal to help maintain its seal against water intrusion over time.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2094 oil seal weigh?\u003c\/strong\u003e The Sierra 18-2094 weighs 0.11 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-2094 seal?\u003c\/strong\u003e The 18-2094 has a white finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2094 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra-manufactured replacement part built to meet or exceed original equipment quality, cross-referenced to Mercury Marine OEM numbers 30-60794A2, 30-60794A4, and 30-879194A02 rather than being sold under the Mercury Marine brand itself.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the 18-2094 seal?\u003c\/strong\u003e This seal is typically replaced whenever a compatible Mercruiser 1, R, MR or Alpha stern drive is disassembled for gimbal, drive shaft, or U-joint service, or when the existing seal shows wear that could let water in.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need special tools to install the 18-2094?\u003c\/strong\u003e Installation follows standard Mercruiser stern drive disassembly and reseal procedures for the 1, R, MR and Alpha model drives that the 18-2094 is designed for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2094 seal sold as a single seal or a pair?\u003c\/strong\u003e The 18-2094 package contains one each of the 18-2094 and 18-2100 seals, so both are included together rather than sold as two separate 18-2094 units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2094?\u003c\/strong\u003e The Sierra 18-2094 oil seal has UPC 808282185206.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988091646171,"sku":"SIE-18-2094","price":21.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__32850.1753840675.500.750.jpg?v=1785188938"},{"product_id":"sierra-18-21005k-seal-gimbal-bearing-kit-for-mercruiser-bravo-alpha-one-gen-ii-1998-up-replaces-30-862540a3","title":"Sierra 18-21005K Seal \u0026 Bearing Kit for Mercruiser Gimbal Bearing","description":"\u003cp\u003eThe Sierra 18-21005K Seal \u0026amp; Bearing Kit is a replacement ball bearing and seal set built for Mercruiser gimbal bearing applications. It is designed as a direct-fit repair kit for boat owners and marine technicians who need to renew a worn or leaking gimbal bearing assembly without hunting down individual components separately. The kit pairs a metal ball bearing with matched seals so the bearing bore stays properly sealed against water intrusion, one of the most common causes of premature gimbal bearing failure on sterndrive boats.\u003c\/p\u003e\u003cp\u003eConstruction is metal for durability in the demanding marine environment, and the bearing is lubricated with grease to reduce friction and wear during operation. Sierra engineers its parts to meet or exceed the specification of the original equipment they replace, and the company supplies OEM engine manufacturers and boat builders with parts on a daily basis, so buyers can expect consistent fit and performance from the 18-21005K kit. Each kit is packaged as a complete, ready-to-install unit containing one bearing and its associated seal components.\u003c\/p\u003e\u003cp\u003eThis kit is intended for gimbal bearing service on Mercruiser sterndrive setups. Installers should confirm the bearing bore and shaft dimensions on their specific gimbal housing match this kit before ordering, as gimbal bearing kits are sized to a particular housing and drive combination.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-21005K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Seal \u0026amp; Bearing Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercruiser Gimbal Bearing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing Type:\u003c\/strong\u003e Ball Bearing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Lubricant:\u003c\/strong\u003e Grease\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 4.5 x 2.75 x 5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.51 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282187309\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e China\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-21005K Seal \u0026amp; Bearing Kit?\u003c\/strong\u003e The Sierra 18-21005K kit includes one ball bearing and its matched seal components, packaged as a single ready-to-install seal and bearing kit for a package quantity of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is this kit used for?\u003c\/strong\u003e The 18-21005K is a seal and bearing kit for Mercruiser gimbal bearing service, replacing the bearing and seals in a gimbal bearing housing on a sterndrive boat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-21005K made from?\u003c\/strong\u003e It is made of metal, with a ball bearing design lubricated with grease for smooth operation in marine use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-21005K Seal \u0026amp; Bearing Kit?\u003c\/strong\u003e The kit measures 4.5 x 2.75 x 5 inches and weighs 1.51 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-21005K a genuine Sierra part or aftermarket?\u003c\/strong\u003e 18-21005K is a Sierra-branded seal and bearing kit engineered to meet or exceed the specification of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of bearing does this kit use?\u003c\/strong\u003e This kit uses a ball bearing, designated bearing number 18-21005K, matched with seals for the gimbal bearing bore.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat lubricant should be used with the 18-21005K bearing?\u003c\/strong\u003e The bearing in the 18-21005K kit is compatible with standard marine grease lubricant.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-21005K manufactured?\u003c\/strong\u003e The country of origin for the 18-21005K Seal \u0026amp; Bearing Kit is China.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many bearings come in one 18-21005K kit?\u003c\/strong\u003e Each 18-21005K kit has a package quantity of 1, containing a single seal and bearing set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-21005K require special tools to install?\u003c\/strong\u003e The kit is a standard press-fit seal and bearing replacement for a gimbal bearing housing; installers should verify bore and shaft dimensions match their gimbal housing before installing the 18-21005K.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988091777243,"sku":"SIE-18-21005K","price":93.31,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-21005K__15377.1737884803.500.750.jpg?v=1785188518"},{"product_id":"sierra-18-2100k-seal-gimbal-bearing-kit-for-mercruiser-1-r-mr-alpha-one-1974-97-replaces-30-60794a2-greasable","title":"Sierra 18-2100K Seal and Bearing Kit for Mercruiser Gimbal Bearing, White","description":"\u003cp\u003eThe Sierra 18-2100K Seal and Bearing Kit is a gimbal bearing service kit designed to restore the seal and bearing components on the drive system, replacing worn or leaking originals with parts built to meet or exceed OEM specifications. This kit is engineered to handle the demands of high horsepower marine engines and the harsh conditions of saltwater and freshwater use, making it a dependable choice for routine maintenance or full seal and bearing replacement. It is finished in white and features a round profile consistent with standard gimbal bearing housings.\u003c\/p\u003e\u003cp\u003eSierra manufactures this kit to the same quality standards it supplies to OEM engine manufacturers and boat builders, so installers can expect a fit and function that matches the original equipment being replaced. The kit ships as a complete set (1 count) so all necessary seal and bearing components are included together, simplifying the service job and reducing the need to source individual pieces separately.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2100K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 count\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.54 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Universal fit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThis kit has a universal fit type; no specific make, horsepower, or model range is specified.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are specified for this kit.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2100K Seal and Bearing Kit used for?\u003c\/strong\u003e It is a seal and bearing kit used to service and restore the gimbal bearing assembly, replacing worn seals and bearings with parts built to meet or exceed the original equipment they replace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2100K fit a specific boat make or engine model?\u003c\/strong\u003e The Sierra 18-2100K is listed with a universal fit type, meaning no single make, horsepower rating, or model range is specified for it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-2100K kit?\u003c\/strong\u003e White is the finish color of the Sierra 18-2100K Seal and Bearing Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many pieces come in the 18-2100K kit?\u003c\/strong\u003e The kit is sold as a single set, listed as a 1 count unit, containing the seal and bearing components together.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2100K weigh?\u003c\/strong\u003e It weighs 1.54 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2100K an OEM part or an aftermarket replacement?\u003c\/strong\u003e It is an aftermarket kit manufactured by Sierra, built to meet or exceed the specifications of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there OEM cross-reference numbers for the 18-2100K?\u003c\/strong\u003e No OEM cross-reference or replaces numbers are specified for the Sierra 18-2100K Seal and Bearing Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the seal and bearing housing in this kit?\u003c\/strong\u003e The Sierra 18-2100K has a round shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-2100K be used in saltwater applications?\u003c\/strong\u003e Yes, the Sierra 18-2100K is built to stand up to the harsh marine environment, including the demands of saltwater use.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat quality standard does Sierra hold this kit to?\u003c\/strong\u003e Sierra engineers the 18-2100K to meet or exceed the original equipment part it replaces, the same standard it applies as a supplier to OEM engine manufacturers and boat builders.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988091842779,"sku":"SIE-18-2100K","price":77.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2100K__63098.1737855155.500.750.jpg?v=1785188055"},{"product_id":"sierra-18-2221-gear-set-for-johnson-evinrude-omc-brp-outboards-replaces-oem-434063-333077-323664-forward-gear-reverse-gear-sliding-clutch","title":"Sierra 18-2221 Gear Set for Johnson\/Evinrude Outboards 112-125 HP","description":"\u003cp\u003eThe Sierra 18-2221 Gear Set is a replacement drive-train gear set built for Johnson\/Evinrude (OMC\/BRP) outboard motors. It is engineered to meet or exceed the quality of the original equipment gear set it replaces, giving boat owners a dependable way to restore proper shifting and power transfer in the lower unit without sourcing increasingly scarce OEM parts. The gear set is manufactured to Sierra's marine-duty standards, which means it is built to hold up to the constant load reversals, saltwater exposure, and heat cycling that outboard drive components see in service.\u003c\/p\u003e\u003cp\u003eThis gear set is designed for use with a specific range of Johnson\/Evinrude outboards spanning 112 HP through 125 HP commercial models, matched to particular years and drive configurations. A companion pinion gear, Sierra 18-1288, is sold separately and is commonly installed alongside this gear set during a lower unit rebuild. Because outboard lower units use closely related gear sets across different horsepower and year combinations, it is important to confirm the exact HP, year, and model before ordering to ensure this is the correct gear set for the application.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2221\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Gear Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Outboard Lower Unit Drive System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Engine Brand:\u003c\/strong\u003e Johnson\/Evinrude (OMC\/BRP)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.85 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999621306\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompanion Pinion (sold separately):\u003c\/strong\u003e Sierra 18-1288\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable With:\u003c\/strong\u003e GLM 22630, Mallory 9-73560\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 112 HP, 1994-96, All models\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 115 HP, 1978-85 and 1990-98, All models\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 115 HP, 1999, 20 inch 60 degree V4\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 120 HP, 1986-92, All models\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 120 HP, 1993-94, TL and TX\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 125 HP Commercial, 1989-90\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 22630\u003c\/li\u003e\n\u003cli\u003eMallory 9-73560\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2221 Gear Set used for?\u003c\/strong\u003e It is a replacement gear set for the lower unit drive system of Johnson\/Evinrude (OMC\/BRP) outboard motors, restoring proper gear engagement and power transfer when the original gears wear out.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboards does the 18-2221 gear set fit?\u003c\/strong\u003e This gear set fits Johnson\/Evinrude outboards including 112 HP (1994-96, all models), 115 HP (1978-85 and 1990-98, all models, and the 1999 20 inch 60 degree V4), 120 HP (1986-92 all models, and 1993-94 TL and TX), and 125 HP Commercial models (1989-90). Confirm your engine's exact HP, year, and model before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2221 equivalent to any other brand's part?\u003c\/strong\u003e Yes, the Sierra 18-2221 Gear Set is interchangeable with GLM 22630 and Mallory 9-73560.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to buy the pinion gear separately?\u003c\/strong\u003e Yes, the companion pinion, Sierra 18-1288, is sold separately from the 18-2221 Gear Set and is typically replaced at the same time during a lower unit rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2221 Gear Set weigh?\u003c\/strong\u003e The Sierra 18-2221 Gear Set weighs 3.85 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2221 an OEM or aftermarket part?\u003c\/strong\u003e It is an aftermarket gear set manufactured by Sierra to meet or exceed the quality of the original equipment gear set it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gear sets come in one order?\u003c\/strong\u003e One Sierra 18-2221 Gear Set is included per unit ordered.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this gear set be used on a 1993-94 120 HP TX model?\u003c\/strong\u003e Yes, the 18-2221 Gear Set is listed for 1993-94 120 HP TL and TX Johnson\/Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this gear set fit a 1999 115 HP outboard?\u003c\/strong\u003e It fits the 1999 115 HP Johnson\/Evinrude with the 20 inch 60 degree V4 configuration; a different gear set (18-2251) is used for the 25 inch transom version of the same year and horsepower.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat should I check before ordering the 18-2221 Gear Set?\u003c\/strong\u003e Match your outboard's exact horsepower, model year, and model designation against the fitment list, since Johnson\/Evinrude outboards use several closely related gear sets across similar horsepower ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2221 Gear Set include the shift clutch?\u003c\/strong\u003e No, the shift clutch is a separate component (listed as 18-2220 or 18-2200 depending on application) from the 18-2221 Gear Set itself.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988105670875,"sku":"SIE-18-2221","price":331.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2221_lg__57137.1558124238.500.750.jpg?v=1785188232"},{"product_id":"carrier-seal-for-mercruiser-stern-drive-replaces-821759a2-sierra-18-2354-wm-118-2354","title":"Sierra 18-2354 Carrier Seal for Mercruiser Stern Drive Forward and Reverse Gears","description":"\u003cp\u003eThe Sierra 18-2354 Carrier Seal is a round marine seal engineered for Mercruiser stern drive forward and reverse gear applications. It is designed to seal against water intrusion and lubricant loss at the gear carrier, helping protect the internal gear set from corrosion and contamination in the harsh marine environment. Sierra builds this seal to meet or exceed the performance of the original equipment part it replaces, and Sierra supplies OEM engine manufacturers and boat builders with parts of the same quality standard used in this seal.\u003c\/p\u003e\u003cp\u003eEach unit is sold individually as a single carrier seal, finished in white with a round profile to match its mounting bore. Its compact, lightweight construction (0.13 pounds) makes it a straightforward, low-cost replacement item to keep on hand for stern drive gear case service.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2354\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Carrier Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercruiser Forward and Reverse Gears\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.13 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 seal per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282243524\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2354 Carrier Seal used for?\u003c\/strong\u003e It is a carrier seal used in Mercruiser stern drive forward and reverse gear applications, sealing the gear carrier to help prevent water intrusion and lubricant loss.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2354 seal round or another shape?\u003c\/strong\u003e The Sierra 18-2354 Carrier Seal has a round shape, matching the round carrier bore it seals in the gear case.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-2354 Carrier Seal?\u003c\/strong\u003e It is white in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2354 Carrier Seal weigh?\u003c\/strong\u003e The seal weighs 0.13 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in one package of the 18-2354?\u003c\/strong\u003e One Sierra 18-2354 Carrier Seal is included per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2354 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e Sierra 18-2354 is an aftermarket part manufactured by Sierra, built to meet or exceed the performance of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra make this carrier seal, or another manufacturer?\u003c\/strong\u003e Yes, the 18-2354 Carrier Seal is manufactured by Sierra, a supplier of parts to OEM engine manufacturers and boat builders.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat gear case application does the 18-2354 carrier seal fit?\u003c\/strong\u003e This seal is categorized for Mercruiser forward and reverse gear applications on stern drive units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-2354 Carrier Seal be used as a routine maintenance replacement part?\u003c\/strong\u003e Yes, at 0.13 pounds and sold individually, the Sierra 18-2354 is a compact replacement seal suited to gear carrier service on Mercruiser stern drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the Sierra 18-2354?\u003c\/strong\u003e The order includes one Sierra 18-2354 Carrier Seal.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988105834715,"sku":"SIE-18-2354","price":29.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2354__65465.1722372607.500.750.jpg?v=1785188314"},{"product_id":"sierra-18-2371-lower-unit-drain-screw-for-yamaha-outboards-replaces-688-45341-m8-1-25-thread","title":"Sierra Drain Screw 18-2371, M8-1.25 Thread, Replaces 688-45341-00-00, Pack of 50","description":"\u003cp\u003eThe Sierra Drain Screw 18-2371 is an M8-1.25 thread drain screw used to seal the drain and fill ports on marine lower units and gearcases. It is sold in a pack of 50, making it a practical stock item for shops, marinas, and service techs who perform routine gear lube changes and need a reliable supply of correctly sized screws on hand. The screw pairs with Sierra Gasket 18-4698, which creates the seal against the housing and should be replaced along with the screw each time the drain or fill plug is removed to prevent gear lube leaks. Installing a proper drain screw with a fresh gasket is a small but critical step in gearcase maintenance, since a worn or damaged sealing surface can allow lubricant to seep out or water to enter the housing, leading to costly internal damage. This part number is intended as a direct equivalent for the OEM numbers listed below, so it can be used as a drop-in replacement when servicing units originally fitted with those screws. Keeping a supply of these screws and matching gaskets on hand simplifies routine maintenance and helps ensure a proper, leak-free seal every time a lower unit is drained or refilled.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2371\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e M8-1.25\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e Pack of 50\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Gasket:\u003c\/strong\u003e Sierra 18-4698\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282185541\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 688-45341-00-00, 688-45341-10-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e688-45341-00-00\u003c\/li\u003e\n\u003cli\u003e688-45341-10-00\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size is the Sierra 18-2371 drain screw?\u003c\/strong\u003e The Sierra 18-2371 drain screw has an M8-1.25 thread.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many screws come in a pack?\u003c\/strong\u003e Sierra 18-2371 is sold in a pack of 50 drain screws.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2371 come with a gasket?\u003c\/strong\u003e No, the screw itself does not include a gasket, but it is designed to use Sierra Gasket 18-4698, which should be installed with it to create a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-2371 replace?\u003c\/strong\u003e The 18-2371 drain screw replaces OEM numbers 688-45341-00-00 and 688-45341-10-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2371 drain screw weigh?\u003c\/strong\u003e Each unit is listed at 0.01 pounds, reflecting the small size of an individual drain screw.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this screw be used for both drain and fill ports?\u003c\/strong\u003e Yes, the Sierra 18-2371 is used as a drain and fill screw on lower unit and gearcase housings that use the M8-1.25 thread and match the listed OEM numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a new gasket required every time the drain screw is removed?\u003c\/strong\u003e It is recommended to replace the gasket, such as Sierra 18-4698, whenever the 18-2371 drain screw is removed to maintain a leak-free seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2371 an OEM or aftermarket part?\u003c\/strong\u003e The 18-2371 is a Sierra-brand replacement part manufactured as an equivalent to OEM numbers 688-45341-00-00 and 688-45341-10-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering this item?\u003c\/strong\u003e Ordering the Sierra 18-2371 provides 50 individual drain screws; the matching gasket, Sierra 18-4698, is a separate part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy buy drain screws in a pack of 50?\u003c\/strong\u003e A pack of 50 Sierra 18-2371 screws is intended for shops and technicians who regularly service lower units and need a ready supply of correctly sized drain and fill screws.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988105965787,"sku":"SIE-18-2371","price":9.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2371__28318.1558324186.500.750.jpg?v=1785329156"},{"product_id":"sierra-18-2378-magnetic-drain-fill-screw-lower-gearcase-plug-for-evinrude-outboards-replaces-omc-311598","title":"Sierra Magnetic Drain Screw 18-2378, Replaces 309243, for Cobra Drives \u0026 V-6 40-50HP (1989-97)","description":"\u003cp\u003eThe Sierra 18-2378 is a magnetic drain screw designed for gearcase drain and fill service on Cobra Drives \u0026amp; V-6 applications, 40-50HP (1989-97). The built-in magnetic tip attracts fine metal particles circulating in the gear lubricant, helping catch early signs of internal wear before they cause bigger gearcase problems. It is a direct replacement for OEM number 309243, so it installs in the original drain location without modification.\u003c\/p\u003e\u003cp\u003eThis drain screw is supplied in a package of 50, without washer, making it a practical choice for shops and technicians who service multiple units or want spares on hand for routine gearcase maintenance and lubricant changes. Keeping the drain screw magnetic and in good condition is a simple, low-cost way to monitor gearcase health during scheduled service intervals.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2378\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Magnetic Drain Screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 309243\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Cobra Drives \u0026amp; V-6, 40-50HP (1989-97)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 50 (without washer)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282257811\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eCobra Drives \u0026amp; V-6, 40-50HP (1989-97)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e309243\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2378 used for?\u003c\/strong\u003e The Sierra 18-2378 is a magnetic drain screw used in the gearcase drain and fill port to service gear lubricant on Cobra Drives \u0026amp; V-6 applications, 40-50HP (1989-97).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2378 replace OEM part 309243?\u003c\/strong\u003e Yes, Sierra part 18-2378 is a direct replacement for OEM number 309243.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does 'magnetic' mean on this drain screw?\u003c\/strong\u003e The tip of the 18-2378 drain screw is magnetized so it attracts fine metal particles suspended in the gear lubricant, giving a visual early indicator of internal wear when the screw is removed during service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines and horsepower range does 18-2378 fit?\u003c\/strong\u003e This drain screw fits Cobra Drives \u0026amp; V-6 applications rated 40-50HP (1989-97).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2378 come with a washer?\u003c\/strong\u003e No, the 18-2378 package is supplied without a washer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many drain screws come in a package of the 18-2378?\u003c\/strong\u003e The 18-2378 is packaged in a quantity of 50 per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2378 magnetic drain screw weigh?\u003c\/strong\u003e The Sierra 18-2378 weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2378 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-2378 is Sierra's own part number for this magnetic drain screw.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-2378 be used for both drain and fill service?\u003c\/strong\u003e Yes, the 18-2378 magnetic drain screw is used at the gearcase drain location during lubricant drain and fill service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2378?\u003c\/strong\u003e The UPC for the Sierra 18-2378 magnetic drain screw is 808282257811.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988106129627,"sku":"SIE-18-2378","price":13.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2378__24863.1722363214.500.750.jpg?v=1785329169"},{"product_id":"sierra-18-2399-retaining-spring-replaces-omc-johnson-evinrude-324369-johnson-outboard-gearcase-clutch-dog-spring","title":"Sierra 18-2399 Retaining Spring - Replaces 324369 for V-4 \u0026 V-6 Outboard Gearcase","description":"\u003cp\u003eThe Sierra 18-2399 Retaining Spring is a small precision-machined spring used in the gearcase of V-4 \u0026amp; V-6 outboard engines. It is designed to hold internal gearcase components securely in place, and it is built to meet or exceed the quality of the original equipment part it replaces. This retaining spring is sold as a package of 2, so buyers rebuilding or servicing a gearcase get both springs needed for the job in a single purchase.\u003c\/p\u003e\u003cp\u003eBecause retaining springs are precision-fit components, using the correct part number matters for proper seating and long-term reliability inside the gearcase. The Sierra 18-2399 is manufactured with a machined finish for a consistent, accurate fit, and it directly replaces OEM part number 324369 on applicable V-4 \u0026amp; V-6 outboard engines.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2399\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Retaining Spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e V-4 \u0026amp; V-6 outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 (priced per package)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282243616\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 324369\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eV-4 \u0026amp; V-6 outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e324369\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-2399 retaining spring fit?\u003c\/strong\u003e The Sierra 18-2399 is designed for V-4 \u0026amp; V-6 outboard engines and is not the same part used on 2 \u0026amp; 3 cylinder engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-2399 replace?\u003c\/strong\u003e It replaces OEM part number 324369, which is the original retaining spring used in the gearcase of V-4 \u0026amp; V-6 outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many springs come in one package of part number 18-2399?\u003c\/strong\u003e Two retaining springs are included, since the Sierra 18-2399 is priced and sold per package of 2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2399 retaining spring made from or finished with?\u003c\/strong\u003e The 18-2399 has a machined finish, giving it a precise, consistent fit inside the gearcase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2399 weigh?\u003c\/strong\u003e This retaining spring weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-2399 retaining spring?\u003c\/strong\u003e The part measures 0.39 x 0.39 x 0.39 inches, reflecting its small, compact size as a gearcase retaining spring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2399 an aftermarket part or genuine OEM?\u003c\/strong\u003e The 18-2399 is a Sierra-manufactured replacement part built to meet or exceed the quality of the original equipment retaining spring it replaces, rather than a genuine OEM-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2399 work on a 2 or 3 cylinder outboard gearcase?\u003c\/strong\u003e No, the Sierra 18-2399 is intended for V-4 \u0026amp; V-6 outboard engines; a different Sierra retaining spring is used for 2 \u0026amp; 3 cylinder applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-2399?\u003c\/strong\u003e Ordering the Sierra 18-2399 gets you a package of 2 retaining springs sized for V-4 \u0026amp; V-6 outboard gearcases.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the UPC 808282243616 associated with this retaining spring?\u003c\/strong\u003e Yes, UPC 808282243616 corresponds to the Sierra 18-2399 retaining spring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2399 require any modification to install?\u003c\/strong\u003e The Sierra 18-2399 is a direct-fit retaining spring for V-4 \u0026amp; V-6 outboard gearcases and replaces OEM part 324369 without modification.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988106260699,"sku":"SIE-18-2399","price":2.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2399_lg__33394.1558124543.500.750.jpg?v=1785188056"},{"product_id":"sierra-18-2454-drain-plug-for-omc-cobra-sx-sterndrive-drives-replaces-oem-3854539-3-8-16-thread","title":"Sierra Drain Plug 18-2454, Replaces 3854539, for OMC Cobra SX Sterndrive","description":"\u003cp\u003eThe Sierra Drain Plug 18-2454 is a replacement drain plug engineered for OMC Cobra SX sterndrives. It is used to seal the drain\/fill point on the drive housing, sealing against water intrusion and oil or lubricant loss during operation and storage. The plug features a 3\/8 inch - 16 thread and is designed to be used with a matching O-ring (Sierra 18-7145) to maintain a watertight seal at the drain port.\u003c\/p\u003e\u003cp\u003eThis part directly replaces OEM number 3854539, allowing owners of OMC Cobra SX drive systems to source a correct-fit plug without needing the original manufacturer part. Keeping the drain plug and its O-ring in good condition is important maintenance for any I\/O sterndrive, since a worn thread or failed seal at this point can allow lubricant to leak out or water to enter the lower unit.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2454\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Drain Plug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 3\/8 inch - 16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMating O-Ring:\u003c\/strong\u003e Sierra 18-7145\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282339784\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Sterndrive Engine Parts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC Cobra SX sterndrives\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3854539\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2454 drain plug fit?\u003c\/strong\u003e The Sierra 18-2454 is designed for OMC Cobra SX sterndrives, sealing the drive housing's drain and fill port.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2454 replace an OEM part number?\u003c\/strong\u003e Yes, Sierra 18-2454 directly replaces OEM number 3854539 on OMC Cobra SX sterndrives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat thread size is the 18-2454 drain plug?\u003c\/strong\u003e It uses a 3\/8 inch - 16 thread.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the drain plug come with an O-ring?\u003c\/strong\u003e The plug itself is sold as 18-2454; it is designed to be used with a matching Sierra 18-7145 O-ring for a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the O-ring included with part 18-2454?\u003c\/strong\u003e The dossier lists 18-2454 as the drain plug and 18-7145 as the O-ring used with it as a separate part number, so check whether both are included in your order.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2454 drain plug weigh?\u003c\/strong\u003e The Sierra 18-2454 drain plug weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this drain plug?\u003c\/strong\u003e The 18-2454 drain plug measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is part 18-2454 used for?\u003c\/strong\u003e It seals the drain point on an OMC Cobra SX sterndrive housing, preventing lubricant loss and water intrusion.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2454 a genuine replacement or aftermarket equivalent?\u003c\/strong\u003e 18-2454 is a replacement part manufactured by Sierra that is a direct equivalent to OEM number 3854539.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-2454 fit other OMC sterndrive models besides the Cobra SX?\u003c\/strong\u003e The listed fitment for 18-2454 is OMC Cobra SX sterndrives; no other drive models are specified for this part.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988106359003,"sku":"SIE-18-2454","price":10.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2454__46674.1558184682.500.750.jpg?v=1785189162"},{"product_id":"sierra-18-2469-retainer-seal-kit-for-mercruiser-gearcase-drive-parts-mpn-118-2469","title":"Sierra Retainer Seal Kit 18-2469 for Mercruiser Gearcase and Drive","description":"\u003cp\u003eThe Sierra Retainer Seal Kit, part number 18-2469, is a gearcase and drive seal kit designed to restore a proper seal at the retainer during gearcase or drive maintenance and rebuilds on Mercruiser gearcase and drive units. Retainer seal kits like this one are used whenever a gearcase is opened up for service, since the original seals are typically compromised on removal and should not be reused. Installing a fresh retainer seal kit at reassembly helps maintain the lubricant seal at the retainer, protecting internal gearcase components from water intrusion and lubricant loss.\u003c\/p\u003e\u003cp\u003eThis kit is sold under the Sierra brand, a name widely used in the marine aftermarket for gearcase, drive, and engine seal and gasket kits. It is intended for technicians and boat owners performing gearcase or drive service on applicable Mercruiser units and is sized to fit as a direct kit for part number 18-2469.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2469\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Retainer Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282386337\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 pound\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 6 x 5 x 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Gearcase and Drive Parts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eMercruiser gearcase and drive applications; consult your gearcase parts diagram to confirm part number 18-2469 is called for on your unit.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eNo OEM cross-reference numbers are listed for this part number.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2469 Retainer Seal Kit used for?\u003c\/strong\u003e Part number 18-2469 is a retainer seal kit used during gearcase or drive service to reseal the retainer area on Mercruiser gearcase and drive units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2469 kit fit Mercruiser drives?\u003c\/strong\u003e Yes, the Sierra 18-2469 Retainer Seal Kit is categorized for Mercruiser gearcase and drive applications; check your unit's parts diagram to confirm 18-2469 is the correct kit for your specific gearcase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2469 Retainer Seal Kit weigh?\u003c\/strong\u003e The kit weighs 1 pound.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-2469 kit?\u003c\/strong\u003e The package measures 6 x 5 x 2 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there OEM cross-reference numbers for part 18-2469?\u003c\/strong\u003e No OEM cross-reference or replacement numbers are listed for the Sierra 18-2469 Retainer Seal Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2469 a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e Part number 18-2469 is a Sierra brand retainer seal kit, sold under the Sierra name as listed by its manufacturer part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the retainer seals with kit 18-2469?\u003c\/strong\u003e Retainer seals should be replaced any time the gearcase or drive retainer is removed for service, since original seals are generally not reusable; the 18-2469 kit supplies fresh seals for reassembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2469 Retainer Seal Kit?\u003c\/strong\u003e The Sierra 18-2469 kit is a retainer seal kit, supplying the seals needed to reseal the retainer during a gearcase or drive rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2469 Retainer Seal Kit?\u003c\/strong\u003e The UPC for this kit is 808282386337.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I reuse old retainer seals instead of buying the 18-2469 kit?\u003c\/strong\u003e Reusing old retainer seals is not recommended once a gearcase retainer has been removed, which is why a fresh kit like the Sierra 18-2469 is typically installed at reassembly.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988106653915,"sku":"SIE-18-2469","price":86.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2469__82592.1739477160.500.750.jpg?v=1785189019"},{"product_id":"sierra-18-2586-upper-unit-seal-kit-for-volvo-penta-sx-thru-2006-replaces-oem-3850594","title":"Sierra 18-2586 Upper Unit Seal Kit for Volvo Penta - Replaces 3850594","description":"\u003cp\u003eThe Sierra 18-2586 Upper Unit Seal Kit is a rubber and silicone seal set engineered for sealing the upper unit on Volvo Penta drive applications. Built to prevent water intrusion and lubricant leakage at critical seal points, this kit is a straightforward way to restore a tight, reliable seal during a rebuild or routine maintenance of the upper drive unit. Each kit ships as a complete set (1 unit count) so you have the seals needed for the job in one package, without having to source individual components separately.\u003c\/p\u003e\u003cp\u003eThe kit is molded in white rubber and silicone material for durability and a consistent seal under marine operating conditions. It is manufactured in Taiwan and carries the Sierra brand's standard limited warranty. Boat owners and marine technicians use this kit when servicing Volvo Penta lower\/upper unit assemblies, replacing worn factory seals that have hardened, cracked, or begun to leak with age.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2586\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Upper Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Rubber, Silicone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.17 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 17.1 centimeters H x 3.5 centimeters L x 14 centimeters W\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282227661\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for sealing Volvo Penta drive engines.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3850594\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2586 Upper Unit Seal Kit include?\u003c\/strong\u003e The kit includes 1 complete set of rubber and silicone seals for the upper unit, part number 18-2586, packaged as a single unit count.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-2586 replace?\u003c\/strong\u003e Sierra 18-2586 replaces Volvo OEM part number 3850594.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is this seal kit used for?\u003c\/strong\u003e It seals the upper unit on Volvo Penta drive engines, preventing water intrusion and lubricant leakage at the seal points during a rebuild or routine service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material are the seals made from?\u003c\/strong\u003e The seals in kit 18-2586 are made from rubber and silicone, colored white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2586 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2586 Upper Unit Seal Kit weighs 0.17 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-2586 seal kit manufactured?\u003c\/strong\u003e This seal kit is manufactured in Taiwan.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2586 kit genuine OEM or aftermarket?\u003c\/strong\u003e It is a Sierra-brand aftermarket replacement kit, designed to replace the equivalent Volvo OEM part 3850594.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in the 18-2586 kit?\u003c\/strong\u003e The kit ships as a single complete set, listed as 1 unit count, containing the seals needed for the upper unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2586 kit come with a warranty?\u003c\/strong\u003e Yes, the 18-2586 Upper Unit Seal Kit is covered by Sierra's limited warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-2586 seal kit?\u003c\/strong\u003e The package for Sierra 18-2586 measures 17.1 centimeters H x 3.5 centimeters L x 14 centimeters W.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107210971,"sku":"SIE-18-2586","price":62.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2586_lg__23844.1558124002.500.750.jpg?v=1785189150"},{"product_id":"sierra-18-2599-face-seal-and-tool-replaces-mercruiser-26-816575a2-fits-alpha-one-gen-ii-drives","title":"Sierra 18-2599 Face Seal and Tool, Fits Alpha One Gen II Drives, Replaces 26-816575A2","description":"\u003cp\u003eThe Sierra 18-2599 Face Seal and Tool is a drive seal designed for Alpha One Gen II sterndrives, supplied as a face seal along with the installation tool needed to seat it correctly. The face seal is a wear item inside the drive housing that maintains the seal between rotating and stationary components, and using the correct tool during installation helps the seal seat evenly and prevents damage that can occur when it is pressed in without one. The seal is molded from nitrile rubber or Viton, materials chosen for their resistance to marine lubricants, water intrusion, and the heat generated at the drive interface. Sierra manufactures this seal and tool to meet or exceed the specification of the original equipment part it replaces, and it is built to be interchangeable with the corresponding OEM and aftermarket part numbers used across Alpha One Gen II applications. The package includes one face seal and one tool, so no separate tool purchase is needed to complete the installation. This part is commonly replaced during drive seal service, prop shaft bearing carrier rebuilds, or general Alpha One Gen II maintenance where the face seal has begun to leak or show wear. Sierra backs this product with its standard customer satisfaction warranty.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2599\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Face Seal and Tool\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Nitrile rubber or Viton\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999875105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Alpha One Gen II drives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 26-816575A2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eAlpha One Gen II drives\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e26-816575A2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2599 fit?\u003c\/strong\u003e The Sierra 18-2599 Face Seal and Tool is designed for Alpha One Gen II sterndrives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2599 the same as OEM part 26-816575A2?\u003c\/strong\u003e Yes, the Sierra 18-2599 is designed to be interchangeable with Mercruiser\/Mercury OEM part 26-816575A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this part cross-reference to any other brands?\u003c\/strong\u003e Sierra 18-2599 is designed to be interchangeable with GLM 85590 and Mallory 9-3628, in addition to Mercruiser\/Mercury 26-816575A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the package?\u003c\/strong\u003e One count of the face seal and one installation tool ship together in the Sierra 18-2599 package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the face seal made of?\u003c\/strong\u003e The Sierra 18-2599 face seal is molded from nitrile rubber or Viton, materials chosen for resistance to marine lubricants and water.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a special tool to install this seal?\u003c\/strong\u003e No separate tool purchase is needed; the Sierra 18-2599 package already includes the tool required to seat the face seal correctly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2599 weigh?\u003c\/strong\u003e The Sierra 18-2599 Face Seal and Tool weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2599 a genuine Sierra part or a generic aftermarket seal?\u003c\/strong\u003e It is a genuine Sierra-manufactured part, produced to meet or exceed the specification of the original equipment seal it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is a face seal used for on a sterndrive?\u003c\/strong\u003e A face seal, like the Sierra 18-2599, seals the interface inside the Alpha One Gen II drive housing to keep water out and lubricant in around the rotating shaft.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2599 covered under warranty?\u003c\/strong\u003e Yes, the Sierra 18-2599 Face Seal and Tool is covered under Sierra's customer satisfaction warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107342043,"sku":"SIE-18-2599","price":6.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2599_lg__79055.1558124792.500.750.jpg?v=1785188039"},{"product_id":"lower-unit-gear-housing-seal-kit-for-volvo-penta-sx-thru-2006-replaces-oem-3855275","title":"Sierra Gear Housing Seal Kit 18-2598, Replaces Volvo Penta 3855275","description":"\u003cp\u003eThe Sierra Gear Housing Seal Kit, part number 18-2598, is a lower unit gear housing seal set for Volvo Penta stern drive and outdrive applications. The kit is built to renew the sealing surfaces of the gear housing where the driveshaft and related components pass through, helping keep gear lubricant contained and water out of the lower unit during service or a full gear housing rebuild. Using a complete seal kit rather than sourcing individual seals ensures every wear point in the housing gets fresh sealing material at the same time, reducing the chance of a repeat teardown from a seal that was left in place. The kit is finished in white and is packaged as a single set ready to install during routine lower unit maintenance. It directly interchanges with Volvo Penta part number 3855275, making it a straightforward replacement for that OEM number without needing to track down individual Volvo Penta seal components. This is a maintenance item for boat owners and marine technicians performing scheduled gear housing service, winterization teardowns, or repairs following a suspected water intrusion or lubricant leak.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2598\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Gear Housing Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Volvo Penta lower unit \/ gear housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.17 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 4.318 H x 11.938 L x 8.636 W (centimeters)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Volvo Penta applications using OEM gear housing seal 3855275.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eVolvo Penta 3855275\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2598 Gear Housing Seal Kit fit?\u003c\/strong\u003e The Sierra 18-2598 kit is designed for Volvo Penta lower unit \/ gear housing applications and directly interchanges with Volvo Penta seal part 3855275.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-2598 a direct replacement for Volvo Penta 3855275?\u003c\/strong\u003e Yes, Sierra part 18-2598 replaces Volvo Penta OEM number 3855275, so it can be installed in place of that part without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2598 seal kit?\u003c\/strong\u003e The kit is packaged as a single complete set of gear housing seals, sold as one unit count, rather than individual loose seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2598 seal kit weigh?\u003c\/strong\u003e The Sierra Gear Housing Seal Kit 18-2598 weighs 0.17 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-2598 kit?\u003c\/strong\u003e The packaged kit measures 4.318 H x 11.938 L x 8.636 W in centimeters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color are the seals in kit 18-2598?\u003c\/strong\u003e The seals and packaging for the Sierra 18-2598 Gear Housing Seal Kit are white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace my gear housing seals with kit 18-2598?\u003c\/strong\u003e Gear housing seal kit 18-2598 is intended for use during scheduled lower unit maintenance, a full gear housing rebuild, or after signs of water intrusion or gear lubricant leakage from the housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2598 a genuine Volvo Penta part or an aftermarket equivalent?\u003c\/strong\u003e Sierra 18-2598 is a Sierra-branded seal kit built to replace Volvo Penta part 3855275, functioning as an aftermarket equivalent to that OEM number rather than a Volvo Penta-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use kit 18-2598 on any stern drive lower unit?\u003c\/strong\u003e Kit 18-2598 is built for Volvo Penta gear housing applications specifically; it is not stated to fit other manufacturers' lower units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes replacing the seals with 18-2598 require a full lower unit teardown?\u003c\/strong\u003e Installing the Sierra 18-2598 Gear Housing Seal Kit is done during gear housing service, since the seals are located within the housing itself; the specific disassembly steps depend on the lower unit being serviced.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107473115,"sku":"SIE-18-2598","price":41.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2598_lg__22235.1558124741.500.750.jpg?v=1785188868"},{"product_id":"sierra-18-2614-outdrive-gasket-set-for-mercruiser-bell-housing-replaces-27-64818a1-1967-1982","title":"Sierra Outdrive Gasket Set 18-2614, Replaces 27-64818, MerCruiser 1967-1982","description":"\u003cp\u003eThe Sierra 18-2614 Outdrive Gasket Set is a complete gasket kit designed for MerCruiser outdrive installations covering 1967-1982. This kit is built to reseal the connection points between the drive shaft housing and bell housing, helping prevent water intrusion and gear lube leaks at critical outdrive mating surfaces. The set includes the drive shaft housing to bell housing gasket along with the additional gaskets and O-ring needed for a complete reseal in one package, so installers do not need to source individual components separately.\u003c\/p\u003e\u003cp\u003eEach gasket in the set is manufactured to match OEM dimensions and sealing surfaces, allowing for a proper fit without modification. This set is commonly used during outdrive removal and reinstallation, gimbal housing service, or any time the bell housing is separated from the drive shaft housing on covered MerCruiser applications. Using a complete matched gasket set rather than reusing old gaskets helps ensure a consistent seal across all mating surfaces serviced during the job.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2614\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Outdrive Gasket Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.13 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312563\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContents:\u003c\/strong\u003e Drive Shaft Housing to Bell Housing Gasket (18-2820), additional gasket (18-2840), O-ring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMerCruiser outdrive applications, 1967-1982\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-64818A1\u003c\/li\u003e\n\u003cli\u003e27-64818T4\u003c\/li\u003e\n\u003cli\u003e27-64818Q4\u003c\/li\u003e\n\u003cli\u003e27-64818A20\u003c\/li\u003e\n\u003cli\u003e27-64818A4\u003c\/li\u003e\n\u003cli\u003e27-64818\u003c\/li\u003e\n\u003cli\u003e27-45821\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2614 gasket set include?\u003c\/strong\u003e The 18-2614 kit includes the drive shaft housing to bell housing gasket (18-2820), an additional gasket (18-2840), and an O-ring, giving you every gasket needed to reseal that outdrive connection in one package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat years does this outdrive gasket set fit?\u003c\/strong\u003e Sierra 18-2614 is designed for MerCruiser outdrive applications covering 1967-1982.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2614 set a direct OEM replacement?\u003c\/strong\u003e Yes, it is manufactured to match OEM dimensions and sealing surfaces, so it installs without modification in place of the original gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does 18-2614 cross-reference to?\u003c\/strong\u003e This set replaces OEM numbers 27-64818A1, 27-64818T4, 27-64818Q4, 27-64818A20, 27-64818A4, 27-64818, and 27-45821.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2614 gasket set weigh?\u003c\/strong\u003e The Sierra 18-2614 Outdrive Gasket Set weighs 0.13 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace these gaskets?\u003c\/strong\u003e Replace the gaskets in the 18-2614 set any time the drive shaft housing is separated from the bell housing, such as during outdrive removal or gimbal housing service, rather than reusing the old gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit include the drive shaft housing to bell housing gasket?\u003c\/strong\u003e Yes, that gasket, cataloged as 18-2820 with OEM number 27-64818, is included in the 18-2614 set along with the other gaskets needed for the job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I reuse old gaskets instead of buying this set?\u003c\/strong\u003e Reusing old gaskets at the drive shaft housing to bell housing joint risks water intrusion or gear lube leaks; the 18-2614 set provides fresh, correctly sized gaskets for a proper reseal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2614 gasket set?\u003c\/strong\u003e The UPC for the Sierra 18-2614 Outdrive Gasket Set is 030999312563.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this gasket set specific to MerCruiser outdrives?\u003c\/strong\u003e Yes, the 18-2614 set is designed for MerCruiser outdrive applications from 1967-1982.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107702491,"sku":"SIE-18-2614","price":6.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2614_lg__34813.1558122532.500.750.jpg?v=1785329175"},{"product_id":"sierra-18-2613-outdrive-gasket-set-replaces-omc-508105-omc-sterndrive-bellows-transom-seal-kit","title":"Sierra 18-2613 Outdrive Gasket Set - Replaces OMC 508105","description":"\u003cp\u003eThe Sierra 18-2613 Outdrive Gasket Set is a complete kit for resealing the outdrive housing on applicable stern drive units. It bundles the three components needed to restore a proper seal at the outdrive mating surfaces: an outdrive gasket, an outdrive seal, and an O-ring, so installers do not have to source each piece separately. Using a fresh gasket set at reassembly helps prevent water intrusion and lubricant leaks at the outdrive housing joint, which is a common failure point during outdrive service or when the unit has been removed for repair.\u003c\/p\u003e\u003cp\u003eThis set directly replaces OMC part number 508105, making it a straightforward drop-in solution when the original equipment gasket set is no longer available or when performing routine maintenance. Each component in the kit corresponds to its own Sierra part number and original equipment number, so individual pieces can also be cross-checked against the original hardware being replaced. The set weighs 0.08 pounds and ships as a complete kit under a single part number, 18-2613.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2613\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Outdrive Gasket Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.08 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Thickness:\u003c\/strong\u003e 0.25 millimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Multi-colored\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312556\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 508105\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Outdrive Gasket (O.E. 911836, qty 1), Outdrive Seal (O.E. 911823, qty 1), O-Ring (O.E. 911851)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e508105\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2613 Outdrive Gasket Set include?\u003c\/strong\u003e The 18-2613 set includes an outdrive gasket (O.E. 911836), an outdrive seal (O.E. 911823), and an O-ring (O.E. 911851), giving you all three sealing components needed for one outdrive resealing job in a single kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2613 gasket set replace OMC 508105?\u003c\/strong\u003e Yes, Sierra 18-2613 is a direct replacement for OMC part number 508105.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2613 gasket set weigh?\u003c\/strong\u003e The complete kit weighs 0.08 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the thickness of the gasket in this set?\u003c\/strong\u003e The gasket component in the 18-2613 set measures 0.25 millimeters thick.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-2613 Outdrive Gasket Set is sold under the Sierra brand name and identified by Sierra part number 18-2613.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many pieces come in one 18-2613 set?\u003c\/strong\u003e One 18-2613 set contains a single unit count consisting of the gasket, seal, and O-ring needed for one resealing job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2613 Outdrive Gasket Set?\u003c\/strong\u003e The UPC for this gasket set is 030999312556.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan individual components of the 18-2613 set be identified separately?\u003c\/strong\u003e Yes, each piece in the 18-2613 kit has its own Sierra number: the outdrive gasket is 18-2918 (O.E. 911836), the outdrive seal is 18-2996 (O.E. 911823), and the O-ring is 18-7153 (O.E. 911851).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-2613 gasket set?\u003c\/strong\u003e The components in the Sierra 18-2613 set are multi-colored.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy replace the outdrive gasket and seal together instead of individually?\u003c\/strong\u003e The 18-2613 set bundles the gasket, seal, and O-ring together so all three sealing surfaces on the outdrive housing are renewed at the same time during a single service job.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107866331,"sku":"SIE-18-2613","price":5.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2613_lg__44335.1558122473.500.750.jpg?v=1785188627"},{"product_id":"sierra-18-2601-1-transom-seal-kit-replaces-mercury-30-803097t1-mercruiser-alpha-one-r-mr-1983-1990","title":"Sierra Transom Seal Kit 18-2601-1, Replaces 30-803097T1, Fits Mercury R, MR, Alpha One (1983-90) and Alpha One SS (1986-89)","description":"\u003cp\u003eThe Sierra 18-2601-1 Transom Seal Kit is a complete stainless steel gimbal bearing and bellows service kit for sterndrive units. It restores a watertight, corrosion-resistant seal at the transom assembly where the drive shaft, exhaust, and U-joint pass through the boat's hull, an area that must be replaced on a regular service interval to prevent water intrusion into the bilge or gearcase.\u003c\/p\u003e\u003cp\u003eThis kit contains a Sierra 18-2100 Gimbal Bearing (cross-referencing O.E. Numbers 30-60794A4 and 30-60794A2) and a Sierra 18-2751 U-Joint Bellows (cross-referencing O.E. Number 60932A4), each supplied in the correct quantity of one for a single transom service job. Components are manufactured in round, stainless steel construction for corrosion resistance in the marine environment.\u003c\/p\u003e\u003cp\u003eThe 18-2601-1 kit is designed to replace Mercury\/Mercruiser part number 30-803097T1. It fits Mercury R, MR, and Alpha One sterndrives (1983-90) with serial numbers 6225577 and up, as well as Alpha One SS sterndrives (1986-89) with serial numbers OA 545004 and up.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2601-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 5.35 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Shape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282186661\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents - Gimbal Bearing:\u003c\/strong\u003e Sierra 18-2100 (O.E. 30-60794A4, 30-60794A2), Qty 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents - U-Joint Bellows:\u003c\/strong\u003e Sierra 18-2751 (O.E. 60932A4), Qty 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury R, MR, Alpha One (1983-90), S\/N 6225577 \u0026amp; Up\u003c\/li\u003e\n\u003cli\u003eMercury Alpha One SS (1986-89), S\/N OA 545004 \u0026amp; Up\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e30-803097T1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2601-1 Transom Seal Kit include?\u003c\/strong\u003e The kit includes a Sierra 18-2100 Gimbal Bearing (cross-referencing O.E. Numbers 30-60794A4 and 30-60794A2) and a Sierra 18-2751 U-Joint Bellows (cross-referencing O.E. Number 60932A4), each supplied in a quantity of one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat Mercury drives does the 18-2601-1 fit?\u003c\/strong\u003e It fits Mercury R, MR, and Alpha One sterndrives (1983-90) with serial numbers 6225577 and up, and Mercury Alpha One SS sterndrives (1986-89) with serial numbers OA 545004 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the Sierra 18-2601-1 replace?\u003c\/strong\u003e The Sierra 18-2601-1 Transom Seal Kit replaces OEM part number 30-803097T1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-2601-1 kit made from?\u003c\/strong\u003e The components in the 18-2601-1 Transom Seal Kit are made of stainless steel with a round shape, providing corrosion resistance in marine service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2601-1 Transom Seal Kit weigh?\u003c\/strong\u003e The 18-2601-1 Transom Seal Kit weighs 5.35 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the gimbal bearing in this kit sold separately?\u003c\/strong\u003e The gimbal bearing included in the 18-2601-1 kit is Sierra part number 18-2100, cross-referencing O.E. Numbers 30-60794A4 and 30-60794A2; it is packaged here as part of the 18-2601-1 Transom Seal Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat U-joint bellows does the 18-2601-1 kit contain?\u003c\/strong\u003e It contains a Sierra 18-2751 U-Joint Bellows, which cross-references O.E. Part number 60932A4.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many of each part are in the transom seal kit?\u003c\/strong\u003e The 18-2601-1 kit contains one gimbal bearing and one U-joint bellows, matching the package quantity of one kit per unit sold.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes my serial number matter when ordering the 18-2601-1 kit?\u003c\/strong\u003e Yes. The kit fits Mercury R, MR, and Alpha One drives (1983-90) starting at serial number 6225577, and Alpha One SS drives (1986-89) starting at serial number OA 545004, so confirm your drive's serial number falls within these ranges before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2601-1 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-2601-1 is the Sierra manufacturer part number for this Transom Seal Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2601-1 kit?\u003c\/strong\u003e The Sierra 18-2601-1 Transom Seal Kit has UPC 808282186661.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107899099,"sku":"SIE-18-2601-1","price":194.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__63727.1753840676.500.750.jpg?v=1785189057"},{"product_id":"sierra-18-2615-outdrive-gasket-set-for-mercruiser-bravo-drives-replaces-16755a1","title":"Sierra 18-2615 Outdrive Gasket Set, Replaces Mercury Marine 16755A1, Fits All Bravo","description":"\u003cp\u003eThe Sierra 18-2615 Outdrive Gasket Set is a complete seal and O-ring kit for Bravo unit outdrives, giving you every soft part needed to reseal the drive during a rebuild or service in one purchase instead of sourcing each piece separately. The kit is built to the OEM specification and directly replaces Mercury Marine 16755, 16755A1, 16755Q1, and 16755T1, so it drops into the same application without modification.\u003c\/p\u003e\u003cp\u003eInside the set you get the components needed for the outdrive gasket job: a seal (Sierra 18-2516, O.E. 16755), an O-ring (Sierra 18-7198, O.E. 25-45710), and an O-ring (Sierra 18-7153, O.E. 25-33504). Using a matched kit like this helps ensure the seals and O-rings you install are sized and rated correctly for the outdrive housing, reducing the risk of leaks from mismatched aftermarket substitutes. This set is designed for All Bravo outdrives, making it a straightforward choice when servicing this drive family.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2615\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Outdrive Gasket Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e All Bravo\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Seal (18-2516, O.E. 16755); O-Ring (18-7198, O.E. 25-45710); O-Ring (18-7153, O.E. 25-33504)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Thickness:\u003c\/strong\u003e 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999237231\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 16755, 16755A1, 16755Q1, 16755T1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eAll Bravo outdrives\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e16755\u003c\/li\u003e\n\u003cli\u003e16755A1\u003c\/li\u003e\n\u003cli\u003e16755Q1\u003c\/li\u003e\n\u003cli\u003e16755T1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2615 Outdrive Gasket Set include?\u003c\/strong\u003e The kit includes a seal (Sierra 18-2516, O.E. 16755), an O-ring (Sierra 18-7198, O.E. 25-45710), and an O-ring (Sierra 18-7153, O.E. 25-33504), giving you every soft part needed for one outdrive reseal job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket set fit a Bravo outdrive?\u003c\/strong\u003e Yes, the Sierra 18-2615 Outdrive Gasket Set is designed for All Bravo outdrives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2615 the same as Mercury Marine 16755A1?\u003c\/strong\u003e It is a direct replacement for Mercury Marine 16755, 16755A1, 16755Q1, and 16755T1, so it can be used in place of any of those OEM numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow thick is the O-ring in the 18-2615 kit?\u003c\/strong\u003e The item thickness listed for the Sierra 18-2615 Outdrive Gasket Set is 0.25 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2615 Outdrive Gasket Set weigh?\u003c\/strong\u003e This Sierra gasket set weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I order the individual seal or O-ring instead of the full kit?\u003c\/strong\u003e The full Sierra 18-2615 Outdrive Gasket Set bundles the seal (18-2516) and both O-rings (18-7198 and 18-7153) together as one kit for a complete reseal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2615 Outdrive Gasket Set?\u003c\/strong\u003e The UPC is 030999237231.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need this outdrive gasket set?\u003c\/strong\u003e This set is used when resealing or rebuilding a Bravo outdrive, replacing the seal and O-rings that commonly need renewal during service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2615 an OEM-quality replacement?\u003c\/strong\u003e Sierra manufactures the 18-2615 set to the OEM specification of Mercury Marine 16755, 16755A1, 16755Q1, and 16755T1, making it a direct equivalent rather than a generic substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this kit work on any Bravo model, or just specific ones?\u003c\/strong\u003e The Sierra 18-2615 Outdrive Gasket Set is listed for All Bravo outdrives, without limitation to a specific Bravo model.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107931867,"sku":"SIE-18-2615","price":6.07,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2615__31311.1558315614.500.750.jpg?v=1785187970"},{"product_id":"sierra-18-2619-1-outdrive-gasket-set-replaces-mercruiser-27-94996-fits-r-mr-alpha-one-alpha-gen-ii-1983-newer","title":"Sierra 18-2619-1 Outdrive Gasket Set - Replaces 27-64818A3, Fits MerCruiser 1, R, MR, Alpha 1 with Exhaust Tube","description":"\u003cp\u003eThe Sierra 18-2619-1 Outdrive Gasket Set is a complete kit of gaskets and O-rings for servicing the bell housing and outdrive mounting area on compatible MerCruiser stern drives. It is built for drives designated 1, R, MR, and Alpha 1 with exhaust tube, and is used any time the outdrive is separated from the transom assembly, such as during gimbal bearing, u-joint, or bell housing service. The set contains five individual pieces: an 18-2743 outdrive gasket, an 18-2840 bell housing gasket, and three O-rings (18-7117, 18-7153, and 18-7170), so the technician has every sealing component needed for the job in one package rather than sourcing each part separately. The components are supplied as a display pack with a plastic material composition. Using a complete matched gasket set like the 18-2619-1, rather than reusing old gaskets or mixing in generic parts, helps ensure a proper seal against water intrusion and exhaust leakage at the outdrive-to-transom joint. The 18-2619-1 cross-references directly to the OEM Mercury\/MerCruiser part numbers below, so it is a direct fit replacement for the original equipment set on applicable drives.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2619-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Outdrive Gasket Set (Display Pack)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSet Contents:\u003c\/strong\u003e 18-2743 Outdrive Gasket, 18-2840 Bell Housing Gasket, 18-7117 O-Ring, 18-7153 O-Ring, 18-7170 O-Ring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.08 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282120207\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e MerCruiser 1, R, MR, Alpha 1 with exhaust tube\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-64818A3, 27-94996A1, 27-94996Q2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMerCruiser 1, R, MR, Alpha 1 with exhaust tube\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-64818A3\u003c\/li\u003e\n\u003cli\u003e27-94996A1\u003c\/li\u003e\n\u003cli\u003e27-94996Q2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2619-1 outdrive gasket set include?\u003c\/strong\u003e The 18-2619-1 set includes an 18-2743 outdrive gasket, an 18-2840 bell housing gasket, and three O-rings (18-7117, 18-7153, and 18-7170), for a total of five sealing components in one package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich drives does the 18-2619-1 gasket set fit?\u003c\/strong\u003e This Sierra gasket set is designated for MerCruiser 1, R, MR, and Alpha 1 outdrives equipped with an exhaust tube.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does 18-2619-1 replace?\u003c\/strong\u003e The Sierra 18-2619-1 outdrive gasket set replaces OEM numbers 27-64818A3, 27-94996A1, and 27-94996Q2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2619-1 outdrive gasket set weigh?\u003c\/strong\u003e It weighs 0.08 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a bell housing gasket included in this kit?\u003c\/strong\u003e Yes, the 18-2619-1 set includes an 18-2840 bell housing gasket along with the outdrive gasket and three O-rings.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat O-rings come in the Sierra 18-2619-1 kit?\u003c\/strong\u003e Three O-rings are included: 18-7117, 18-7153, and 18-7170.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material are the gaskets and O-rings made of?\u003c\/strong\u003e The components in the 18-2619-1 set are made of plastic.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2619-1 the correct gasket set for an Alpha 1 outdrive?\u003c\/strong\u003e Yes, the 18-2619-1 set is specified for MerCruiser Alpha 1 outdrives, in addition to the 1, R, and MR drives, when equipped with an exhaust tube.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many pieces are in the 18-2619-1 outdrive gasket set?\u003c\/strong\u003e The kit contains 5 individual pieces: one outdrive gasket, one bell housing gasket, and three O-rings, packaged as a single display pack.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2619-1 gasket set?\u003c\/strong\u003e The UPC for this Sierra outdrive gasket set is 808282120207.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2619-1 set work on drives without an exhaust tube?\u003c\/strong\u003e The 18-2619-1 gasket set is specified for MerCruiser 1, R, MR, and Alpha 1 drives with exhaust tube; fitment for drives without an exhaust tube is not specified for this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the gaskets in the 18-2619-1 set sold individually as well?\u003c\/strong\u003e The 18-2619-1 set contains gasket 18-2743, gasket 18-2840, and O-rings 18-7117, 18-7153, and 18-7170, each identified by its own Sierra part number within this combined kit.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107997403,"sku":"SIE-18-2619-1","price":7.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2619-1_lg__47510.1558122696.500.750.jpg?v=1785188040"},{"product_id":"outdrive-gasket-set-for-mercruiser-e-h-tr-trs-drives-replaces-oem-27-54014a1","title":"Sierra Outdrive Gasket Set 18-2620 for MerCruiser TR-TRS Drives, Replaces 27-54014A1","description":"\u003cp\u003eThe Sierra 18-2620 Outdrive Gasket Set is a complete gasket kit engineered for MerCruiser TR and TRS stern drives, serial number 4794900 and up, specifically for drive housings equipped with an oil reservoir check valve. This set also fits 215E and 215H drive applications. It is designed to restore a proper seal at the outdrive housing during a rebuild or service job, preventing water intrusion and lubricant leakage that can lead to gear housing damage. As a direct cross-reference to Mercury Marine part numbers 27-54014A1 and 27-54014Q1, it allows technicians and boat owners to service their outdrive without hunting down original manufacturer parts. Every gasket in the set is sized and shaped to match the factory fit points on the applicable MerCruiser drive housing, so installation follows the same steps as the original equipment. Because outdrive housings vary between drive models and serial ranges, confirming your drive's serial number and check valve configuration before ordering helps ensure the correct gasket set is installed. This set is sold as a single package covering the outdrive housing service points addressed by part number 18-2620.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2620\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Outdrive Gasket Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e MerCruiser TR and TRS drives, serial number 4794900 and up\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlso Fits:\u003c\/strong\u003e 215E and 215H drives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication Note:\u003c\/strong\u003e For housings with oil reservoir check valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-54014A1, 27-54014Q1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.13 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282257972\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1 gasket set\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser TR-TRS drives, serial number 4794900 and up (for housings with oil reservoir check valve)\u003c\/li\u003e\n\u003cli\u003e215E and 215H drives\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-54014A1\u003c\/li\u003e\n\u003cli\u003e27-54014Q1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat drives does the Sierra 18-2620 outdrive gasket set fit?\u003c\/strong\u003e Sierra 18-2620 is built for MerCruiser TR and TRS drives, serial number 4794900 and up, and also fits 215E and 215H drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-2620 the same as Mercury Marine 27-54014A1?\u003c\/strong\u003e Yes, part number 18-2620 is a direct cross-reference to Mercury Marine 27-54014A1 and 27-54014Q1, so it installs in place of either OEM number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket set work on any outdrive housing, or only certain ones?\u003c\/strong\u003e The 18-2620 set is intended for TR-TRS drive housings that have an oil reservoir check valve, not for every outdrive housing configuration.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets are included in the 18-2620 set?\u003c\/strong\u003e The Sierra 18-2620 Outdrive Gasket Set is sold as a single complete set covering the outdrive housing service points for the applicable MerCruiser TR-TRS drive.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the shipping weight of the 18-2620 gasket set?\u003c\/strong\u003e The Sierra 18-2620 Outdrive Gasket Set weighs 0.13 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-2620 fit an Alpha One or Bravo drive?\u003c\/strong\u003e No, 18-2620 is specified for TR and TRS drives; Alpha One and Bravo drives use different gasket set part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm my drive matches the 4794900-and-up serial range for this gasket set?\u003c\/strong\u003e Check the serial number tag on your MerCruiser TR-TRS drive housing; 18-2620 applies to units at serial number 4794900 and up with an oil reservoir check valve.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2620 gasket set genuine Sierra or a generic aftermarket part?\u003c\/strong\u003e 18-2620 is a genuine Sierra part, manufactured as a direct cross-reference to the Mercury Marine 27-54014A1 and 27-54014Q1 outdrive gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2620 outdrive gasket set?\u003c\/strong\u003e The Sierra 18-2620 Outdrive Gasket Set carries UPC 808282257972.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the outdrive gaskets on a TR-TRS drive?\u003c\/strong\u003e The 18-2620 gasket set is used any time the outdrive housing on a MerCruiser TR-TRS drive is opened for service, since the original gaskets should not be reused once disturbed.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108030171,"sku":"SIE-18-2620","price":8.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2620_lg__69109.1558122765.500.750.jpg?v=1785189131"},{"product_id":"sierra-18-2622-bell-housing-bushing-kit-replaces-mercury-23-805041a2-for-mercruiser-sterndrive","title":"Sierra Bell Housing Bushing Kit 18-2622, Replaces Mercury Marine 23-805041A2","description":"\u003cp\u003eThe Sierra Bell Housing Bushing Kit, part number 18-2622, is a machined replacement bushing kit designed for the bell housing on applicable Mercury Marine drive and engine setups. This kit provides the precision-machined bushing needed to restore proper alignment and support between the engine and drive components, helping maintain smooth operation and reduce vibration or wear caused by a worn original bushing. The exterior finish is machined for accurate fit and consistent dimensional tolerances.\u003c\/p\u003e\u003cp\u003eCompact and lightweight, this kit is sized for straightforward installation as part of routine bell housing service or repair work. It is built to match the original equipment specification it replaces, making it a direct functional substitute where the corresponding Mercury Marine part is called for.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2622\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Bell Housing Bushing Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.19 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 1.06 x 4 x 5.12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior Finish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999975584\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Bellows\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits applications originally equipped with Mercury Marine part number 23-805041A2.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 23-805041A2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2622 Bell Housing Bushing Kit fit?\u003c\/strong\u003e This kit is designed as a direct match for applications that originally used Mercury Marine part number 23-805041A2, making it a straightforward replacement for that bushing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2622 the same as Mercury Marine 23-805041A2?\u003c\/strong\u003e Yes, part number 18-2622 is built to replace Mercury Marine 23-805041A2 directly, so it can be used in place of that original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the bushing made from?\u003c\/strong\u003e The bushing in kit 18-2622 has a machined exterior finish, giving it precise, consistent dimensions for a proper fit in the bell housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2622 bushing kit weigh?\u003c\/strong\u003e The Sierra Bell Housing Bushing Kit, part number 18-2622, weighs 0.19 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this bushing kit?\u003c\/strong\u003e Part number 18-2622 measures 1.06 x 4 x 5.12 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-2622 Bell Housing Bushing Kit is a genuine Sierra part, manufactured under Sierra's own part number rather than being a generic aftermarket copy.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2622 kit?\u003c\/strong\u003e The kit includes the machined bell housing bushing identified by Sierra part number 18-2622.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this bushing a wear item that needs periodic replacement?\u003c\/strong\u003e Bell housing bushings like the 18-2622 can wear over time from normal operation, and replacing it with this kit restores proper fit between the engine and drive components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes part number 18-2622 replace more than one OEM number?\u003c\/strong\u003e The only OEM cross-reference identified for the Sierra 18-2622 bushing kit is Mercury Marine 23-805041A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2622 bushing kit still available from the manufacturer?\u003c\/strong\u003e Yes, the Sierra 18-2622 Bell Housing Bushing Kit is an active part and has not been discontinued by the manufacturer.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108062939,"sku":"SIE-18-2622","price":42.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2622_lg__27815.1729087854.500.750.jpg?v=1785189105"},{"product_id":"upper-unit-seal-kit-18-2643-replaces-mercruiser-26-16709a2-for-bravo-blackhawk-upper-gear-housing","title":"Sierra 18-2643 Upper Unit Seal Kit for MerCruiser Bravo II X, Bravo III, Bravo III X and Blackhawk Drives","description":"\u003cp\u003eThe Sierra 18-2643 Upper Unit Seal Kit is a replacement seal set for the upper gear housing of MerCruiser Bravo II X, Bravo III, Bravo III X, and Blackhawk sterndrive units. This kit addresses the seals responsible for keeping gear lubricant contained and water out of the upper unit, a common service point during routine outdrive maintenance or when diagnosing gear housing leaks. Each kit ships as a complete set (one kit per package) so the seals can be replaced together during a single service interval, rather than sourcing individual seals separately.\u003c\/p\u003e\u003cp\u003eSierra manufactures this kit to meet or exceed the specifications of the original equipment seals it replaces, making it a direct equivalent for the applicable MerCruiser upper units. The kit fits specific serial-number ranges on the Bravo II X, Bravo III, Bravo III X, and Blackhawk drives, so confirming the drive model and serial number before ordering ensures the correct fit. As with all Sierra parts, this kit is backed by Sierra's standard limited warranty.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2643\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MerCruiser Upper Gear Housing Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.19 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999875204\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e MerCruiser Bravo II X, Bravo III, Bravo III X, Blackhawk\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e GLM 87480, Mallory 9-74301, Mercruiser 26-16709A1, 27-16709A2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser Bravo II X, 2000-2010, serial number M100001 \u0026amp; up\u003c\/li\u003e\n\u003cli\u003eMerCruiser Bravo III, 1988-2010, serial number B664190 \u0026amp; up\u003c\/li\u003e\n\u003cli\u003eMerCruiser Bravo III X, 2000-2010, serial number M100001 \u0026amp; up\u003c\/li\u003e\n\u003cli\u003eMerCruiser Blackhawk, 1994-1995, serial number F186717 \u0026amp; up\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 87480\u003c\/li\u003e\n\u003cli\u003eMallory 9-74301\u003c\/li\u003e\n\u003cli\u003eMercruiser 26-16709A1\u003c\/li\u003e\n\u003cli\u003e27-16709A2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2643 Upper Unit Seal Kit fit?\u003c\/strong\u003e This kit fits MerCruiser Bravo II X (2000-2010, serial number M100001 \u0026amp; up), Bravo III (1988-2010, serial number B664190 \u0026amp; up), Bravo III X (2000-2010, serial number M100001 \u0026amp; up), and Blackhawk (1994-1995, serial number F186717 \u0026amp; up) upper units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2643 kit interchangeable with OEM MerCruiser seals?\u003c\/strong\u003e Yes. The Sierra 18-2643 kit is cross-referenced to GLM 87480, Mallory 9-74301, Mercruiser 26-16709A1, and 27-16709A2, and is engineered to meet or exceed the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2643 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2643 Upper Unit Seal Kit weighs 0.19 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color are the seals in the 18-2643 kit?\u003c\/strong\u003e The seals in the Sierra 18-2643 Upper Unit Seal Kit are white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape are the seals in this kit?\u003c\/strong\u003e The seals included in the 18-2643 kit are round.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2643 kit fit a MerCruiser Bravo I drive?\u003c\/strong\u003e No fitment for a standard Bravo I is specified for the Sierra 18-2643 kit; it applies to Bravo II X, Bravo III, Bravo III X, and Blackhawk drives within the listed serial-number ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my drive is within the serial number range for this kit?\u003c\/strong\u003e Check your MerCruiser drive's serial number tag against the ranges for the Sierra 18-2643 kit: M100001 \u0026amp; up for Bravo II X and Bravo III X, B664190 \u0026amp; up for Bravo III, and F186717 \u0026amp; up for Blackhawk.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2643 kit?\u003c\/strong\u003e The Sierra 18-2643 Upper Unit Seal Kit includes one complete set of upper gear housing seals for the applicable MerCruiser drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2643 a genuine Sierra part or aftermarket?\u003c\/strong\u003e The 18-2643 is a genuine Sierra part, manufactured by Sierra as a direct-fit replacement for the original MerCruiser upper unit seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2643 kit come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-2643 Upper Unit Seal Kit is covered under Sierra's standard limited warranty like all Sierra parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2643 kit?\u003c\/strong\u003e The UPC for the Sierra 18-2643 Upper Unit Seal Kit is 030999875204.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the upper unit seals on a MerCruiser Bravo or Blackhawk drive?\u003c\/strong\u003e The Sierra 18-2643 kit is used when servicing the upper gear housing seals, typically to stop gear lubricant leaks or water intrusion in the upper unit of Bravo II X, Bravo III, Bravo III X, or Blackhawk drives.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108095707,"sku":"SIE-18-2643","price":90.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2643_lg__56288.1558124042.500.750.jpg?v=1785188544"},{"product_id":"lower-unit-seal-kit-26-814669a2-for-mercury-chrysler-outboard-gearcase-sierra-18-2635","title":"Sierra 18-2635 Lower Unit Seal Kit for Mercury Outboard Gearcase, Replaces 26-814669A2","description":"\u003cp\u003eThe Sierra 18-2635 Lower Unit Seal Kit is a gearcase seal kit built for Mercury outboard lower units, engineered to meet or exceed the quality of the original equipment part it replaces. This kit is designed as a direct service replacement for worn or leaking lower unit seals, helping keep gear lube contained and water out of the gearcase during operation. As with all Sierra parts, it is manufactured to meet or exceed OEM specifications, giving installers confidence that fit and performance will match or surpass the factory original.\u003c\/p\u003e\u003cp\u003eThe kit is packaged as a single unit count and is cross-referenced to several legacy OEM and aftermarket part numbers, making it a straightforward match for technicians and boat owners searching by an older Chrysler, GLM, or Mallory reference number as well as the current Mercury number. It is intended for use during routine lower unit maintenance, gearcase rebuilds, or when addressing a lower unit oil leak.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2635\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Gearcase Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.21 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282234966\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1.0 Count\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Mercury outboard gearcase applications.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eChrysler 26-814669A2\u003c\/li\u003e\n\u003cli\u003eChrysler 26-814669A1\u003c\/li\u003e\n\u003cli\u003eFK1234\u003c\/li\u003e\n\u003cli\u003eGLM 87809\u003c\/li\u003e\n\u003cli\u003eMallory 9-74204\u003c\/li\u003e\n\u003cli\u003eMercury 26-814669A2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2635 Lower Unit Seal Kit used for?\u003c\/strong\u003e It is a seal kit for a Mercury outboard lower unit gearcase, used to reseal the unit and stop gear lube leaks or water intrusion during routine maintenance or a gearcase rebuild.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2635 kit interchangeable with other brands' seal kits?\u003c\/strong\u003e Yes, Sierra part 18-2635 is interchangeable with Chrysler 26-814669A2, Chrysler 26-814669A1, FK1234, GLM 87809, Mallory 9-74204, and Mercury 26-814669A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Mercury 26-814669A2 seal kit cross to a Sierra part number?\u003c\/strong\u003e Mercury 26-814669A2 crosses directly to Sierra 18-2635, the Lower Unit Seal Kit covered here.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2635 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2635 Lower Unit Seal Kit weighs 0.21 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-2635 seal kit?\u003c\/strong\u003e The seals in Sierra kit 18-2635 are white in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many pieces come in the Sierra 18-2635 kit?\u003c\/strong\u003e Sierra 18-2635 is sold as a 1.0 count unit, packaged as a complete lower unit seal kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2635 an OEM or aftermarket part?\u003c\/strong\u003e It is a Sierra aftermarket replacement part manufactured to meet or exceed the original equipment quality of the Mercury lower unit seal it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2635 seal kit?\u003c\/strong\u003e The UPC for the Sierra 18-2635 Lower Unit Seal Kit is 808282234966.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape are the seals in the 18-2635 kit?\u003c\/strong\u003e The seals included in Sierra 18-2635 are round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2635 kit fit older Chrysler outboard lower units?\u003c\/strong\u003e Since Sierra 18-2635 cross-references to Chrysler 26-814669A2 and 26-814669A1, it fits lower units originally serviced by those Chrysler part numbers.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108161243,"sku":"SIE-18-2635","price":51.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2635_lg__13695.1558123567.500.750.jpg?v=1785188056"},{"product_id":"sierra-18-2624-lower-unit-seal-kit-replaces-mercury-26-85090a2-outboard-gearcase-seal-kit","title":"Sierra 18-2624 Lower Unit Seal Kit, Replaces 26-85090A2, Mercury Outboard Gearcase","description":"\u003cp\u003eThe Sierra 18-2624 Lower Unit Seal Kit is a gearcase seal kit built to restore a tight, leak-free lower unit on applicable Mercury outboard applications. Lower unit seals are a wear item: as the gearcase heats and cools through use, the rubber sealing lips lose their set and begin to weep gear lubricant or let water intrude, which left unaddressed can lead to contaminated gear oil and bearing or gear damage. This kit bundles the individual seal components needed to reseal the gearcase in one job rather than sourcing each seal separately, including an oil seal (Sierra part 18-0579) among its contents. Each Sierra seal is manufactured to meet or exceed the fit, finish, and performance of the original equipment part it replaces, so the kit installs and seals the same way the OEM components did. It is designed as a direct cross to Mercury\/Chrysler service number 26-85090A2, making it straightforward to identify against an existing parts diagram or an old seal kit box. As with any gearcase reseal, use the round shape and included seals in the positions specified for your particular lower unit, and always fill and check gear lubricant after reassembly to confirm the seal job holds under pressure.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2624\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Gearcase Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Oil Seal (Sierra 18-0579)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282243678\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits applications using Mercury\/Chrysler lower unit seal number 26-85090A2.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e26-85090A2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2624 Lower Unit Seal Kit fit?\u003c\/strong\u003e The Sierra 18-2624 Lower Unit Seal Kit is designed as a direct replacement for Mercury\/Chrysler lower unit seal number 26-85090A2, making it suited to gearcases originally sealed with that OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-2624 cross to?\u003c\/strong\u003e Sierra 18-2624 crosses to OEM number 26-85090A2, so you can match it against that number on an existing parts diagram or old seal kit packaging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-2624 kit?\u003c\/strong\u003e The kit contains the oil seal (Sierra part 18-0579) along with the other seal components needed to reseal the lower unit gearcase in a single job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2624 seal kit weigh?\u003c\/strong\u003e This Sierra lower unit seal kit weighs 0.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape and color are the seals in this kit?\u003c\/strong\u003e The seals in the Sierra 18-2624 kit are round and white in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2624 equivalent to the original Mercury seal kit?\u003c\/strong\u003e Yes, Sierra manufactures the 18-2624 kit to meet or exceed the quality of the original equipment seal kit it replaces, specifically OEM number 26-85090A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many kits come in one order of 18-2624?\u003c\/strong\u003e One order of Sierra 18-2624 includes a single seal kit, listed as a unit count of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2624 kit genuine Sierra or aftermarket?\u003c\/strong\u003e The 18-2624 is a Sierra-branded aftermarket seal kit engineered to meet or exceed OEM specifications for the 26-85090A2 lower unit seal it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace the lower unit seals on my outboard?\u003c\/strong\u003e Lower unit seals lose their sealing set over time and use, which can let gear lubricant leak out or water intrude into the gearcase; the Sierra 18-2624 kit provides the seal components to reseal the unit and prevent that contamination.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat should I do after installing the Sierra 18-2624 seal kit?\u003c\/strong\u003e After installing the seals from the 18-2624 kit, refill the gearcase with the correct gear lubricant and check for leaks to confirm the reseal is holding.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2624 kit include the oil seal separately or as part of the set?\u003c\/strong\u003e The oil seal, Sierra part 18-0579, is included as one of the components within the 18-2624 lower unit seal kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2624 seal kit?\u003c\/strong\u003e The UPC for the Sierra 18-2624 Lower Unit Seal Kit is 808282243678.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108194011,"sku":"SIE-18-2624","price":70.39,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2624_lg__93654.1558122984.500.750.jpg?v=1785189150"},{"product_id":"sierra-18-2646-1-lower-unit-seal-kit-for-mercruiser-alpha-one-gen-ii-sterndrive-replaces-26-816575a3","title":"Sierra 18-2646-1 Lower Unit Seal Kit for Alpha One Gen II Sterndrives","description":"\u003cp\u003eThe Sierra 18-2646-1 Lower Unit Seal Kit is a complete, single-package seal kit engineered for Alpha One Gen II sterndrives, including the Alpha One Gen II (CR) variant. It is built to reseal the lower unit during a gearcase rebuild or when addressing gear lube leaks, restoring a proper seal against water intrusion and lubricant loss. The kit ships as one count per package, so the full set of lower unit seals needed for the job is included together rather than sold as loose individual seals. Components in the kit are round in shape with a white finish. Sierra backs this kit, like all Sierra parts, with its customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003eThis kit is specific to the Alpha One Gen II family and covers a broad span of production serial numbers, from early 1991-1995 units through 1998-2010 units. It is not the correct kit for the earlier Alpha One SS or for Bravo I\/Bravo II sterndrives, which use different Sierra kit numbers.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2646-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Alpha One Gen II and Alpha One Gen II (CR) sterndrives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 kit per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.23 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282258016\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAlpha One Gen II, 1991-1995, serial number D469859 through F679999\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II (CR), 1991-1995, serial number D469859 through F679999\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II, 1996-1997, serial number F680000 through K999999\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II (CR), 1996-2010, serial number F680000 and up\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II, 1998-2010, serial number L100040 and up\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2646-1 Lower Unit Seal Kit include?\u003c\/strong\u003e The Sierra 18-2646-1 is packaged as a single complete lower unit seal kit, one kit per package, rather than as individual loose seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich sterndrives does Sierra 18-2646-1 fit?\u003c\/strong\u003e Sierra 18-2646-1 fits Alpha One Gen II and Alpha One Gen II (CR) sterndrives, covering serial ranges from D469859 through L100040 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2646-1 fit the Alpha One SS?\u003c\/strong\u003e No. The Alpha One SS (1986-1989) uses a different Sierra seal kit, 18-2652, so the Sierra 18-2646-1 kit is not the correct part for that drive.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-2646-1 fit a Bravo I or Bravo II sterndrive?\u003c\/strong\u003e No, Bravo I and Bravo II sterndrives use a different Sierra kit, 18-2645, not the 18-2646-1 kit which is built specifically for Alpha One Gen II drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat serial number range does 18-2646-1 cover on early Alpha One Gen II units?\u003c\/strong\u003e For 1991-1995 Alpha One Gen II and Alpha One Gen II (CR) drives, the Sierra 18-2646-1 kit covers serial number D469859 through F679999.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a different kit needed for later Alpha One Gen II sterndrives?\u003c\/strong\u003e No, the same Sierra 18-2646-1 kit also covers 1996-1997 units (serial F680000 through K999999), 1996-2010 CR units (serial F680000 and up), and 1998-2010 units (serial L100040 and up).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2646-1 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2646-1 Lower Unit Seal Kit weighs 0.23 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2646-1 a genuine Sierra part with a warranty?\u003c\/strong\u003e Yes, the 18-2646-1 kit is a genuine Sierra part and, like all Sierra parts, is covered under Sierra's customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and shape are the components in kit 18-2646-1?\u003c\/strong\u003e The seal components in the Sierra 18-2646-1 kit are round and finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many of these kits come in a package?\u003c\/strong\u003e Sierra 18-2646-1 ships as a single unit, one complete seal kit per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2646-1 cover both the standard and CR versions of the Alpha One Gen II?\u003c\/strong\u003e Yes, the Sierra 18-2646-1 kit is listed for both the standard Alpha One Gen II and the Alpha One Gen II (CR) across the covered serial ranges.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108226779,"sku":"SIE-18-2646-1","price":48.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2646-1_lg__19871.1558124217.500.750.jpg?v=1785188130"},{"product_id":"upper-unit-seal-kit-for-mercruiser-alpha-one-gen-ii-stern-drive-1991-up-replaces-26-88397a1","title":"Sierra Upper Unit Seal Kit 18-2644 - Replaces 26-88397A1 - Mercruiser Alpha I Generation II Stern Drive","description":"\u003cp\u003eThe Sierra 18-2644 Upper Unit Seal Kit supplies the seals and gaskets needed to properly rebuild the upper gear housing on a Mercruiser Alpha I Generation II stern drive. This kit replaces OEM number 26-88397A1 and is engineered to meet or exceed the specifications of the original equipment part it replaces. Sierra supplies many OEM engine manufacturers and boat builders with quality marine parts, and this seal kit is built to stand up to the harsh marine environment while sealing the upper unit against water intrusion and lubricant loss.\u003c\/p\u003e\u003cp\u003eThe kit contains a Seal Gasket (Sierra 18-2944, OE 26-45577-1) and a Drain Screw Gasket (Sierra 18-2945, OE 12-19183-3), each supplied in a quantity of 1, giving the installer the correct sealing components for an upper unit service or rebuild in one package. Using a complete seal kit at rebuild time helps prevent water intrusion into the gear housing and lubricant leaks that can lead to premature gear and bearing wear.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2644\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Upper Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.14 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999875211\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Seal Gasket (18-2944, OE 26-45577-1), qty 1; Drain Screw Gasket (18-2945, OE 12-19183-3), qty 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser Alpha I Generation II stern drive\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e26-88397A1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2644 Upper Unit Seal Kit fit?\u003c\/strong\u003e The 18-2644 kit is designed for the Mercruiser Alpha I Generation II stern drive upper gear housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-2644 replace?\u003c\/strong\u003e Sierra 18-2644 replaces OEM number 26-88397A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2644 seal kit?\u003c\/strong\u003e The kit includes a Seal Gasket (Sierra 18-2944, OE 26-45577-1) and a Drain Screw Gasket (Sierra 18-2945, OE 12-19183-3), one of each.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2644 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2644 Upper Unit Seal Kit weighs 0.14 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2644 kit genuine OEM or aftermarket?\u003c\/strong\u003e It is a Sierra aftermarket replacement kit engineered to meet or exceed the specifications of the original 26-88397A1 equipment it replaces, not a Mercruiser branded OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the upper unit seal kit on my stern drive?\u003c\/strong\u003e The 18-2644 kit is intended for use during a rebuild or service of the Alpha I Generation II upper gear housing, whenever the existing seals and gaskets are removed or show signs of wear or leakage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-2644 kit's gasket material?\u003c\/strong\u003e The gasket material included in the 18-2644 kit is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2644 kit include a drain screw gasket?\u003c\/strong\u003e Yes, the kit includes Sierra 18-2945, a drain screw gasket with OE reference 12-19183-3, in a quantity of one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the seal gasket in the 18-2644 kit?\u003c\/strong\u003e The seal gasket included in the Sierra 18-2644 kit is round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-2644 kit on a different stern drive model?\u003c\/strong\u003e The 18-2644 kit is specified for the Mercruiser Alpha I Generation II upper unit; fitment to other stern drive models is not listed for this part.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108259547,"sku":"SIE-18-2644","price":36.24,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2644_lg__34869.1558124107.500.750.jpg?v=1785188029"},{"product_id":"lower-unit-seal-kit-for-mercruiser-bravo-i-ii-iii-sterndrives-replaces-26-76868a1-sierra-18-2645-1","title":"Sierra Lower Unit Seal Kit 18-2645-1, Replaces 26-76868A1, Fits Mercruiser Bravo I, II and III","description":"\u003cp\u003eThe Sierra Lower Unit Seal Kit, part number 18-2645-1, is a complete gasket and seal set for rebuilding the lower gear housing on Mercruiser Bravo I, II, and III stern drive units. Instead of sourcing individual gaskets and seals separately, this kit bundles the three components needed for a proper lower unit reseal into one part number, helping ensure nothing is missed during a rebuild or seal replacement job.\u003c\/p\u003e\u003cp\u003eThe kit contains a gear housing drain screw gasket (OE 12-19183, quantity 2), a water pocket cover gasket (OE 27-55810, quantity 1), and an oil seal (OE 26-823894). These components are cross-referenced to fit in place of the original Mercruiser parts and are commonly needed together whenever the lower unit is opened up for service, such as during a water pump replacement, gear lube change with inspection, or general lower unit maintenance.\u003c\/p\u003e\u003cp\u003eThis kit is designed specifically for Bravo I, II, and III model stern drives and carries OEM cross-reference numbers 26-76868A1, 26-76868A2, and 26-76868A04, so it can be matched against those Mercruiser part numbers when confirming fitment. The kit weighs 0.42 pounds as packaged.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2645-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercruiser Bravo I, II \u0026amp; III Models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 26-76868A1, 26-76868A2, 26-76868A04\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Gear Housing Drain Screw Gasket (OE 12-19183, Qty 2), Water Pocket Cover Gasket (OE 27-55810, Qty 1), Oil Seal (OE 26-823894)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.42 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 1.5 x 6 x 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282383237\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser Bravo I, II \u0026amp; III Models\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e26-76868A1\u003c\/li\u003e\n\u003cli\u003e26-76868A2\u003c\/li\u003e\n\u003cli\u003e26-76868A04\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2645-1 lower unit seal kit fit?\u003c\/strong\u003e This kit is designed for Mercruiser Bravo I, II, and III model stern drives and is used when servicing the lower gear housing on those units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does 18-2645-1 replace?\u003c\/strong\u003e The kit cross-references to Mercruiser OEM numbers 26-76868A1, 26-76868A2, and 26-76868A04, so it can be used in place of any of those part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2645-1 kit?\u003c\/strong\u003e Three components are included: a gear housing drain screw gasket (OE 12-19183, quantity 2), a water pocket cover gasket (OE 27-55810, quantity 1), and an oil seal (OE 26-823894).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many drain screw gaskets come in the kit?\u003c\/strong\u003e Two gear housing drain screw gaskets (OE 12-19183) are included in the 18-2645-1 kit, along with one water pocket cover gasket and one oil seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2645-1 seal kit weigh?\u003c\/strong\u003e The kit weighs 0.42 pounds as packaged.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of this kit?\u003c\/strong\u003e The Sierra 18-2645-1 lower unit seal kit measures 1.5 x 6 x 6 inches as packaged.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this an aftermarket or genuine Mercruiser part?\u003c\/strong\u003e 18-2645-1 is a Sierra-brand replacement kit manufactured to match the fit of the original Mercruiser components it cross-references, rather than a Mercruiser-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the seals in this kit?\u003c\/strong\u003e These gaskets and the oil seal are typically replaced whenever the lower gear housing on a Bravo I, II, or III drive is opened for service, such as during a rebuild or water pump job, to ensure a proper seal is maintained.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit work on Bravo I, II, and III drives interchangeably?\u003c\/strong\u003e Yes, the Sierra 18-2645-1 kit is listed for Bravo I, II, and III model stern drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2645-1 kit?\u003c\/strong\u003e The UPC for this Lower Unit Seal Kit is 808282383237.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108292315,"sku":"SIE-18-2645-1","price":119.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2645-1__51233.1737875437.500.750.jpg?v=1785188896"},{"product_id":"sierra-18-2653-lower-unit-seal-kit-replaces-mercury-26-55682a1-for-mercury-mariner-outboards","title":"Sierra 18-2653 Lower Unit Seal Kit, Replaces 26-55682A1, for Mercury\/Mariner Outboard Gearcase","description":"\u003cp\u003eThe Sierra 18-2653 Lower Unit Seal Kit is a gearcase reseal kit engineered for Mercury and Mariner outboard motors, built to restore a watertight, oil-tight lower unit during a gearcase rebuild or seal service. Sierra manufactures the kit to meet or exceed the original equipment part it replaces, so it is a direct, reliable substitute when the OEM seal kit is no longer available or when a shop prefers a proven aftermarket source. The kit is supplied as a complete set of gearcase seals and includes a rubber grommet (Sierra part 18-3110, O.E.# 26-38970) among its components, so a technician has the pieces needed to reseal the lower unit in a single service rather than sourcing individual seals separately.\u003c\/p\u003e\u003cp\u003eSierra parts are designed and tested to stand up to the harsh marine environment, resisting the effects of saltwater, fuel, and gear lubricant exposure over the life of the gearcase. This seal kit is intended for outboard owners, marine technicians, and repair shops performing lower unit maintenance, gearcase overhauls, or troubleshooting a leaking gearcase on Mercury and Mariner outboard motors.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2653\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury\/Mariner outboard motor gearcase\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.28 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312648\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Component:\u003c\/strong\u003e Grommet, Sierra 18-3110 (O.E.# 26-38970), Qty 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury outboard motors\u003c\/li\u003e\n\u003cli\u003eMariner outboard motors\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e26-55682A1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2653 Lower Unit Seal Kit include?\u003c\/strong\u003e The kit includes the gearcase seals needed to reseal a Mercury or Mariner outboard lower unit, including a rubber grommet (Sierra 18-3110, O.E.# 26-38970) as one of its components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboard motors is part number 18-2653 designed for?\u003c\/strong\u003e This seal kit is designed for Mercury and Mariner outboard motor lower units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2653 replace OEM part 26-55682A1?\u003c\/strong\u003e Yes, Sierra 18-2653 directly replaces OEM number 26-55682A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2653 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2653 Lower Unit Seal Kit weighs 0.28 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material are the seals made from?\u003c\/strong\u003e The seals in kit 18-2653 are made of rubber.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-2653 seal kit?\u003c\/strong\u003e The components in this kit are white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2653 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e 18-2653 is a Sierra aftermarket part manufactured to meet or exceed the original equipment part it replaces, rather than a Mercury-branded OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to install the 18-2653 seal kit?\u003c\/strong\u003e This kit is used during a lower unit gearcase rebuild or reseal service on a Mercury\/Mariner outboard, such as when old seals are worn, leaking, or being replaced preventively.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the shape of the seal components in this kit?\u003c\/strong\u003e The seal components included in the Sierra 18-2653 kit are round.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the grommet included in 18-2653 a separate purchasable part?\u003c\/strong\u003e Yes, the grommet included in this kit is also sold individually as Sierra part 18-3110, with O.E.# 26-38970.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2653 Lower Unit Seal Kit?\u003c\/strong\u003e The UPC for this kit is 030999312648.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108357851,"sku":"SIE-18-2653","price":86.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2653_lg__35625.1558124454.500.750.jpg?v=1785188649"},{"product_id":"sierra-18-2648-upper-unit-seal-kit-for-mercruiser-1-alpha-one-drives-replaces-mercury-26-32511a1","title":"Sierra Upper Unit Seal Kit 18-2648, Replaces Mercury Marine 26-32511A1, MerCruiser Alpha One","description":"\u003cp\u003eThe Sierra 18-2648 Upper Unit Seal Kit supplies the seals needed to rebuild the upper gear housing on MerCruiser stern drive units. It is designed for the 888, 228, 250, and 260 stern drives as well as the MR Alpha One, Alpha One SS, and Alpha One Gen II drive families, covering multiple serial number ranges across those unit generations. The kit is used during a gear housing rebuild or seal replacement service, restoring the upper unit's ability to hold gear lubricant and keep water out of the drive, which protects the gears and bearings from corrosion and premature wear. This kit is a direct equivalent for Mercury Marine part number 26-32511A1, so it installs in place of the original equipment seal set without modification. As a kit, it bundles the seal components needed for the upper unit service in a single part number, saving the buyer from having to source individual seals separately. Because MerCruiser drive designs changed across model years and serial number breakpoints, always confirm the drive model and serial number against the fitment list below before ordering to be sure the 18-2648 kit matches the unit being serviced.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2648\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Upper Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Upper Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999755810\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.22 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 26-32511A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e888 \/ 228 \/ 250 \/ 260, 1977-1982, serial number 4782330 to 6225576\u003c\/li\u003e\n\u003cli\u003eR, 1983, serial number 6225577 and up\u003c\/li\u003e\n\u003cli\u003eMR Alpha One, 1984-1990, serial number 6225577 to D469858\u003c\/li\u003e\n\u003cli\u003eMR Alpha One (CR), 1984-1990, serial number 6225577 to D469858\u003c\/li\u003e\n\u003cli\u003eAlpha One SS, 1986-1989, serial number A545004 and up\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II, 1991-1995, serial number D469859 to F679999\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II (CR), 1991-1995, serial number D469859 to F679999\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II, 1996-1997, serial number F680000 to K999999\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II (CR), 1996-2010, serial number F680000 and up\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 26-32511A1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2648 Upper Unit Seal Kit fit?\u003c\/strong\u003e The 18-2648 kit fits MerCruiser 888, 228, 250, and 260 stern drives from 1977-1982, plus the MR Alpha One, Alpha One SS, and Alpha One Gen II drive families across specific serial number ranges, from serial number 4782330 up through the F680000-and-up range depending on the model.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2648 kit the same as Mercury Marine 26-32511A1?\u003c\/strong\u003e Yes, Sierra part number 18-2648 is a direct equivalent to Mercury Marine part number 26-32511A1 and installs in its place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2648 Upper Unit Seal Kit weigh?\u003c\/strong\u003e The Sierra 18-2648 Upper Unit Seal Kit weighs 0.22 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2648 kit?\u003c\/strong\u003e The kit includes the seal set needed to service the upper gear housing on the applicable MerCruiser drive, packaged as a single Upper Unit Seal Kit under part number 18-2648.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-2648 fit an Alpha One SS drive?\u003c\/strong\u003e Yes, the 18-2648 kit fits the Alpha One SS drive for the 1986-1989 model years, serial number A545004 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the serial number matter when ordering this seal kit?\u003c\/strong\u003e Yes, because MerCruiser drive designs changed across production, the 18-2648 kit applies to specific serial number ranges within each model, so the drive's serial number should be checked against the fitment list to confirm this is the correct kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-2648 for the upper or lower gear housing?\u003c\/strong\u003e The 18-2648 kit is specifically for the upper unit (upper gear housing), not the lower unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2648 fit the Alpha One Gen II drive?\u003c\/strong\u003e Yes, the 18-2648 kit covers the Alpha One Gen II drive for 1991-1995 and 1996-1997, as well as the Alpha One Gen II (CR) variant for 1991-1995 and 1996-2010.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2648 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e Sierra 18-2648 is an aftermarket seal kit manufactured as a direct replacement for the Mercury Marine OEM part 26-32511A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this kit be used on the 888, 228, 250, or 260 stern drive models?\u003c\/strong\u003e Yes, part number 18-2648 is listed for the 888, 228, 250, and 260 stern drives for the 1977-1982 model years, serial number range 4782330 to 6225576.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108390619,"sku":"SIE-18-2648","price":25.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2648_lg__60355.1558124274.500.750.jpg?v=1785188689"},{"product_id":"sierra-18-2655-lower-unit-seal-kit-replaces-mercury-26-89238a2-for-mercury-mariner-135-200-hp-v-6-outboards","title":"Sierra Lower Unit Seal Kit 18-2655, Replaces 26-89238A2, Fits Mercury\/Mariner V-6 135\/150 \u0026 175\/200 Outboards","description":"\u003cp\u003eThe Sierra 18-2655 is a lower unit seal kit built to reseal the gearcase on Mercury\/Mariner V-6 outboards. It fits 135\/150 V-6 outboards with serial number 0A904646 and newer, and 175\/200 V-6 outboards with serial number 6618751 and newer. The kit is designed as a direct replacement for Mercury Marine OEM part 26-89238A2, giving boat owners and technicians a straightforward way to restore the lower unit seal without sourcing individual OEM components.\u003c\/p\u003e\u003cp\u003eInside the kit is a bushing gasket (Sierra 18-2155, OEM equivalent 23-77631A2), supplied in a quantity of one, so the correct gasket is on hand when the gearcase is opened up for service. The kit ships in white and is compact, weighing 0.28 pounds, making it easy to store in a parts bin or take along for on-water repairs. As with other Sierra parts, it is backed by Sierra's customer satisfaction warranty, giving buyers confidence in fit and quality when servicing these Mercury\/Mariner V-6 lower units.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2655\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Gearcase Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Bushing gasket (Sierra 18-2155), Qty 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 26-89238A2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.28 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312662\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Universal Fit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury\/Mariner 135\/150 V-6 (serial number 0A904646 and newer)\u003c\/li\u003e\n\u003cli\u003eMercury\/Mariner 175\/200 V-6 (serial number 6618751 and newer)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e26-89238A2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2655 Lower Unit Seal Kit fit?\u003c\/strong\u003e The 18-2655 fits Mercury\/Mariner 135\/150 V-6 outboards with serial number 0A904646 and newer, and 175\/200 V-6 outboards with serial number 6618751 and newer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2655 an OEM replacement?\u003c\/strong\u003e Yes, it replaces Mercury Marine OEM part 26-89238A2 and is designed to match the original lower unit seal kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the Sierra 18-2655 kit?\u003c\/strong\u003e One bushing gasket, Sierra part 18-2155 with OEM equivalent 23-77631A2, supplied in a quantity of one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this seal kit weigh?\u003c\/strong\u003e The Sierra 18-2655 Lower Unit Seal Kit weighs 0.28 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-2655 kit?\u003c\/strong\u003e It measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-2655 kit?\u003c\/strong\u003e The kit is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2655 come with a warranty?\u003c\/strong\u003e Yes, the 18-2655 is covered under Sierra's customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm the 18-2655 fits my outboard?\u003c\/strong\u003e Check your outboard's serial number against the fitment ranges: 135\/150 V-6 at 0A904646 and newer, or 175\/200 V-6 at 6618751 and newer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2655?\u003c\/strong\u003e The UPC is 030999312662.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-2655 be used on both 135\/150 and 175\/200 Mercury\/Mariner V-6 outboards?\u003c\/strong\u003e Yes, the 18-2655 kit covers both the 135\/150 V-6 (0A904646 and newer) and 175\/200 V-6 (6618751 and newer) engine families.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108423387,"sku":"SIE-18-2655","price":58.35,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2655_lg__27310.1558124596.500.750.jpg?v=1785189164"},{"product_id":"sierra-18-2658-lower-unit-gear-housing-seal-kit-replaces-omc-396351-johnson-evinrude-40-48-50-hp-1989-2003-50-75-hp-3-cyl-1979-2003","title":"Sierra 18-2658 Lower Unit Seal Kit for Johnson\/Evinrude Outboard Motor, Replaces 396351","description":"\u003cp\u003eThe Sierra 18-2658 Lower Unit Seal Kit is a complete gear housing reseal kit for Johnson\/Evinrude outboard motors, built to meet or exceed original equipment quality. Lower unit seals wear out from heat cycling and constant contact with gear lube and water, and a failed seal lets gear lube leak out or water intrude into the gear case, leading to corrosion and gear damage. This kit bundles the parts needed to reseal the lower unit in one purchase rather than sourcing each seal separately.\u003c\/p\u003e\u003cp\u003eInside the kit you get an impeller plate gasket (Sierra 18-0124, OE 325537, qty 1) and oil seals (Sierra 18-2026, OE 321453, qty 2), giving you the gasket and seal set most commonly needed during a lower unit rebuild or water pump service on applicable Johnson\/Evinrude outboards. Because fit is engine-specific, confirm your outboard's part numbers against this kit before ordering.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2658\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Gear Housing Seal Kits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Impeller Plate Gasket (18-0124, OE 325537, qty 1); Oil Seal (18-2026, OE 321453, qty 2)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.17 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312693\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFor Johnson\/Evinrude outboard motors.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e396351\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2658 Lower Unit Seal Kit include?\u003c\/strong\u003e The kit includes an impeller plate gasket (Sierra 18-0124, OE 325537, qty 1) and oil seals (Sierra 18-2026, OE 321453, qty 2), giving you the gasket and seal set for resealing the lower unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat outboard motors is the 18-2658 seal kit for?\u003c\/strong\u003e Sierra 18-2658 is built for Johnson\/Evinrude outboard motors that use OEM part 396351.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2658 replace OEM part 396351?\u003c\/strong\u003e Yes, Sierra 18-2658 replaces OEM number 396351.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many oil seals come in the kit?\u003c\/strong\u003e Two oil seals (Sierra 18-2026, OE 321453) are included in the 18-2658 kit, along with one impeller plate gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or aftermarket?\u003c\/strong\u003e The 18-2658 Lower Unit Seal Kit is a Sierra-branded part manufactured to meet or exceed original equipment quality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2658 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2658 kit weighs 0.17 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and shape are the seals in this kit?\u003c\/strong\u003e The components in Sierra kit 18-2658 are white and round.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this kit for a water pump service on my outboard?\u003c\/strong\u003e Yes, the impeller plate gasket and oil seals in the 18-2658 kit are commonly needed parts during lower unit and water pump service on applicable Johnson\/Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm the 18-2658 kit fits my outboard?\u003c\/strong\u003e Check that your outboard's lower unit calls for OEM part 396351, since Sierra 18-2658 is fit specific and replaces that number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2658 kit?\u003c\/strong\u003e The UPC for Sierra 18-2658 is 030999312693.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108456155,"sku":"SIE-18-2658","price":48.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2658_lg__20132.1558124822.500.750.jpg?v=1785189150"},{"product_id":"lower-unit-gear-housing-seal-kit-26-33144a2-for-mercruiser-alpha-one-mr-r-stern-drives-sierra-18-2652-replaces-43-803091t1","title":"Sierra Lower Unit Seal Kit 18-2652 for Mercruiser Alpha One, Alpha One SS, MR, R Stern Drives (Replaces 26-33144A2)","description":"\u003cp\u003eThe Sierra 18-2652 Lower Unit Seal Kit is a gear housing seal set built for Mercruiser stern drive lower units, covering the IA\/IB\/IC and EZ Shift, MC-I, R, MR, Alpha One, Alpha One SS, and Alpha One Gen II drive families. The kit is machined to precise tolerances so the seals seat correctly in the lower gear housing bore, helping maintain the gear lube seal that keeps water out of the drive and gear oil in. It is used during lower unit rebuilds, gear housing seal replacement, and general stern drive maintenance whenever the lower unit is opened up for service. Sierra manufactures the kit to meet or exceed the original equipment part it replaces, and it is designed to be interchangeable with GLM, Mallory, and Mercruiser OEM seal part numbers, so it drops into the same lower unit application without modification. Because it is a small, precision-machined component, proper installation depth and orientation matter for a leak-free seal, so it should be installed following the stern drive manufacturer's lower unit service procedure. This kit is intended for the specific Mercruiser drive models and year ranges listed below; confirm your drive model and serial number range before ordering to ensure correct fit.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2652\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Lower Gear Housing Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.28 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312631\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercruiser IA\/IB\/IC and EZ Shift, MC-I, R, MR, Alpha One, Alpha One SS, Alpha One Gen II stern drives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e GLM 87510, Mallory 9-74304, Mercruiser 26-89238A1, 26-33144A1, 26-33144A2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e888 \/ 228 \/ 250 \/ 260, 1977-1982\u003c\/li\u003e\n\u003cli\u003eR, 1983\u003c\/li\u003e\n\u003cli\u003eMR, Alpha One, 1984-1990\u003c\/li\u003e\n\u003cli\u003eAlpha One SS, 1986-1989\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II, 1991-1995\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II, 1996-1997\u003c\/li\u003e\n\u003cli\u003eAlpha One Gen II (CR), 1996-2010\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 87510\u003c\/li\u003e\n\u003cli\u003eMallory 9-74304\u003c\/li\u003e\n\u003cli\u003eMercruiser 26-89238A1\u003c\/li\u003e\n\u003cli\u003eMercruiser 26-33144A1\u003c\/li\u003e\n\u003cli\u003eMercruiser 26-33144A2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2652 Lower Unit Seal Kit fit?\u003c\/strong\u003e The 18-2652 kit fits Mercruiser IA\/IB\/IC and EZ Shift, MC-I, R, MR, Alpha One, Alpha One SS, and Alpha One Gen II stern drive lower units, covering model years from 1977 through 2010 depending on the specific drive and serial number range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2652 kit compatible with Alpha One Gen II drives?\u003c\/strong\u003e Yes, Sierra 18-2652 is listed for Alpha One Gen II drives built for the 1991-1995 and 1996-1997 model years, as well as the Alpha One Gen II (CR) configuration covering 1996-2010.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-2652 seal kit replace?\u003c\/strong\u003e It is designed to be interchangeable with GLM 87510, Mallory 9-74304, and Mercruiser 26-89238A1, 26-33144A1, and 26-33144A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2652 cross-reference to a Mercury Marine part number?\u003c\/strong\u003e Yes, the Sierra 18-2652 Lower Unit Seal Kit cross-references to Mercury Marine 26-33144A2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2652 seal kit weigh?\u003c\/strong\u003e The kit weighs 0.28 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-2652 seal kit?\u003c\/strong\u003e The Sierra 18-2652 kit measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-2652 fit a 1983 MC-I drive?\u003c\/strong\u003e Yes, the R model 1983 application (serial numbers 6225577 and up) is covered by the Sierra 18-2652 lower unit seal kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2652 a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e It is a genuine Sierra-manufactured part, made to meet or exceed the specifications of the original equipment seal it replaces, and it carries Sierra's standard customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-2652 seal kit have?\u003c\/strong\u003e The Sierra 18-2652 Lower Unit Seal Kit has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to install the 18-2652 seal kit?\u003c\/strong\u003e This kit is used when servicing the lower gear housing on a compatible Mercruiser stern drive, such as during a lower unit rebuild or when gear lube seals need replacing to stop water intrusion or oil leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2652 kit fit the Alpha One SS drive?\u003c\/strong\u003e Yes, Sierra 18-2652 is listed for the Alpha One SS drive covering the 1986-1989 model years, serial numbers A545004 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2652 Lower Unit Seal Kit?\u003c\/strong\u003e The UPC for this product is 030999312631.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108488923,"sku":"SIE-18-2652","price":55.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2652_lg__79248.1722514186.500.750.jpg?v=1785188029"},{"product_id":"sierra-18-2656-lower-unit-seal-kit-replaces-omc-396350-for-johnson-evinrude-outboards-up-to-225-hp","title":"Sierra 18-2656 Lower Unit Seal Kit, Replaces OMC 396350, for Johnson\/Evinrude Outboard Motor","description":"\u003cp\u003eThe Sierra 18-2656 Lower Unit Seal Kit is a gear housing reseal kit built for Johnson\/Evinrude outboard motors, engineered to meet or exceed original equipment quality. The kit contains the oil seals needed to reseal the lower unit gear case, helping keep gear lube inside and water out during service or after a lower unit rebuild. It is designed as a direct equivalent to the original equipment part it replaces, so installation and fit match the OEM component it is servicing.\u003c\/p\u003e\u003cp\u003eInside the kit are two individual oil seals: part 18-2025 (O.E. 318971) and part 18-2028 (O.E. 321480), covering the seal points typically required for a complete lower unit reseal on applicable Johnson\/Evinrude outboards. The kit is finished in white and uses aluminum in its construction. This is a service kit intended for technicians and DIY boat owners performing lower unit maintenance, gear seal replacement, or a full lower unit teardown and rebuild.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2656\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Oil Seal 18-2025 (O.E. 318971), Oil Seal 18-2028 (O.E. 321480)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.11 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312679\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Use:\u003c\/strong\u003e Seal kit for Johnson\/Evinrude outboard motor\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude outboard motors\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e396350\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2656 Lower Unit Seal Kit fit?\u003c\/strong\u003e The Sierra 18-2656 is a lower unit seal kit designed for Johnson\/Evinrude outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-2656 replace?\u003c\/strong\u003e The 18-2656 kit replaces OEM number 396350 on applicable Johnson\/Evinrude outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2656 kit?\u003c\/strong\u003e The kit contains two oil seals: part 18-2025 (O.E. 318971) and part 18-2028 (O.E. 321480).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2656 an aftermarket or genuine OEM part?\u003c\/strong\u003e It is an aftermarket seal kit, built to meet or exceed the quality of the original equipment seal kit it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material are the seals made of?\u003c\/strong\u003e The 18-2656 kit uses aluminum in its construction.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2656 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2656 Lower Unit Seal Kit weighs 0.11 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-2656 kit?\u003c\/strong\u003e The kit is finished in white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need this seal kit?\u003c\/strong\u003e This kit is used when resealing the lower unit gear case during service, gear seal replacement, or a full lower unit rebuild on a Johnson\/Evinrude outboard.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there other seal kits that cross to the same OEM number?\u003c\/strong\u003e Yes, the 18-2656 is cross-referenced to the same OEM 396350 seal application as GLM 87602 and Mallory 9-74100.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2656?\u003c\/strong\u003e The UPC for the Sierra 18-2656 Lower Unit Seal Kit is 030999312679.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2656 kit include installation hardware or gaskets?\u003c\/strong\u003e The kit includes the two oil seals (18-2025 and 18-2028); no additional hardware is listed as included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this kit specific to one lower unit or a range of models?\u003c\/strong\u003e The 18-2656 is a Johnson\/Evinrude outboard lower unit seal kit; confirm your outboard's gear housing uses OEM seal 396350 before ordering.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108521691,"sku":"SIE-18-2656","price":39.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2656_lg__74458.1558124651.500.750.jpg?v=1785188544"},{"product_id":"sierra-18-2660-lower-unit-seal-kit-for-johnson-evinrude-outboards-replaces-oem-0396349-glm-87601-mallory-9-74103","title":"Sierra Lower Unit Seal Kit 18-2660, Replaces 396349, for Johnson\/Evinrude Outboard Motors","description":"\u003cp\u003eThe Sierra 18-2660 Lower Unit Seal Kit is a gear housing seal kit built for Johnson and Evinrude outboard motors. It supplies the oil seals needed to reseal the lower unit and prevent gear lube from escaping or water from entering the gear case, a common maintenance need any time the lower unit is opened up for service or after a water-intrusion issue is diagnosed. The kit contains two individually numbered oil seals: the 18-2059 oil seal (O.E. 321466) and the 18-2064 oil seal (O.E. 332205), each manufactured to meet or exceed the quality of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003eUsing the correct seal kit during a lower unit rebuild helps maintain a proper gear lube seal, which protects the gear case from corrosion and premature wear caused by water contamination. The kit is designed as a direct replacement for the original Johnson\/Evinrude part 396349, so it drops into the same lower unit assembly without modification. It is intended for outboard owners and marine technicians performing lower unit reseals, gear case rebuilds, or preventive maintenance on Johnson\/Evinrude outboards.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2660\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContains:\u003c\/strong\u003e 18-2059 Oil Seal (O.E. 321466), 18-2064 Oil Seal (O.E. 332205)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.22 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312716\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude outboard motors\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e396349\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2660 Lower Unit Seal Kit include?\u003c\/strong\u003e The kit includes two oil seals: an 18-2059 oil seal (O.E. 321466) and an 18-2064 oil seal (O.E. 332205), both intended for resealing the lower unit gear housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat outboard motors does the 18-2660 seal kit fit?\u003c\/strong\u003e This seal kit is designed for Johnson and Evinrude outboard motors that use the 396349 lower unit seal kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2660 a direct replacement for OEM part 396349?\u003c\/strong\u003e Yes, the 18-2660 kit replaces the original Johnson\/Evinrude part number 396349 and is built to meet or exceed the quality of the original equipment part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2660 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2660 Lower Unit Seal Kit weighs 0.22 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color are the seals in the 18-2660 kit?\u003c\/strong\u003e The seals in this kit are white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I install a lower unit seal kit like the 18-2660?\u003c\/strong\u003e A lower unit seal kit such as the 18-2660 should be installed any time the gear housing is opened for service, or when gear lube is found to be contaminated with water, indicating a failed seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the seals in the 18-2660 kit genuine OEM parts?\u003c\/strong\u003e No, the Sierra 18-2660 is an aftermarket seal kit manufactured to meet or exceed the quality of the original equipment seals it replaces, rather than being sourced from Johnson\/Evinrude directly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the shape of the oil seals in the 18-2660 kit?\u003c\/strong\u003e Both oil seals included in the Sierra 18-2660 kit are round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2660 kit include gaskets or just seals?\u003c\/strong\u003e The 18-2660 kit contains two oil seals, the 18-2059 and 18-2064, and does not list any gaskets as included components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2660 Lower Unit Seal Kit?\u003c\/strong\u003e The UPC for the Sierra 18-2660 Lower Unit Seal Kit is 030999312716.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108554459,"sku":"SIE-18-2660","price":51.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2660_lg__06158.1558124972.500.750.jpg?v=1785188504"},{"product_id":"lower-unit-seal-kit-for-evinrude-johnson-omc-outboards-replaces-oem-396355-sierra-18-2659","title":"Sierra Lower Unit Seal Kit 18-2659, Replaces OMC 396355, for Evinrude\/Johnson Outboard Gear Housings","description":"\u003cp\u003eThe Sierra 18-2659 Lower Unit Seal Kit is a gear housing seal kit for Evinrude\/Johnson (OMC) outboards, engineered to restore a watertight seal at the lower unit and prevent gearcase oil loss or water intrusion. It replaces OMC part number 396355 and is built as a complete kit so the impeller housing gasket and oil seal are replaced together during a lower unit service, rather than sourcing each component separately.\u003c\/p\u003e\u003cp\u003eThe kit contains two components matched to their original equipment specifications: an impeller housing gasket (Sierra 18-0969, O.E. 319586, qty. 1) that seals the water pump housing to the gearcase, and an oil seal (Sierra 18-2059, O.E. 321466, qty. 1) that keeps gear lubricant contained within the lower unit. Using the correct gasket and seal combination helps maintain proper water pump cooling and gearcase lubrication after a water pump impeller replacement or lower unit rebuild.\u003c\/p\u003e\u003cp\u003eThis kit is intended for technicians and boat owners performing routine lower unit maintenance or repair on applicable Evinrude\/Johnson outboard gear housings, and is sold as a single part number, 18-2659, covering both included components.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2659\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 396355\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.21 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312709\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents - Impeller Housing Gasket:\u003c\/strong\u003e Sierra 18-0969, O.E. 319586, Qty. 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents - Oil Seal:\u003c\/strong\u003e Sierra 18-2059, O.E. 321466, Qty. 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eEvinrude\/Johnson (OMC) outboard gear housings originally fitted with OMC part number 396355\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e396355\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2659 Lower Unit Seal Kit replace?\u003c\/strong\u003e It replaces OMC part number 396355, so any gear housing originally using that OMC number can use Sierra 18-2659 instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2659 kit?\u003c\/strong\u003e Two components ship together: an impeller housing gasket (Sierra 18-0969, O.E. 319586) and an oil seal (Sierra 18-2059, O.E. 321466), one of each.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-2659 kit is manufactured and sold under the Sierra brand, built to the original OMC 396355 specification rather than being a generic substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the seal kit weigh?\u003c\/strong\u003e The complete 18-2659 kit weighs 0.21 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit include a full gasket set or just the oil seal?\u003c\/strong\u003e It includes both an impeller housing gasket and an oil seal, not just a single seal, so both wear items are replaced in one kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat make of outboard is the 18-2659 kit designed for?\u003c\/strong\u003e This kit is designed for Evinrude\/Johnson (OMC) outboard gear housings that use OMC part number 396355.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use 18-2659 when replacing a water pump impeller?\u003c\/strong\u003e Yes, since the kit includes the impeller housing gasket (18-0969) along with the oil seal (18-2059), it covers the seal and gasket needs of a typical lower unit water pump service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this product?\u003c\/strong\u003e The Sierra 18-2659 Lower Unit Seal Kit has UPC 030999312709.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the individual components in this kit available separately?\u003c\/strong\u003e Within the 18-2659 kit, the impeller housing gasket is Sierra part 18-0969 and the oil seal is Sierra part 18-2059, each corresponding to its own O.E. Number (319586 and 321466 respectively).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-2659 fit a gear housing that lists O.E. Number 319586 or 321466?\u003c\/strong\u003e Yes, those are the O.E. Numbers for the two components inside the 18-2659 kit, the impeller housing gasket (319586) and the oil seal (321466).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many oil seals and gaskets come in one kit?\u003c\/strong\u003e One kit of Sierra 18-2659 contains one impeller housing gasket and one oil seal, quantity one each.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108587227,"sku":"SIE-18-2659","price":57.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2659_lg__09234.1558124907.500.750.jpg?v=1785188138"},{"product_id":"sierra-18-2671-lower-unit-seal-kit-replaces-omc-985612-fits-all-4-cyl-cobra-sterndrive-1986-1989","title":"Sierra Lower Unit Seal Kit 18-2671, Replaces OMC 985612, All 4 Cyl. Cobra (1986-89)","description":"\u003cp\u003eThe Sierra 18-2671 Lower Unit Seal Kit is a replacement seal kit engineered for the lower unit of All 4 cyl. Cobra (1986-89) sterndrives. This kit is built to meet or exceed the specifications of the original equipment seals it replaces, giving you a reliable way to restore the watertight and lubricant-tight integrity of the lower unit during a rebuild or seal replacement service. Lower unit seals are a wear item that harden and lose sealing ability over time, allowing gear lube to leak out or water to intrude into the gear case, so replacing them as a set during routine maintenance or after any lower unit service helps prevent gear case damage from lubricant loss or water contamination.\u003c\/p\u003e\u003cp\u003eSierra supplies parts to many OEM engine manufacturers and boat builders, and this kit is manufactured to be a direct fit for the specified application, cross-referencing to OEM part number 985612. It ships as a complete kit so you have the seals needed for the job in one part number, simplifying ordering versus sourcing individual seals separately.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2671\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e OMC Bellows and Transom Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e All 4 cyl. Cobra (1986-89)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.19 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e white\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312822\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 00030999312822\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eAll 4 cyl. Cobra (1986-89)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e985612\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2671 Lower Unit Seal Kit fit?\u003c\/strong\u003e The 18-2671 kit is designed for All 4 cyl. Cobra (1986-89) sterndrive lower units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2671 kit an OEM equivalent?\u003c\/strong\u003e Yes, Sierra part 18-2671 cross-references to OEM number 985612 and is manufactured to meet or exceed the original part's performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-2671 replace?\u003c\/strong\u003e It replaces OEM part number 985612.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2671 Lower Unit Seal Kit weigh?\u003c\/strong\u003e This kit weighs 0.19 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the lower unit seals be replaced?\u003c\/strong\u003e Lower unit seals like those in the 18-2671 kit should be replaced whenever the lower unit is serviced or rebuilt, or if gear lube leakage or water intrusion into the gear case is found.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if worn lower unit seals are not replaced?\u003c\/strong\u003e Worn seals can allow gear lubricant to leak out or water to enter the lower unit gear case, which can lead to gear case corrosion or component damage if not addressed with a kit such as the 18-2671.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit include all the seals needed for a lower unit rebuild?\u003c\/strong\u003e The 18-2671 is sold as a complete seal kit for the specified lower unit application, so the seals needed for that service are included in one part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-2671 seal kit?\u003c\/strong\u003e The seals in this kit are white in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2671 a genuine aftermarket replacement or a used part?\u003c\/strong\u003e The 18-2671 is a new aftermarket seal kit manufactured by Sierra, not a used or reconditioned part, and is built to meet or exceed OEM specifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the shape of the seals in the 18-2671 kit?\u003c\/strong\u003e The seals included in the 18-2671 kit are round in shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2671 covered under warranty?\u003c\/strong\u003e Yes, the 18-2671 Lower Unit Seal Kit is covered under Sierra's standard limited warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108619995,"sku":"SIE-18-2671","price":39.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2671_lg__52413.1558122654.500.750.jpg?v=1785188279"},{"product_id":"sierra-18-2654-lower-unit-seal-kit-replaces-mercury-26-79831a1-fits-mercury-mariner-70-75-80-90-hp-outboard-gearcase","title":"Sierra 18-2654 Lower Unit Seal Kit, Replaces 26-79831A1, for Mercury\/Mariner Outboard Motors","description":"\u003cp\u003eThe Sierra 18-2654 Lower Unit Seal Kit is a gearcase seal kit built to restore the watertight and oil-tight seal in the lower unit of Mercury and Mariner outboard motors. Lower unit seals wear over time and are a common source of gear lube leaks or water intrusion into the gearcase, both of which can lead to costly gearcase damage if left unaddressed. This kit supplies the key oil seal needed to reseal the lower unit during a rebuild or preventive maintenance service.\u003c\/p\u003e\u003cp\u003eThe kit is built around a round, white rubber seal component, engineered by Sierra to meet or exceed the fit and performance of the original equipment part it replaces. Sierra manufactures replacement marine parts to the same demands as high-horsepower engines see in the field, and supplies OEM engine manufacturers and boat builders with parts daily, so the 18-2654 kit is built to the same standard buyers expect from an original Mercury\/Mariner component.\u003c\/p\u003e\u003cp\u003eKit contents include the part number 18-2008 oil seal (O.E.# 26-56788, qty 1), the core sealing component of this lower unit kit. This kit replaces OEM part number 26-79831A1, so it is a direct fit for outboards originally fitted with that seal.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2654\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Gearcase Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.12 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312655\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e 18-2008 Oil Seal (O.E.# 26-56788), Qty 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury and Mariner outboard motors\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e26-79831A1\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2654 Lower Unit Seal Kit fit?\u003c\/strong\u003e The 18-2654 kit is designed for Mercury and Mariner outboard motors, replacing the OEM lower unit seal on those units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-2654 replace?\u003c\/strong\u003e Sierra part 18-2654 replaces OEM part number 26-79831A1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2654 kit?\u003c\/strong\u003e The kit contains one 18-2008 oil seal, which corresponds to O.E. Part number 26-56788, quantity one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the seal made from?\u003c\/strong\u003e The seal in the Sierra 18-2654 kit is made of rubber, formed in a round shape.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-2654 seal kit?\u003c\/strong\u003e The 18-2654 lower unit seal is white in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2654 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2654 Lower Unit Seal Kit weighs 0.12 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2654 a genuine Mercury part or aftermarket?\u003c\/strong\u003e The 18-2654 is a Sierra-brand aftermarket replacement, engineered to meet or exceed the performance of the original OEM part it replaces (26-79831A1), not a Mercury-branded original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the lower unit seal with kit 18-2654?\u003c\/strong\u003e This kit is used when the lower unit seal on a Mercury or Mariner outboard is worn or leaking, allowing gear lube to escape or water to enter the gearcase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2654 kit?\u003c\/strong\u003e The UPC for the Sierra 18-2654 Lower Unit Seal Kit is 030999312655.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes Sierra manufacture this seal kit to OEM engine manufacturer standards?\u003c\/strong\u003e Yes, Sierra supplies parts to OEM engine manufacturers and boat builders, and the 18-2654 kit is built to meet or exceed the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-2654 kit for other outboard brands besides Mercury and Mariner?\u003c\/strong\u003e The Sierra 18-2654 Lower Unit Seal Kit is specified for Mercury and Mariner outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the shape of the seal in kit 18-2654?\u003c\/strong\u003e The oil seal included in the Sierra 18-2654 kit is round in shape.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108652763,"sku":"SIE-18-2654","price":71.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2654_lg__56113.1722346545.500.750.jpg?v=1785187970"},{"product_id":"sierra-18-2673-upper-unit-seal-kit-replaces-omc-984459-fits-all-omc-cobra-sterndrive-1986-1989","title":"Sierra 18-2673 Upper Unit Seal Kit, Replaces 984459 986364 987603, for All Cobra (1986-89) OMC Sterndrive","description":"\u003cp\u003eThe Sierra 18-2673 Upper Unit Seal Kit is a seal set engineered for the upper gearcase unit on All Cobra (1986-89) OMC sterndrive applications. It is built to replace the OEM upper unit seals that wear out over time from heat, vibration, and constant exposure to water and gear lubricant, restoring a proper seal against water intrusion and lubricant loss in the upper drive unit. This kit is a direct cross-reference for OMC OEM part numbers 984459, 986364, and 987603, so it installs as a like-for-like replacement without modification to the drive unit.\u003c\/p\u003e\u003cp\u003eThis is a seal kit specifically for the upper unit of the sterndrive, distinct from the companion 18-2674 Transom Mount Seal Kit, which is a separate part number covering a different section of the drive. Ordering the correct kit for the section of the drive being serviced ensures the right seals are on hand for the job. The kit weighs 0.24 pounds as packaged.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2673\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Upper Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e OMC Bellows and Transom Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.24 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282258023\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 984459, 986364, 987603\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e All Cobra (1986-89)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eAll Cobra (1986-89) OMC Sterndrive\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e984459\u003c\/li\u003e\n\u003cli\u003e986364\u003c\/li\u003e\n\u003cli\u003e987603\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2673 Upper Unit Seal Kit fit?\u003c\/strong\u003e The Sierra 18-2673 Upper Unit Seal Kit fits All Cobra (1986-89) OMC sterndrive applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM part numbers does the 18-2673 replace?\u003c\/strong\u003e Sierra 18-2673 replaces OMC OEM part numbers 984459, 986364, and 987603.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2673 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2673 Upper Unit Seal Kit weighs 0.24 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2673 kit the same as the 18-2674 kit?\u003c\/strong\u003e No, 18-2673 is the Upper Unit Seal Kit while 18-2674 is the Transom Mount Seal Kit, a separate part number for a different section of the same Cobra sterndrive application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this kit work on any OMC sterndrive?\u003c\/strong\u003e The 18-2673 kit is designated for All Cobra (1986-89) applications; it is not listed as fitting other OMC sterndrive models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2673 a genuine OEM part or aftermarket?\u003c\/strong\u003e Sierra 18-2673 is a Sierra-branded replacement part manufactured as a cross-reference equivalent to OMC OEM numbers 984459, 986364, and 987603.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat section of the drive does the 18-2673 kit service?\u003c\/strong\u003e The 18-2673 kit contains seals for the upper unit (upper gearcase) of the Cobra sterndrive, as opposed to the transom mount section covered by 18-2674.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace these seals?\u003c\/strong\u003e Upper unit seals in the Cobra sterndrive wear from heat, vibration, and constant exposure to water and gear lubricant, and the 18-2673 kit provides the replacement seals needed to restore a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I order 18-2673 by its UPC code?\u003c\/strong\u003e Yes, the Sierra 18-2673 Upper Unit Seal Kit carries UPC 808282258023.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2673 kit include installation instructions?\u003c\/strong\u003e The dossier for the 18-2673 Upper Unit Seal Kit does not specify included instructions; it is sold as the seal kit itself.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108685531,"sku":"SIE-18-2673","price":56.59,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2673_lg__57195.1558122790.500.750.jpg?v=1785188004"},{"product_id":"sierra-18-2681-lower-unit-seal-kit-for-johnson-evinrude-outboards-replaces-glm-87617","title":"Sierra 18-2681 Lower Unit Seal Kit for Johnson\/Evinrude Outboard Motors, Replaces GLM 87617","description":"\u003cp\u003eThe Sierra 18-2681 Lower Unit Seal Kit is a complete gear housing seal kit built for Johnson and Evinrude outboard motors. It is assembled in Sierra's Illinois factory to OEM-quality standards, so every seal is engineered for the specific application it is designed to fit rather than sold as a generic, one-size-fits-all part. This kit gives outboard owners and marine technicians the seals needed to rebuild or service the lower unit gear housing, restoring the water-tight and oil-tight barriers that keep gear lube in and water out during operation.\u003c\/p\u003e\u003cp\u003eBecause lower unit seals are wear items subject to constant exposure to gear oil, water pressure, and heat, replacing them as a set during a lower unit rebuild or gearcase service helps prevent water intrusion and gear lube contamination, which are common causes of lower unit failure. The kit is packaged as a single unit count, ready to install as part of a routine lower unit service or repair.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2681\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Johnson\/Evinrude Outboard Motor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces:\u003c\/strong\u003e GLM 87617\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.09 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999562807\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 00030999562807\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eThis seal kit is designed for Johnson\/Evinrude outboard motors.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cp\u003eGLM 87617\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2681 Lower Unit Seal Kit include?\u003c\/strong\u003e It includes the seals needed to rebuild the gear housing of a Johnson\/Evinrude outboard lower unit, packaged as a single kit with a unit count of one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboard motors is the 18-2681 seal kit designed for?\u003c\/strong\u003e The 18-2681 kit is designed to fit Johnson\/Evinrude outboard motors.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2681 replace GLM 87617?\u003c\/strong\u003e Yes, the Sierra 18-2681 lower unit seal kit is a direct replacement for GLM 87617.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2681 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2681 Lower Unit Seal Kit weighs 0.09 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this an OEM Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-2681 is a genuine Sierra part, assembled in Sierra's Illinois factory to OEM-quality standards rather than being a generic aftermarket copy.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color are the seals in this kit?\u003c\/strong\u003e The seals in the Sierra 18-2681 kit are white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to install this seal kit?\u003c\/strong\u003e This kit is used when rebuilding or servicing the gear housing of a Johnson\/Evinrude outboard lower unit, typically during a scheduled lower unit rebuild or after a water-intrusion issue.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape are the seals in the 18-2681 kit?\u003c\/strong\u003e The seals included in the Sierra 18-2681 kit are round.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy replace lower unit seals as a full kit instead of individually?\u003c\/strong\u003e Replacing all the seals together, as in the Sierra 18-2681 kit, ensures the entire gear housing is resealed at once, which helps prevent water intrusion and gear lube contamination that can occur if only one worn seal is replaced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2681 seal kit?\u003c\/strong\u003e The UPC for the Sierra 18-2681 Lower Unit Seal Kit is 030999562807.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seal kits come in one package?\u003c\/strong\u003e One Sierra 18-2681 Lower Unit Seal Kit is included per unit, with a unit count of 1.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108718299,"sku":"SIE-18-2681","price":46.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2681_lg__68008.1558123017.500.750.jpg?v=1785189151"},{"product_id":"sierra-18-2672-lower-unit-seal-kit-replaces-omc-984458-985613-439967-fits-v6-v8-omc-cobra-sterndrive-1986-1991","title":"Sierra Lower Unit Seal Kit 18-2672, Replaces OMC 439967\/984458\/985613, for V6\/V8 Cobra Stern Drive (1986-1991)","description":"\u003cp\u003eThe Sierra 18-2672 Lower Unit Seal Kit is a complete set of replacement seals for the lower unit of OMC V6\/V8 Cobra stern drives from the 1986-1991 model years. It is built to restore the watertight, oil-tight seal between the lower unit housing and internal shift components, a common maintenance point when a drive shows signs of gear lube seepage, water intrusion, or shift linkage wear at the lower unit interface. The kit is a direct cross-reference for OMC part numbers 439967, 984458, and 985613, so it fits in place of the original equipment components without modification.\u003c\/p\u003e\u003cp\u003eInside the kit you get a shift cover gasket, two grommets, and a wiper, each matched to its corresponding OMC original equipment number so a technician or DIY boater can complete a full lower unit reseal in one job rather than sourcing individual seals separately. The kit is compatible with OMC Cobra stern drive models SF-20, SF-25, SF-30, SF-35, SF-42, SF-20F, SF-25F, SF-30F, SF-35F, and SF-42F. At 0.19 pounds, it ships as a compact small-parts kit intended for use during routine lower unit service or gear lube changes on applicable Cobra stern drives.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2672\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e All V6\/V8 Cobra (1986-1991)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Models:\u003c\/strong\u003e SF-20, SF-25, SF-30, SF-35, SF-42, SF-20F, SF-25F, SF-30F, SF-35F, SF-42F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Shift Cover Gasket (OEM 911878, Qty 1), Grommet (OEM 911705, Qty 2), Wiper (OEM 912157, Qty 1)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.19 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999312839\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eAll V6\/V8 Cobra (1986-1991)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e439967\u003c\/li\u003e\n\u003cli\u003e984458\u003c\/li\u003e\n\u003cli\u003e985613\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2672 lower unit seal kit fit?\u003c\/strong\u003e The 18-2672 kit is built for all V6\/V8 Cobra stern drives from the 1986-1991 model years, including the SF-20, SF-25, SF-30, SF-35, SF-42, SF-20F, SF-25F, SF-30F, SF-35F, and SF-42F models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM part numbers does 18-2672 replace?\u003c\/strong\u003e Sierra 18-2672 cross-references to OMC part numbers 439967, 984458, and 985613, so it installs in place of any of those original equipment numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2672 seal kit?\u003c\/strong\u003e The kit contains one shift cover gasket (OEM 911878), two grommets (OEM 911705), and one wiper (OEM 912157), covering the seal points typically serviced together on a Cobra lower unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2672 lower unit seal kit weigh?\u003c\/strong\u003e The Sierra 18-2672 kit weighs 0.19 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color are the components in the 18-2672 kit?\u003c\/strong\u003e The seal kit components in Sierra 18-2672 are white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2672 a genuine OMC part or an aftermarket replacement?\u003c\/strong\u003e 18-2672 is a Sierra-manufactured replacement kit, not an original OMC part, but it is a direct equivalent to OMC 439967, 984458, and 985613 and is designed to fit the same applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2672 fit 4-cylinder Cobra drives?\u003c\/strong\u003e No, the 18-2672 kit is designated for V6\/V8 Cobra stern drives (1986-1991); a 4-cylinder Cobra seal kit is a separate part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use 18-2672 to fix gear lube leaks at the lower unit?\u003c\/strong\u003e Yes, the shift cover gasket, grommets, and wiper in the Sierra 18-2672 kit are the seal points commonly responsible for gear lube seepage at the lower unit on applicable V6\/V8 Cobra drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many grommets come in the Sierra 18-2672 kit?\u003c\/strong\u003e Two grommets (OEM 911705) are included in the 18-2672 lower unit seal kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs professional installation required for the 18-2672 seal kit?\u003c\/strong\u003e The kit supplies the gasket, grommets, and wiper for a lower unit reseal on V6\/V8 Cobra stern drives; installation follows standard lower unit disassembly and is commonly performed by a marine technician or an experienced DIY boater.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108751067,"sku":"SIE-18-2672","price":70.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2672_lg__70066.1558122714.500.750.jpg?v=1785188870"},{"product_id":"lower-unit-seal-kit-for-evinrude-johnson-omc-outboards-replaces-omc-330137-303345-327031-sierra-18-2679","title":"Sierra Lower Unit Seal Kit 18-2679, Replaces 303345 and 327031","description":"\u003cp\u003eThe Sierra 18-2679 Lower Unit Seal Kit is a two-piece oil seal set for the lower unit gear housing on Evinrude outboard motors. The kit bundles two oil seals so both sealing points in the gear housing are replaced together during a single service job, helping prevent gear lube leaks and water intrusion that can lead to costly gear housing damage.\u003c\/p\u003e\u003cp\u003eEach seal in this kit corresponds to a specific position in the gear housing: one seal (Sierra 18-2022) replaces the original equipment 303345 seal, and the second seal (Sierra 18-2035) replaces the original equipment 327031 seal. Sourcing both seals as a matched kit under a single Sierra part number simplifies ordering for a complete lower unit reseal rather than tracking down each seal individually.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2679\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e 2 oil seals (Sierra 18-2022 and Sierra 18-2035)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Evinrude Outboard Gear Housing Seal Kits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999562784\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Evinrude outboard gear housings using the 303345 and 327031 original equipment oil seals.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e303345\u003c\/li\u003e\n\u003cli\u003e327031\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2679 Lower Unit Seal Kit include?\u003c\/strong\u003e The kit includes two oil seals: Sierra part 18-2022, which replaces original equipment number 303345, and Sierra part 18-2035, which replaces original equipment number 327031.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-2679 a direct replacement for OEM seals 303345 and 327031?\u003c\/strong\u003e Yes, the Sierra 18-2679 kit is built to replace original equipment oil seals 303345 and 327031 in the gear housing lower unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2679 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2679 Lower Unit Seal Kit weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of outboard does this seal kit belong to?\u003c\/strong\u003e The 18-2679 kit is listed under Evinrude Outboard Gear Housing Seal Kits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in the 18-2679 kit?\u003c\/strong\u003e Two oil seals are included in the 18-2679 kit, one qty each of 18-2022 and 18-2035.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the individual seals in kit 18-2679 be purchased separately?\u003c\/strong\u003e The two seals that make up the 18-2679 kit have their own Sierra part numbers, 18-2022 and 18-2035, though this listing is for the combined two-seal kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra Lower Unit Seal Kit 18-2679?\u003c\/strong\u003e The UPC for the Sierra 18-2679 Lower Unit Seal Kit is 030999562784.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I replace both seals at once with kit 18-2679 instead of one at a time?\u003c\/strong\u003e Replacing both gear housing oil seals together with the 18-2679 kit addresses both sealing points in the same service, reducing the chance of a leak developing at the seal left untouched.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2679 kit include gaskets or just seals?\u003c\/strong\u003e The 18-2679 kit contains oil seals only, specifically the two seals corresponding to OEM numbers 303345 and 327031.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM numbers cross-reference to the Sierra 18-2679 kit?\u003c\/strong\u003e The Sierra 18-2679 Lower Unit Seal Kit cross-references to OEM numbers 303345 and 327031.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108783835,"sku":"SIE-18-2679","price":35.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2679_lg__40455.1558122918.500.750.jpg?v=1785329168"},{"product_id":"sierra-18-2683-lower-unit-seal-kit-for-omc-king-cobra-sterndrive-1990-replaces-omc-313282-309044-303339","title":"Sierra 18-2683 Lower Unit Seal Kit for OMC King Cobra Lower Unit (1990)","description":"\u003cp\u003eThe Sierra 18-2683 Lower Unit Seal Kit is a complete gear housing seal kit for the OMC King Cobra Lower Unit (1990). It bundles the oil seal, bearing housing gasket, and spaghetti seal needed to properly reseal the lower unit gear housing during a rebuild or service, restoring the water-tight and oil-tight barriers that keep gear lube contained and water out of the gearcase. Each component in the kit carries its own Sierra part number and matches the original equipment (O.E.) reference number, so the kit is a direct fit for the components it is designed to service. The oil seal (Sierra 18-2023, O.E. 313282) is supplied in the quantity of two required by the application, and the bearing housing gasket (Sierra 18-2891, O.E. 303339) is supplied as a single gasket. The spaghetti seal (O.E. 309044) rounds out the kit as the third sealing component, supplied in a quantity of one. Sierra manufactures its parts to meet or exceed the original equipment part being replaced, and supplies OEM engine manufacturers and boat builders with parts on a daily basis. This kit is intended for the OMC King Cobra Lower Unit (1990) and is sold as a complete set rather than as individual seals, making it a convenient single purchase for a lower unit reseal job.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2683\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.1 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999562821\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e OMC King Cobra Lower Unit (1990)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes - Oil Seal:\u003c\/strong\u003e Sierra 18-2023, O.E. 313282, Qty 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes - Bearing Housing Gasket:\u003c\/strong\u003e Sierra 18-2891, O.E. 303339, Qty 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes - Spaghetti Seal:\u003c\/strong\u003e O.E. 309044, Qty 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eOMC King Cobra Lower Unit (1990).\u003c\/p\u003e\u003ch3\u003eKit Contents (OEM Cross-Reference)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOil Seal - Sierra 18-2023 - O.E. 313282 - Qty 2\u003c\/li\u003e\n\u003cli\u003eBearing Housing Gasket - Sierra 18-2891 - O.E. 303339 - Qty 1\u003c\/li\u003e\n\u003cli\u003eSpaghetti Seal - O.E. 309044 - Qty 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2683 Lower Unit Seal Kit fit?\u003c\/strong\u003e The Sierra 18-2683 Lower Unit Seal Kit is designed for the OMC King Cobra Lower Unit (1990).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2683 kit?\u003c\/strong\u003e The kit contains an oil seal (Sierra 18-2023, O.E. 313282, quantity 2), a bearing housing gasket (Sierra 18-2891, O.E. 303339, quantity 1), and a spaghetti seal (O.E. 309044, quantity 1).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many oil seals come in the 18-2683 kit?\u003c\/strong\u003e Two oil seals are included, Sierra part number 18-2023 with O.E. Reference 313282.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the bearing housing gasket in this kit the same as O.E. 303339?\u003c\/strong\u003e Yes, the bearing housing gasket in the Sierra 18-2683 kit is Sierra 18-2891, which corresponds to O.E. Number 303339.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2683 seal kit weigh?\u003c\/strong\u003e The Sierra 18-2683 Lower Unit Seal Kit weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-2683 kit packaging or seal material?\u003c\/strong\u003e The listed color for the Sierra 18-2683 Lower Unit Seal Kit is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit include gear lube or other lower unit fluids?\u003c\/strong\u003e No, the 18-2683 kit contains only the sealing components (oil seal, bearing housing gasket, and spaghetti seal) needed to reseal the lower unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre Sierra parts equivalent to OEM in quality?\u003c\/strong\u003e Sierra manufactures the 18-2683 kit and its components to meet or exceed the original equipment part being replaced, and Sierra supplies parts to OEM engine manufacturers and boat builders.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the spaghetti seal used for in this kit?\u003c\/strong\u003e The spaghetti seal (O.E. 309044) included in the Sierra 18-2683 kit is one of the three sealing components used during a lower unit reseal, supplied in a quantity of one.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2683 sold as individual seals or a complete kit?\u003c\/strong\u003e The Sierra 18-2683 is sold as a complete lower unit seal kit containing the oil seal, bearing housing gasket, and spaghetti seal together rather than as separate parts.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108849371,"sku":"SIE-18-2683","price":35.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2683_lg__87270.1686315374.500.750.jpg?v=1785188390"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/collections\/EMP_61-08399_MerCruiser_Transom_Service_Kit__56903.1729003502.500.750.jpg?v=1785357539","url":"https:\/\/www.goodvibesmarina.com\/collections\/gvcat-propellers-drive-lower-unit-lower-unit-gearcase.oembed?page=2","provider":"Good Vibes Marina","version":"1.0","type":"link"}