{"title":"Cooling System","description":null,"products":[{"product_id":"sierra-18-3017-marine-water-pump-impeller-replaces-mercury-force-47-89984t4-85-90-hp-outboard","title":"Sierra 18-3017 Impeller - Replaces Mercury Marine 47-89984, 47-30221 - MerCruiser MR\/Alpha One Stern Drives","description":"\u003cp\u003eThe Sierra 18-3017 is a replacement water pump impeller engineered for MerCruiser MR and Alpha One stern drives. As the wear component inside the drive's water pump, the impeller circulates raw water through the cooling system, and its flexible vanes are the first part to degrade from age, dry-running, or debris intake, which makes periodic replacement essential to prevent overheating. This impeller cross-references directly to Mercury Marine, MerCruiser stern drive, and Chrysler\/Force OEM part numbers, giving boat owners and marine technicians a straightforward way to source a correct replacement without going through the original engine manufacturer. It is built with a machined exterior for a consistent fit inside the pump housing and is sized for the pump body used on MR and Alpha One drives within specific serial number ranges. The 18-3017 is also the impeller specified for use inside a number of Sierra water pump kits and a complete lower gearcase rebuild kit, so it can be purchased on its own for a straight impeller swap or as part of a broader water pump service. At 0.2 pounds and approximately 1.5 x 6 x 6 inches as packaged, it is a compact, low-cost part that keeps a stern drive's raw water cooling system running as designed. Because fitment is tied to drive serial number, confirming the correct range before ordering helps ensure the right impeller is installed the first time.\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 18-3017\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Impeller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 1.5 x 6 x 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExterior:\u003c\/strong\u003e Machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999315045\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Sierra Kits:\u003c\/strong\u003e 18-3217, 18-3217D, 18-3251, 18-3251D, 18-3314, 18-3316, 18-3317, 18-3319, 18-3320, 18-3321, 18-3517, 18-8370\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference Numbers:\u003c\/strong\u003e 47-65960, 47-803631T, 47-89984, 47-89984T4, 694065, 47-F694065, 47-30221, 89840, 9-45306, 47-899844, 47-899842, 47-85460, 47-89984T3\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser MR and Alpha One stern drives, serial numbers 2495186 to 2763441\u003c\/li\u003e\n\u003cli\u003eMerCruiser MR and Alpha One stern drives without a flush screw in the gear housing, serial numbers 2763442 to 6854392\u003c\/li\u003e\n\u003cli\u003eMerCruiser MR\/Alpha One stern drives, serial numbers 6854393 to 0D594568\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eUnits in the 2763442 to 6854392 serial range that have been retro-fitted with an Alpha-style lower unit (no pre-load pin in the top of the driveshaft) require Alpha-style parts instead, and should use part numbers 18-3320 and 18-3420 rather than the standard parts listed for that range.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e47-65960\u003c\/li\u003e\n\u003cli\u003e47-803631T\u003c\/li\u003e\n\u003cli\u003e47-89984\u003c\/li\u003e\n\u003cli\u003e47-89984T4\u003c\/li\u003e\n\u003cli\u003e694065\u003c\/li\u003e\n\u003cli\u003e47-F694065\u003c\/li\u003e\n\u003cli\u003e47-30221\u003c\/li\u003e\n\u003cli\u003e89840\u003c\/li\u003e\n\u003cli\u003e9-45306\u003c\/li\u003e\n\u003cli\u003e47-899844\u003c\/li\u003e\n\u003cli\u003e47-899842\u003c\/li\u003e\n\u003cli\u003e47-85460\u003c\/li\u003e\n\u003cli\u003e47-89984T3\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3017 impeller fit?\u003c\/strong\u003e The Sierra 18-3017 fits MerCruiser MR and Alpha One stern drives, and the correct application depends on the drive's serial number: 2495186 to 2763441, 2763442 to 6854392 (units without a flush screw in the gear housing), or 6854393 to 0D594568.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3017 a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e Part number 18-3017 is a Sierra-brand impeller sold under that number, made to cross-reference directly with the original Mercury Marine and MerCruiser impellers it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM part numbers does 18-3017 replace?\u003c\/strong\u003e The 18-3017 cross-references to Mercury Marine and MerCruiser numbers 47-65960, 47-89984, 47-89984T4, 47-89984T3, 47-899842, 47-899844, 47-85460, 47-30221, and 694065, as well as Chrysler\/Force numbers 47-803631T and 47-F694065.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this impeller weigh?\u003c\/strong\u003e The Sierra 18-3017 impeller weighs 0.2 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-3017?\u003c\/strong\u003e As packaged, the Sierra 18-3017 measures approximately 1.5 x 6 x 6 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use 18-3017 if my drive has been retrofitted with an Alpha-style lower unit?\u003c\/strong\u003e No, not for units in the 2763442 to 6854392 serial range: if that drive has been retro-fitted with an Alpha-style lower unit (no pre-load pin in the top of the driveshaft), it needs Alpha-style parts 18-3320 and 18-3420 instead of the standard impeller listed for that range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat finish does the 18-3017 impeller have?\u003c\/strong\u003e The Sierra 18-3017 has a machined exterior finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-3017 used in any complete water pump kits?\u003c\/strong\u003e Yes, the 18-3017 impeller is specified for use inside several Sierra water pump kits, including 18-3217, 18-3251, 18-3314, 18-3316, 18-3317, 18-3319, 18-3320, 18-3321, 18-3517, and the 18-8370 complete lower gearcase rebuild kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if 18-3017 is the right impeller for my MerCruiser instead of a different Sierra number?\u003c\/strong\u003e Fitment for 18-3017 is tied to your MerCruiser MR or Alpha One drive's serial number falling within 2495186 to 6854392 (or up to 0D594568 for MR\/Alpha One units); drives outside these ranges, such as Alpha One Generation II, Vazer, or Bravo units, use a different impeller part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3017 include the water pump housing or gasket?\u003c\/strong\u003e The 18-3017 is the impeller itself; it is designed to install into the existing MerCruiser MR\/Alpha One water pump housing rather than including a housing or full gasket set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-3017 fit a Chrysler or Force outboard?\u003c\/strong\u003e The 18-3017 cross-references to Chrysler\/Force part numbers 47-803631T and 47-F694065, indicating compatibility with certain Chrysler\/Force applications that use those OEM impellers.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48987964276955,"sku":"SIE-18-3017","price":19.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__02071.1753840677.500.750.jpg?v=1785189005"},{"product_id":"sierra-18-0164-9-thermostat-housing-gasket-replaces-omc-311069-gm-3789161-4-6-cyl-marine-engines-pack-of-2","title":"Sierra Thermostat Housing Gasket 18-0164-9, Replaces Yamaha YSC-13080-00-0C, Pack of 2","description":"\u003cp\u003eThe Sierra 18-0164-9 Thermostat Housing Gasket seals the thermostat housing on Yamaha sterndrive engines, preventing coolant leaks and maintaining proper cooling system pressure. This gasket is manufactured to meet or exceed original equipment quality, giving it a reliable, leak-free seal at the thermostat housing mating surface. It is round in shape and sold in a package of 2, so you have a spare on hand or enough to service two units in one order.\u003c\/p\u003e\u003cp\u003eInstalling a fresh thermostat housing gasket during any thermostat service, cooling system inspection, or overheating diagnosis helps ensure the housing seats correctly and holds pressure. Because it is a direct cross-reference for the Yamaha YSC-13080-00-0C and GM 3789161 gaskets, it drops into place wherever those original parts are called for, without modification.\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 18-0164-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 2\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 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282161453\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e YSC-13080-00-0C, GM 3789161\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha sterndrive engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYSC-13080-00-0C\u003c\/li\u003e\n\u003cli\u003eGM 3789161\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0164-9 gasket fit?\u003c\/strong\u003e The Sierra 18-0164-9 is a thermostat housing gasket designed for Yamaha sterndrive engines, directly replacing the Yamaha YSC-13080-00-0C thermostat gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0164-9 the same as the Yamaha YSC-13080-00-0C gasket?\u003c\/strong\u003e Yes, part 18-0164-9 is a direct cross-reference for the Yamaha YSC-13080-00-0C thermostat housing gasket, so it installs in the same location without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket also cross-reference to a GM part number?\u003c\/strong\u003e Yes, the 18-0164-9 thermostat housing gasket also replaces GM 3789161.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of 18-0164-9?\u003c\/strong\u003e Each package of the 18-0164-9 thermostat housing gasket contains 2 gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the 18-0164-9 thermostat housing gasket?\u003c\/strong\u003e The 18-0164-9 is a round gasket, matching the round mating surface of the thermostat housing it seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0164-9 gasket weigh?\u003c\/strong\u003e The Sierra 18-0164-9 thermostat housing gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0164-9 gasket genuine OEM or aftermarket?\u003c\/strong\u003e The 18-0164-9 is a Sierra-manufactured aftermarket gasket built to meet or exceed the quality of the original Yamaha YSC-13080-00-0C and GM 3789161 gaskets it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the thermostat housing gasket?\u003c\/strong\u003e Replace the 18-0164-9 thermostat housing gasket any time the thermostat housing is removed for service, or if coolant leaks are found at the housing seam.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0164-9 gasket?\u003c\/strong\u003e The UPC for the Sierra 18-0164-9 thermostat housing gasket is 808282161453.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I reuse the old gasket instead of buying the 18-0164-9?\u003c\/strong\u003e A new 18-0164-9 gasket is recommended rather than reusing the old one, since gaskets compress and can leak once removed from the thermostat housing.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988027093211,"sku":"SIE-18-0164-9","price":3.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0164_lg__15556.1558117879.500.750.jpg?v=1785188014"},{"product_id":"sierra-18-0182-9-thermostat-gasket-replaces-evinrude-johnson-337068-pack-of-2-for-evinrude-johnson-outboards","title":"Sierra 18-0182-9 Thermostat Gasket, Pack of 2 - Fits Johnson\/Evinrude 200-235 HP Outboards","description":"\u003cp\u003eThe Sierra 18-0182-9 Thermostat Gasket is a replacement gasket for the thermostat housing on select Johnson\/Evinrude outboard motors, sold as a pack of 2 so you have a spare on hand or can service both cylinder banks in one job. The gasket seals the thermostat housing to the cylinder head, maintaining proper cooling system pressure and preventing water leakage around the thermostat during operation. It is round in shape with a multi-colored appearance and is built to meet or exceed the quality of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003eThis gasket is designed for Johnson\/Evinrude outboards rated at 200 HP (1977-83) and 235 HP (1978-85). It is also cross-referenced to several other aftermarket and OEM part numbers, making it a straightforward swap for boat owners and marine technicians sourcing a replacement gasket by an equivalent part number. Each pack ships as a lightweight, low-cost maintenance item intended to be replaced any time the thermostat housing is removed or serviced, ensuring a proper seal and preventing coolant leaks after reassembly.\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 18-0182-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 2\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 Multi-colored\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282161484\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e GLM 30610, Evinrude\/Johnson 310058, Mallory 9-60002, Mercury 27-62386, 27-62386001\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 200 HP outboards, 1977-83\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 235 HP outboards, 1978-85\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 30610\u003c\/li\u003e\n\u003cli\u003eEvinrude\/Johnson 310058\u003c\/li\u003e\n\u003cli\u003eMallory 9-60002\u003c\/li\u003e\n\u003cli\u003eMercury 27-62386\u003c\/li\u003e\n\u003cli\u003eMercury 27-62386001\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0182-9 thermostat gasket fit?\u003c\/strong\u003e It fits Johnson\/Evinrude outboards rated at 200 HP built from 1977-83 and 235 HP built from 1978-85.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets are in one package?\u003c\/strong\u003e The Sierra 18-0182-9 comes as a pack of 2 thermostat gaskets, giving you a spare or enough for a two-bank service job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0182-9 interchangeable with other brands?\u003c\/strong\u003e Yes, it cross-references to GLM 30610, Evinrude\/Johnson 310058, Mallory 9-60002, and Mercury 27-62386 \/ 27-62386001, so it can be ordered under any of those numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape and color is this gasket?\u003c\/strong\u003e The 18-0182-9 gasket is round in shape with a multi-colored appearance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0182-9 pack weigh?\u003c\/strong\u003e The pack weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The Sierra 18-0182-9 is an aftermarket thermostat gasket built to meet or exceed the quality of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0182-9 thermostat gasket?\u003c\/strong\u003e The UPC is 808282161484.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-0182-9 work on a 225 HP Johnson\/Evinrude outboard?\u003c\/strong\u003e No, the fitment for the 18-0182-9 covers 200 HP (1977-83) and 235 HP (1978-85) models; other horsepower and year ranges use a different Sierra thermostat gasket part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes in the box with this purchase?\u003c\/strong\u003e Each order includes 2 Sierra 18-0182-9 thermostat gaskets and nothing else.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the Mercury 27-62386 gasket be used in place of the Sierra 18-0182-9?\u003c\/strong\u003e Yes, Mercury 27-62386 (and 27-62386001) is one of the cross-reference numbers for the Sierra 18-0182-9, so either number will get you the same gasket.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988029649115,"sku":"SIE-18-0182-9","price":3.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-0182-9__25311.1722487561.500.750.jpg?v=1785188852"},{"product_id":"thermostat-gasket-for-mercury-outboards-replaces-oem-27-14318-2-27-14318-3-mpn-118-0323","title":"Sierra Thermostat Gasket 18-0323 for Mercury Outboard Engines","description":"\u003cp\u003eThe Sierra 18-0323 is a thermostat gasket engineered for Mercury outboard engines. It seats between the thermostat housing and the engine block or cylinder head, creating the seal that keeps the cooling system's water flow contained and prevents leaks at the thermostat housing joint. Over time, factory gaskets can compress, harden, or tear, which allows water to seep past the housing and can lead to overheating or coolant loss; replacing the gasket with the Sierra 18-0323 restores a tight seal at this connection point.\u003c\/p\u003e\u003cp\u003eThis is a small, single-use component intended to be installed whenever the thermostat housing is opened, whether for a thermostat replacement, inspection, or general cooling system maintenance on a Mercury outboard. Keeping a spare on hand is useful for any outboard owner who services their own cooling system, since the gasket should be replaced rather than reused each time the housing is removed.\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 18-0323\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury Outboard Engines\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 030999873125\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-0323 used for?\u003c\/strong\u003e It is a thermostat gasket that seals the thermostat housing on Mercury outboard engines, preventing water from leaking past the housing joint.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines does the Sierra 18-0323 fit?\u003c\/strong\u003e The Sierra 18-0323 thermostat gasket is designed for use on Mercury outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0323 a genuine Sierra part?\u003c\/strong\u003e Yes, part number 18-0323 is manufactured and sold under the Sierra brand.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0323 gasket weigh?\u003c\/strong\u003e The Sierra 18-0323 thermostat gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes in the package for the 18-0323?\u003c\/strong\u003e The Sierra 18-0323 is sold as a single thermostat gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the thermostat gasket on my Mercury outboard?\u003c\/strong\u003e Any time the thermostat housing on a Mercury outboard is removed, such as for a thermostat replacement or cooling system inspection, the gasket underneath it, like the Sierra 18-0323, should be replaced rather than reused since it will not reseal reliably once disturbed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan a worn thermostat gasket cause overheating?\u003c\/strong\u003e A compressed or torn thermostat housing gasket can allow water to leak past the seal, which can reduce cooling efficiency; the Sierra 18-0323 replaces that gasket to restore a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0323 gasket?\u003c\/strong\u003e The UPC for the Sierra 18-0323 thermostat gasket is 030999873125.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988062941403,"sku":"SIE-18-0323","price":2.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0323_lg__19292.1558120597.500.750.jpg?v=1785329185"},{"product_id":"sierra-18-0327-water-pump-gasket-replaces-omc-volvo-penta-3853342-mallory-27-33956-mercruiser-volvo-penta-omc","title":"Sierra 18-0327 Water Pump Gasket, Interchanges with OMC\/Volvo Penta 3853342, GLM 31350, Mallory 27-33956","description":"\u003cp\u003eThe Sierra 18-0327 is a round water pump gasket used to create a leak-free seal between a marine engine's water pump and its mounting surface. It is manufactured to meet or exceeds the quality of the original equipment part it replaces, making it a reliable choice whenever a water pump is serviced, rebuilt, or replaced and a fresh gasket is needed to restore a proper seal. Each unit ships as a single gasket (1 count) and is backed by a 90-day warranty.\u003c\/p\u003e\u003cp\u003eThe 18-0327 is a direct interchange for several OEM and aftermarket gasket numbers, so it can be ordered using any of the equivalent part numbers a technician or parts counter may reference: GLM 31350, Mallory 27-33956, FI5000200, FI5000219, OMC 3853342, and Volvo Penta 3853342. Confirm the gasket number required by your specific water pump 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 18-0327\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 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999873163\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 00030999873163\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 90 days\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e GLM 31350, Mallory 27-33956, FI5000200, FI5000219, OMC 3853342, Volvo Penta 3853342\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 31350\u003c\/li\u003e\n\u003cli\u003eMallory 27-33956\u003c\/li\u003e\n\u003cli\u003eFI5000200\u003c\/li\u003e\n\u003cli\u003eFI5000219\u003c\/li\u003e\n\u003cli\u003eOMC 3853342\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 3853342\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-0327 gasket used for?\u003c\/strong\u003e It seals the mating surface between a marine engine's water pump and its housing, and is used whenever the water pump is replaced or serviced to restore a leak-free seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0327 the same as OMC or Volvo Penta 3853342?\u003c\/strong\u003e Yes, the 18-0327 is a direct interchange for OMC 3853342 and Volvo Penta 3853342, along with GLM 31350, Mallory 27-33956, FI5000200, and FI5000219.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill 18-0327 work in place of a Mallory 27-33956 gasket?\u003c\/strong\u003e Yes, Mallory 27-33956 is one of the listed cross-reference numbers for the Sierra 18-0327 gasket, so it is a suitable direct replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the 18-0327 water pump gasket?\u003c\/strong\u003e The Sierra 18-0327 is a round gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0327 gasket weigh?\u003c\/strong\u003e It weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part number 18-0327?\u003c\/strong\u003e You receive one Sierra 18-0327 water pump gasket (unit count of 1).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0327 gasket genuine OEM or aftermarket?\u003c\/strong\u003e The 18-0327 is a Sierra aftermarket gasket manufactured to meet or exceed the quality of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat warranty comes with the Sierra 18-0327 gasket?\u003c\/strong\u003e The Sierra 18-0327 water pump gasket carries a 90-day warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-0327 gasket made from?\u003c\/strong\u003e The specific gasket material is not published for the 18-0327, but it is built to meet or exceed original equipment quality standards for its application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I find the correct gasket if I only have my old water pump's part number?\u003c\/strong\u003e Check your old gasket or pump documentation against the 18-0327's cross-reference numbers, GLM 31350, Mallory 27-33956, FI5000200, FI5000219, OMC 3853342, and Volvo Penta 3853342, to confirm it is the correct match before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the UPC 030999873163 belong to the Sierra 18-0327?\u003c\/strong\u003e Yes, UPC 030999873163 (GTIN 00030999873163) identifies the Sierra 18-0327 water pump gasket.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988064579803,"sku":"SIE-18-0327","price":2.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0327_lg__86974.1558120737.500.750.jpg?v=1785188282"},{"product_id":"sierra-18-0345-water-pump-gasket-replaces-chrysler-12-866451-chrysler-inboard-engines","title":"Sierra Water Pump Gasket 18-0345, GLM 37490 Cross Reference, Chrysler Inboard","description":"\u003cp\u003eThe Sierra Water Pump Gasket, part number 18-0345, is a round gasket designed for Chrysler inboard water pump applications. It seals the water pump housing to prevent coolant or raw water leakage at the mating surface, protecting the pump and surrounding engine components from moisture intrusion and pressure loss during operation.\u003c\/p\u003e\u003cp\u003eThis gasket is sold as a single unit and is intended to be replaced any time the water pump housing is removed or serviced, since reusing an old gasket can allow leaks to develop even if it looks intact. It carries the Sierra brand name and part number 18-0345, and cross-references to GLM number 37490, so buyers who know either numbering system can confirm they are ordering the correct gasket for their Chrysler inboard water pump.\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 18-0345\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Chrysler Inboard Water Pumps and Impellers\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\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 808282145798\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGLM Cross Reference Number:\u003c\/strong\u003e 37490\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eChrysler inboard water pumps\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGLM 37490\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is Sierra part number 18-0345?\u003c\/strong\u003e It is a round water pump gasket made by Sierra for Chrysler inboard water pump applications, sold as a single gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes GLM number 37490 match this gasket?\u003c\/strong\u003e Yes, GLM number 37490 cross-references directly to Sierra 18-0345, so either number identifies the same water pump gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0345 gasket weigh?\u003c\/strong\u003e The Sierra 18-0345 water pump gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the Sierra 18-0345 gasket?\u003c\/strong\u003e It is round in shape, matching the mating surface of the Chrysler inboard water pump housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of 18-0345?\u003c\/strong\u003e Each package of Sierra 18-0345 contains a single water pump gasket, listed as a unit count of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould I replace the gasket every time I remove the water pump?\u003c\/strong\u003e Yes, the Sierra 18-0345 gasket should be replaced whenever the Chrysler inboard water pump housing is removed, since a reused gasket can leak even if it appears undamaged.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engine application is the 18-0345 gasket used for?\u003c\/strong\u003e Sierra 18-0345 is used on Chrysler inboard water pump and impeller assemblies.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0345 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-0345 is the Sierra manufacturer part number for this water pump gasket, not a generic aftermarket substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0345 gasket?\u003c\/strong\u003e The UPC for the Sierra 18-0345 water pump gasket is 808282145798.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the GLM 37490 number to order this part?\u003c\/strong\u003e Yes, GLM 37490 is the cross-reference number for Sierra 18-0345, so referencing either number will get you the correct gasket.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988065530075,"sku":"SIE-18-0345","price":5.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0345_lg__76482.1558118436.500.750.jpg?v=1785188083"},{"product_id":"sierra-18-0386-water-pump-body-gasket-for-mercruiser-replaces-oem-27-94914","title":"Sierra 18-0386 Water Pump Body Gasket - Replaces 27-94914, 27-72780","description":"\u003cp\u003eThe Sierra 18-0386 Water Pump Body Gasket seals the mating surface between the water pump body and the housing on applicable Mercruiser sterndrive engines, preventing raw water leakage at this joint during operation. It is manufactured to meet or exceed the quality of the original equipment part it replaces, making it a reliable choice when servicing or rebuilding a water pump assembly. This is a single gasket, sold individually, designed for a precise fit against the original mounting pattern so it seats correctly without additional trimming or modification.\u003c\/p\u003e\u003cp\u003eThis gasket is commonly replaced any time the water pump body is removed for service, such as during an impeller replacement, water pump rebuild, or when addressing a coolant or raw water leak at the pump housing. Installing a new gasket rather than reusing the old one helps ensure a proper seal and reduces the risk of leaks after reassembly. The part is identified by Sierra part number 18-0386 and directly corresponds to the OEM Mercruiser numbers listed below, so it can be cross-referenced against those part numbers when 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 18-0386\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Water Pump Body Gasket\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 gasket per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999873675\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Water Pumps and Impellers\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Mercruiser sterndrive water pump assemblies that use OEM gasket 27-94914 or 27-72780.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-94914\u003c\/li\u003e\n\u003cli\u003e27-72780\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0386 Water Pump Body Gasket fit?\u003c\/strong\u003e The Sierra 18-0386 is designed for Mercruiser sterndrive water pump assemblies that use OEM gasket numbers 27-94914 or 27-72780, sealing the water pump body to its housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0386 gasket the same as Mercruiser 27-94914?\u003c\/strong\u003e Yes, Sierra part 18-0386 directly replaces Mercruiser OEM gasket 27-94914, along with 27-72780, and is built to meet or exceed the original equipment specification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of the 18-0386?\u003c\/strong\u003e The Sierra 18-0386 Water Pump Body Gasket is sold as a single gasket per package, intended for one water pump body installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0386 gasket weigh?\u003c\/strong\u003e This gasket weighs 0.01 pounds, consistent with its use as a thin sealing component rather than a structural part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the water pump body gasket?\u003c\/strong\u003e Replace the 18-0386 gasket any time the water pump body is removed, such as during impeller service or a water pump rebuild, to ensure a proper seal against leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0386 an OEM part or aftermarket?\u003c\/strong\u003e The 18-0386 is a Sierra-manufactured aftermarket gasket engineered to meet or exceed the quality of the original Mercruiser equipment it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I reuse the old water pump gasket instead of installing a new one?\u003c\/strong\u003e Reusing an old gasket is not recommended; installing a new Sierra 18-0386 gasket during water pump service helps ensure a reliable seal and reduces the chance of leaks after reassembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0386 gasket require any trimming to fit?\u003c\/strong\u003e No, the Sierra 18-0386 Water Pump Body Gasket is manufactured to match the original mounting pattern, so it seats correctly without trimming or modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers cross-reference to the Sierra 18-0386?\u003c\/strong\u003e The Sierra 18-0386 gasket cross-references to Mercruiser OEM numbers 27-94914 and 27-72780.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-0386?\u003c\/strong\u003e Ordering the Sierra 18-0386 includes one water pump body gasket, sold individually rather than as part of a kit.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988072804571,"sku":"SIE-18-0386","price":2.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0386_lg__66528.1558120113.500.750.jpg?v=1785188700"},{"product_id":"sierra-18-0389-heat-exchanger-end-gasket-replaces-mercruiser-27-99960-3-15-16-in-mercruiser-cooling-system","title":"Sierra 18-0389 Heat Exchanger End Gasket, Replaces 27-75450, 224 CID, 2-3\/4 Inch Diameter","description":"\u003cp\u003eThe Sierra 18-0389 Heat Exchanger End Gasket seals the end cover of the heat exchanger on 224 CID marine engines, forming the barrier between the raw water and coolant sides of the cooling system. It is built as a direct cross-reference replacement for OEM number 27-75450, giving boat owners and marine technicians a reliable option for cooling system service and rebuilds without waiting on OEM parts. The gasket measures 2-3\/4 inches in diameter, sized to match the heat exchanger end cover it is designed for.\u003c\/p\u003e\u003cp\u003eThis gasket is a wear item that should be replaced any time the heat exchanger end cap is removed for inspection, descaling, or cleaning, since a used gasket will not reliably reseal and can allow coolant or raw water leakage. Installing a fresh gasket at each service interval helps maintain proper sealing pressure across the heat exchanger end cover and supports consistent engine cooling performance. As part of the Mercruiser cooling system parts group, it is intended for use during routine heat exchanger maintenance and cooling system rebuilds.\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 18-0389\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Heat Exchanger End Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 2-3\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 224 CID\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-75450\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 Multicoloured\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999873705\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 0.08 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for 224 CID marine engines using a heat exchanger cooling system.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e27-75450\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0389 Heat Exchanger End Gasket fit?\u003c\/strong\u003e The Sierra 18-0389 is designed for 224 CID marine engines that use a heat exchanger cooling system, sealing the heat exchanger end cover.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-0389 gasket replace?\u003c\/strong\u003e It replaces OEM number 27-75450, making it a direct cross-reference for that original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the diameter of this gasket?\u003c\/strong\u003e The Sierra 18-0389 Heat Exchanger End Gasket measures 2-3\/4 inches in diameter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one package?\u003c\/strong\u003e Each package of the 18-0389 contains a package quantity of 1 gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0389 gasket weigh?\u003c\/strong\u003e It weighs 0.08 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should this heat exchanger end gasket be replaced?\u003c\/strong\u003e Replace the 18-0389 gasket any time the heat exchanger end cover is removed for cleaning, descaling, or inspection, since a reused gasket will not reseal reliably.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0389 an OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-0389 is a Sierra aftermarket gasket manufactured as a cross-reference replacement for OEM part 27-75450, not an OEM-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if this gasket is not replaced during heat exchanger service?\u003c\/strong\u003e Reinstalling an old, compressed gasket on the heat exchanger end cover of a 224 CID engine can lead to coolant or raw water leaks at the end cover seam.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape and color is the 18-0389 gasket?\u003c\/strong\u003e The Sierra 18-0389 is a round gasket with a multicoloured appearance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0389 gasket suitable for a cooling system rebuild?\u003c\/strong\u003e Yes, it is intended for use in heat exchanger maintenance and cooling system rebuilds on 224 CID marine engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988073099483,"sku":"SIE-18-0389","price":8.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0389_lg__31448.1558120273.500.750.jpg?v=1785188573"},{"product_id":"sierra-18-0398-9-thermostat-gasket-replaces-mercruiser-27-33918-27-8m2021920-for-mercruiser-volvo-penta-pack-of-2","title":"Sierra 18-0398-9 Thermostat Gasket, Pack of 2, Replaces Mercruiser 27-33918 and OMC 385211","description":"\u003cp\u003eThe Sierra 18-0398-9 thermostat gasket seals the thermostat housing on compatible marine engines, providing a leak-free seal between the housing and the engine block or manifold. Sold in a pack of two, it gives boat owners and technicians enough material on hand to complete a full thermostat service or to keep a spare for the next maintenance interval. The gasket is manufactured by Sierra to meet or exceed the quality of the original equipment part it replaces, making it a straightforward drop-in during a thermostat replacement, cooling system inspection, or general engine maintenance.\u003c\/p\u003e\u003cp\u003eBecause thermostat housings and gaskets are shared across several engine brands, the 18-0398-9 cross-references to a range of OEM part numbers from Mercruiser, OMC, Volvo Penta, GLM, and Mallory, so it can be ordered using whichever number appears on the old gasket or in the engine's parts manual. Its light weight and simple flat-gasket design make it easy to install with basic hand tools once the old thermostat and gasket are removed and the mating surfaces are cleaned.\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 18-0398-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat 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 808282161569\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits engines that use a thermostat housing gasket cross-referenced to the Mercruiser, OMC, Volvo Penta, GLM, and Mallory part numbers listed below.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 35060\u003c\/li\u003e\n\u003cli\u003eMallory 9-60009\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-33918\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-8M2021920\u003c\/li\u003e\n\u003cli\u003eOMC 385211\u003c\/li\u003e\n\u003cli\u003eOMC 312797\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 835417\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0398-9 thermostat gasket cross-reference to?\u003c\/strong\u003e The Sierra 18-0398-9 thermostat gasket is interchangeable with GLM 35060, Mallory 9-60009, Mercruiser 27-33918, Mercruiser 27-8M2021920, OMC 385211, OMC 312797, and Volvo Penta 835417.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come with an order of 18-0398-9?\u003c\/strong\u003e This listing for the Sierra 18-0398-9 thermostat gasket is priced and sold as a pack of two gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0398-9 gasket meet original equipment quality?\u003c\/strong\u003e Yes, the Sierra 18-0398-9 thermostat gasket is manufactured to meet or exceed the quality of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this gasket fit a Mercruiser engine thermostat housing?\u003c\/strong\u003e Yes, the Sierra 18-0398-9 gasket cross-references to Mercruiser part numbers 27-33918 and 27-8M2021920.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0398-9 gasket compatible with OMC engines?\u003c\/strong\u003e Yes, it cross-references to OMC part numbers 385211 and 312797.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-0398-9 gasket work on Volvo Penta engines?\u003c\/strong\u003e Yes, the Sierra 18-0398-9 thermostat gasket cross-references to Volvo Penta part number 835417.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0398-9 thermostat gasket weigh?\u003c\/strong\u003e The Sierra 18-0398-9 thermostat gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is used for the Sierra 18-0398-9 gasket?\u003c\/strong\u003e The Sierra 18-0398-9 thermostat gasket is identified by UPC 808282161569.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm 18-0398-9 is the correct gasket for my engine?\u003c\/strong\u003e Match the part number stamped on your old thermostat gasket, or your engine's parts manual, against the cross-reference numbers for the Sierra 18-0398-9: GLM 35060, Mallory 9-60009, Mercruiser 27-33918, Mercruiser 27-8M2021920, OMC 385211, OMC 312797, or Volvo Penta 835417.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or a generic aftermarket copy?\u003c\/strong\u003e The 18-0398-9 is manufactured and sold under the Sierra brand, part number 18-0398-9, rather than an unbranded generic part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I purchase the 18-0398-9 gasket?\u003c\/strong\u003e An order of Sierra 18-0398-9 includes two thermostat gaskets, sold as a pack.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-0398-9 gasket be used with a Mallory or GLM thermostat housing?\u003c\/strong\u003e Yes, the Sierra 18-0398-9 thermostat gasket cross-references to GLM 35060 and Mallory 9-60009.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988073132251,"sku":"SIE-18-0398-9","price":5.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0398-9__19628.1737854133.500.750.jpg?v=1785188003"},{"product_id":"sierra-18-0415-9-water-pump-gasket-pkg-of-2-replaces-chrysler-27-19701-fits-chrysler-inboard-water-pumps","title":"Sierra Water Pump Gasket 18-0415-9, Pkg of 2, Replaces OEM 27-F523031, Chrysler Inboard","description":"\u003cp\u003eThe Sierra 18-0415-9 is a water pump gasket sold in a package of 2, made for Chrysler inboard marine engine water pumps. This gasket creates the seal between the water pump housing and its mating surfaces, preventing raw water or coolant leaks at the pump. Because a worn or torn gasket is one of the most common causes of water pump leaks and reduced cooling performance, replacing it whenever the pump is serviced or rebuilt helps keep the cooling circuit sealed and functioning correctly.\u003c\/p\u003e\u003cp\u003eEach package contains 2 gaskets, so a single purchase covers a complete pump reseal or gives you a spare for a future service. The part is lightweight, with each package weighing 0.02 pounds, consistent with a thin, precision-cut gasket profile. It is cross-referenced to OEM part number 27-F523031, letting owners confirm fit against the original equipment number before ordering. The gasket is identified by UPC 808282161583 and is intended as a direct fit for the Chrysler inboard water pump application it is cataloged under, so no cutting or trimming should be needed during installation.\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 18-0415-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e Pkg of 2\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 808282161583\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Chrysler Inboard Water Pump\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 27-F523031\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eChrysler inboard marine engine water pumps.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e27-F523031\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0415-9 water pump gasket fit?\u003c\/strong\u003e The 18-0415-9 is cataloged for Chrysler inboard marine engine water pumps, sealing the pump housing to its mating surface.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of 18-0415-9?\u003c\/strong\u003e Each package of the Sierra 18-0415-9 contains 2 water pump gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-0415-9 the same as OEM part 27-F523031?\u003c\/strong\u003e Yes, the Sierra 18-0415-9 water pump gasket is cross-referenced to replace OEM part number 27-F523031.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0415-9 gasket package weigh?\u003c\/strong\u003e The package weighs 0.02 pounds, reflecting the thin, precision-cut profile typical of a water pump gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part?\u003c\/strong\u003e Yes, 18-0415-9 is a genuine Sierra water pump gasket, identified by UPC 808282161583.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to replace the gasket every time I service the water pump?\u003c\/strong\u003e A fresh gasket like the 18-0415-9 should be installed any time the water pump housing is removed, since reusing a compressed gasket can allow leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order 18-0415-9?\u003c\/strong\u003e The package includes 2 water pump gaskets for the Chrysler inboard water pump application; no other hardware is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-0415-9 sold individually or only as a pair?\u003c\/strong\u003e Sierra sells this gasket as a package of 2 under part number 18-0415-9, not as a single individual gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM number should I check against before ordering 18-0415-9?\u003c\/strong\u003e Check your water pump housing against OEM number 27-F523031, which the 18-0415-9 gasket is designed to replace.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0415-9 gasket?\u003c\/strong\u003e The UPC for the Sierra 18-0415-9 water pump gasket package is 808282161583.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988073656539,"sku":"SIE-18-0415-9","price":6.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0415-9__43552.1722369702.500.750.jpg?v=1785187981"},{"product_id":"sierra-18-0563-water-tube-rubber-seal-for-mercury-mariner-outboards-replaces-oem-26-36556","title":"Sierra 18-0563 Water Tube Rubber Seal - OEM 26-36556 for Mercury\/Mariner Outboard Motors","description":"\u003cp\u003eThe Sierra 18-0563 is a rubber water tube seal engineered for Mercury and Mariner outboard motor cooling systems. This small but essential seal fits over the water tube where it passes between the powerhead and the lower unit, maintaining a watertight connection so raw water can travel through the cooling passages without leaking or allowing air intrusion. A worn, cracked, or hardened water tube seal is a common cause of overheating and cooling system leaks on outboard motors, and replacing it is a routine part of a lower unit reinstall or water pump service.\u003c\/p\u003e\u003cp\u003eMade from rubber for a durable, flexible seal against the water tube, the 18-0563 is manufactured to match OEM dimensions and cross-references directly to Mercury Marine part 26-36556, so it installs as a direct replacement without modification. Its compact size (0.39 x 0.39 x 0.39 inches) and light weight make it an inexpensive, easy-to-stock spare for anyone performing water pump impeller replacement or lower unit maintenance on compatible Mercury\/Mariner 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 18-0563\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Category:\u003c\/strong\u003e Mercury Outboard Cooling System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Rubber\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 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999874627\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e Mercury Marine 26-36556\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits Mercury\/Mariner outboard motors that use Mercury Marine water tube seal 26-36556.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e26-36556\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0563 water tube seal fit?\u003c\/strong\u003e The Sierra 18-0563 is designed for Mercury and Mariner outboard motors that use Mercury Marine water tube seal 26-36556.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0563 the same as Mercury part 26-36556?\u003c\/strong\u003e Yes, the Sierra 18-0563 cross-references directly to Mercury Marine part number 26-36556 and installs as a direct replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-0563 seal made from?\u003c\/strong\u003e It is made from rubber, which provides the flexibility needed to seal tightly around the water tube.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow big is the Sierra 18-0563 water tube seal?\u003c\/strong\u003e The seal measures 0.39 x 0.39 x 0.39 inches and weighs 0.01 pounds, making it a small, lightweight component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should this water tube seal be replaced?\u003c\/strong\u003e The 18-0563 should be replaced when it is cracked, hardened, or leaking, and it is commonly replaced during a lower unit reinstall or water pump impeller service on Mercury\/Mariner outboards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan a bad water tube seal cause overheating?\u003c\/strong\u003e Yes, a worn or damaged water tube seal like the 18-0563 replacement can allow air intrusion or coolant leakage that leads to overheating in the outboard cooling system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0563 an OEM or aftermarket part?\u003c\/strong\u003e The 18-0563 is an aftermarket seal manufactured by Sierra to the same specifications as Mercury Marine OEM part 26-36556.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0563 come with installation hardware?\u003c\/strong\u003e No, the 18-0563 is the rubber water tube seal only; no additional hardware is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if I need the 18-0563 versus a different seal?\u003c\/strong\u003e Confirm your outboard uses Mercury Marine water tube seal 26-36556; the Sierra 18-0563 is the direct match for that part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0563 seal reusable after removal?\u003c\/strong\u003e Water tube seals like the 18-0563 are generally replaced rather than reused once removed, since they can lose their sealing shape during disassembly.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988078768347,"sku":"SIE-18-0563","price":0.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0563_lg__39830.1558120582.500.750.jpg?v=1785189034"},{"product_id":"sierra-18-0844-thermostat-cover-gasket-replaces-yamaha-688-12414-a1-00-fits-yamaha-t60-t9-9-outboards","title":"Sierra Thermostat Cover Gasket 18-0844, Replaces Yamaha 688-12414-A1-00","description":"\u003cp\u003eThe Sierra 18-0844 is a thermostat cover gasket engineered to seal the thermostat housing on applicable Yamaha outboard engines. It forms the seal between the thermostat cover and the powerhead, preventing coolant leaks at this junction and ensuring the cooling system maintains proper pressure and flow around the thermostat. Sierra manufactures this gasket to meet or exceed the quality of the original equipment part it replaces, giving boat owners a reliable option when servicing the cooling system or replacing a worn or damaged gasket during a thermostat swap.\u003c\/p\u003e\u003cp\u003eThis gasket is a simple but essential wear item: over time, heat cycling and engine vibration can cause the original gasket material to harden, crack, or lose its seal, leading to coolant seepage around the thermostat cover. Replacing it whenever the thermostat cover is removed, such as during a thermostat replacement or cooling system inspection, is standard practice to avoid leaks after reassembly. The Sierra 18-0844 is sized and shaped to match the OEM thermostat cover gasket it replaces, so no modification is needed for installation.\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 18-0844\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Cover Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999874771\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha outboard engines using thermostat cover OEM part 688-12414-A1-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e688-12414-A1-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0844 gasket fit?\u003c\/strong\u003e The Sierra 18-0844 is a thermostat cover gasket for Yamaha outboard engines that use the OEM thermostat cover gasket 688-12414-A1-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0844 the same as the Yamaha OEM gasket?\u003c\/strong\u003e Yes, the Sierra 18-0844 replaces Yamaha OEM part 688-12414-A1-00 and is built to meet or exceed the original equipment part's quality.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets are included with part 18-0844?\u003c\/strong\u003e One thermostat cover gasket is included per Sierra 18-0844 package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the weight of the 18-0844 gasket?\u003c\/strong\u003e The 18-0844 thermostat cover gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should this gasket be replaced?\u003c\/strong\u003e Replace the 18-0844 gasket any time the thermostat cover is removed, such as during a thermostat inspection or replacement, since the old gasket material can lose its seal after being disturbed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if a worn thermostat cover gasket is not replaced?\u003c\/strong\u003e A worn or hardened thermostat cover gasket can allow coolant to leak at the thermostat housing, so installing a fresh 18-0844 gasket during service helps prevent seepage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-0844 include the thermostat itself?\u003c\/strong\u003e No, the 18-0844 is the cover gasket only; it does not include the thermostat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-0844 gasket made from?\u003c\/strong\u003e The 18-0844 thermostat cover gasket is made from OEM-equivalent gasket material to match the original Yamaha part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-0844 genuine Yamaha or aftermarket?\u003c\/strong\u003e The 18-0844 is a Sierra-manufactured aftermarket gasket, made to meet or exceed the specifications of the original Yamaha equipment it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-0844 gasket be reused after removal?\u003c\/strong\u003e Thermostat cover gaskets like the 18-0844 are designed for one-time installation; once removed, the seal is generally compromised and a new gasket should be installed.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988085780699,"sku":"SIE-18-0844","price":4.16,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0844_lg__45154.1558121240.500.750.jpg?v=1785188585"},{"product_id":"thermostat-gasket-for-mercury-outboard-replaces-27-14318-2-27-14318-3-sierra-18-0835","title":"Sierra Thermostat Gasket 18-0835 - Replaces Yamaha 62Y-12414-00-00 for Yamaha 2-Stroke Outboards","description":"\u003cp\u003eThe Sierra 18-0835 is a thermostat gasket built for Yamaha 2-stroke outboard cooling systems. It seals the mating surface between the thermostat and its housing, keeping coolant flow contained and preventing leaks that can lead to overheating. This gasket is the direct cross-reference equivalent of Yamaha OEM part number 62Y-12414-00-00, so it installs as a straightforward replacement using the same mounting points and sealing surface as the original equipment part.\u003c\/p\u003e\u003cp\u003eAs part of Sierra's outboard cooling system lineup, this gasket is intended to be replaced any time the thermostat is serviced or replaced, since a reused gasket can lose its seal integrity. It is a lightweight, single-use component sold individually (quantity of 1 per thermostat).\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 18-0835\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 62Y-12414-00-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Yamaha 2-Stroke Outboard Cooling System\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 808282265441\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity per Engine:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha 2-stroke outboard engines (cooling system \/ thermostat housing)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e62Y-12414-00-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0835 thermostat gasket fit?\u003c\/strong\u003e The Sierra 18-0835 is designed for Yamaha 2-stroke outboard cooling systems, sealing the thermostat housing on these engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-0835 replace?\u003c\/strong\u003e It replaces Yamaha OEM part number 62Y-12414-00-00, making it a direct cross-reference for that gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 62Y-12414-00-00 gasket the same as the Sierra 18-0835?\u003c\/strong\u003e Yes, Sierra part 18-0835 is the equivalent to Yamaha OEM number 62Y-12414-00-00 and can be used in its place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this thermostat gasket weigh?\u003c\/strong\u003e The 18-0835 thermostat gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets are included when ordering 18-0835?\u003c\/strong\u003e One 18-0835 thermostat gasket is included, matching the quantity of 1 per engine listed for this application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the thermostat gasket on a Yamaha 2-stroke outboard?\u003c\/strong\u003e The 18-0835 gasket should be replaced any time the thermostat is removed or serviced on a Yamaha 2-stroke outboard, since reinstalling a used gasket can compromise the seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0835 gasket come with a thermostat?\u003c\/strong\u003e No, 18-0835 is the gasket only; it does not include a thermostat as part of the package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does a thermostat gasket like 18-0835 actually do?\u003c\/strong\u003e It seals the joint between the thermostat and its housing on the Yamaha 2-stroke outboard cooling system, preventing coolant leaks at that connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-0835 a genuine cross-reference part or a generic substitute?\u003c\/strong\u003e It is sold as a direct cross-reference replacement for Yamaha OEM number 62Y-12414-00-00, matching that part's application in the Yamaha cooling system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-0835 thermostat gasket?\u003c\/strong\u003e The UPC for the 18-0835 thermostat gasket is 808282265441.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988085911771,"sku":"SIE-18-0835","price":4.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0835_lg__38602.1558121050.500.750.jpg?v=1785329185"},{"product_id":"sierra-18-0871-1-service-valve-with-o-ring-replaces-johnson-evinrude-175158-fits-outboards-with-primer-valve","title":"Sierra 18-0871-1 Service Valve with O-Ring, Replaces 438996 436852, Fits V4 \u0026 V6 60 Degree Engines 1988-2001","description":"\u003cp\u003eThe Sierra 18-0871-1 Service Valve with O-Ring is a direct-fit replacement valve used in the cooling system of V4 and V6 (60 degree) outboard engines built from 1988 to 2001. It replaces OEM valves 438996 and 436852, restoring proper thermostat-housing or water-circuit sealing when the original valve wears out or the O-ring fails. The valve ships complete with its O-ring, so there is no need to source a separate seal to complete the repair.\u003c\/p\u003e\u003cp\u003eThis is a small, precision-machined component designed to seat correctly in the factory bore and hold pressure through normal engine operating temperatures. Because it is sized and shaped to the exact factory specification, it installs in place of the original valve without modification. Marine technicians and boat owners performing a cooling system service, thermostat replacement, or overheating diagnosis on a compatible V4 or V6 60 degree engine can use this valve as a like-for-like replacement 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 18-0871-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e Service Valve with O-Ring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Service valve with O-ring (1 each)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.65 x 7.2 x 5.9 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 808282378264\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 438996, 436852\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eV4 \u0026amp; V6 (60 degree) engines, 1988-2001\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e438996\u003c\/li\u003e\n\u003cli\u003e436852\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0871-1 service valve fit?\u003c\/strong\u003e The Sierra 18-0871-1 Service Valve with O-Ring fits V4 \u0026amp; V6 (60 degree) engines built from 1988 to 2001.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this valve include the O-ring?\u003c\/strong\u003e Yes, the 18-0871-1 ships as a complete service valve with its O-ring already included, so no separate seal needs to be purchased.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-0871-1 replace?\u003c\/strong\u003e It replaces OEM numbers 438996 and 436852.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0871-1 a direct OEM replacement or an aftermarket equivalent?\u003c\/strong\u003e It is an aftermarket part manufactured by Sierra that is a direct equivalent to OEM valves 438996 and 436852 for V4 \u0026amp; V6 (60 degree) engines, 1988-2001.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-0871-1 service valve?\u003c\/strong\u003e The Sierra 18-0871-1 measures 0.65 x 7.2 x 5.9 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0871-1 service valve weigh?\u003c\/strong\u003e 0.01 pounds is the shipping weight of the Sierra 18-0871-1 Service Valve with O-Ring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many valves come in one package?\u003c\/strong\u003e One Sierra 18-0871-1 Service Valve with O-Ring is included per unit, a count of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace this service valve?\u003c\/strong\u003e Replacement is typically needed when the O-ring seal degrades or the valve itself wears, causing coolant leaks or overheating in V4 \u0026amp; V6 (60 degree) engines from 1988-2001; the 18-0871-1 is used to restore the seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-0871-1 valve compatible with other engine types besides V4 \u0026amp; V6 (60 degree)?\u003c\/strong\u003e Fitment for the Sierra 18-0871-1 is specified for V4 \u0026amp; V6 (60 degree) engines, 1988-2001; other engine types are not listed for this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is used to identify the Sierra 18-0871-1?\u003c\/strong\u003e The UPC for the Sierra 18-0871-1 Service Valve with O-Ring is 808282378264.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086010075,"sku":"SIE-18-0871-1","price":7.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0871_lg__89252.1684765090.500.750.jpg?v=1785188701"},{"product_id":"thermostat-cover-gasket-2-pack-replaces-rm0003-marine-engine","title":"Sierra Thermostat Gasket 18-0878-9, Replaces RM0003, Pack of 2","description":"\u003cp\u003eThis Sierra thermostat gasket seals the thermostat housing on the engine, creating the seal needed to prevent coolant leaks at the mating surface between the thermostat cover and the engine block or housing. It is sold as part number 18-0878-9 and is packaged two gaskets per package, so you have a spare on hand or enough for a job that requires servicing more than one housing. Thermostat gaskets are a wear item that should be replaced any time the thermostat cover is removed, since reusing an old gasket can result in a coolant leak or an improper seal even if the gasket appears undamaged. This part is a direct equivalent for OEM number RM0003, making it a straightforward replacement when that OEM number is called for. Keeping a correct-fit thermostat gasket on hand is a low-cost way to avoid downtime during routine cooling system maintenance, thermostat replacement, or housing inspection.\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 18-0878-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 gaskets per package\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 808282161828\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eRM0003\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in this package?\u003c\/strong\u003e Sierra part number 18-0878-9 is sold two gaskets per package, priced per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM number does this thermostat gasket replace?\u003c\/strong\u003e This gasket replaces OEM number RM0003.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this gasket a genuine OEM part or an aftermarket equivalent?\u003c\/strong\u003e The 18-0878-9 is a Sierra-branded replacement gasket that is a direct equivalent for OEM number RM0003, not an OEM-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this gasket weigh?\u003c\/strong\u003e The 18-0878-9 thermostat gasket weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the thermostat gasket?\u003c\/strong\u003e Any time the thermostat cover is removed for inspection or thermostat replacement, the gasket should be replaced rather than reused, since a used gasket can leak even without visible damage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is this gasket used for?\u003c\/strong\u003e It seals the thermostat housing to prevent coolant leaks at the mating surface between the thermostat cover and the engine, and is identified by Sierra part number 18-0878-9.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I buy just one gasket instead of the pack of two?\u003c\/strong\u003e Part number 18-0878-9 is sold and priced only as a package of 2 gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket fit if my engine calls for OEM part RM0003?\u003c\/strong\u003e Yes, part number 18-0878-9 is the listed replacement for OEM number RM0003.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e Ordering 18-0878-9 gets you one package containing 2 thermostat gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of engine part is this?\u003c\/strong\u003e The 18-0878-9 gasket is categorized as an engine accessory, specifically a thermostat gasket.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086042843,"sku":"SIE-18-0878-9","price":3.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0878_lg__90235.1692043126.500.750.jpg?v=1785329186"},{"product_id":"sierra-18-0916-water-pump-gasket-replaces-mercruiser-27-805215-1-sterndrive-water-pump-base-gasket","title":"Sierra 18-0916 Water Pump Gasket, Replaces Mercruiser 27-8052151, 27-805215, 27-94915, 27-72779","description":"\u003cp\u003eThe Sierra 18-0916 Water Pump Gasket is a round marine engine gasket designed to seal the water pump housing on inboard and sterndrive engines. It is built to meet or exceed the quality of the original equipment part it replaces, making it a reliable choice for engine maintenance and water pump rebuilds. This gasket is supplied as a single unit and is intended for direct replacement of a specific set of Mercruiser gaskets, so it is commonly used when servicing or rebuilding a water pump assembly on compatible marine engines. Because a worn or damaged water pump gasket can allow coolant or raw water to leak past the pump housing, replacing it with a properly sized, OEM-quality gasket like the 18-0916 helps maintain a correct seal and proper cooling flow. Boat owners and marine technicians use this gasket when installing a new water pump, rebuilding an existing pump, or performing routine cooling system 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 18-0916\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Gasket\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 747730043470\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-8052151\u003c\/li\u003e\n\u003cli\u003e27-805215\u003c\/li\u003e\n\u003cli\u003e27-94915\u003c\/li\u003e\n\u003cli\u003e27-72779\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-0916 used for?\u003c\/strong\u003e It is a water pump gasket used to seal the water pump housing on a marine engine, sealing out leaks between the pump body and the engine block or housing it mounts to.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0916 gasket replace Mercruiser part numbers?\u003c\/strong\u003e Yes, the Sierra 18-0916 is a direct replacement for Mercruiser 27-8052151, 27-805215, 27-94915, and 27-72779.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one order of the 18-0916?\u003c\/strong\u003e One Sierra 18-0916 Water Pump Gasket is included per unit, sold individually rather than as a multi-pack.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape is the 18-0916 water pump gasket?\u003c\/strong\u003e The gasket has a round shape, matching the circular profile of the water pump housing it seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0916 weigh?\u003c\/strong\u003e This gasket weighs 0.02 pounds, consistent with a thin, lightweight sealing component.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0916 an OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-0916 is a Sierra-manufactured replacement gasket engineered to meet or exceed the quality of the original Mercruiser gasket it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-0916 fit any water pump gasket application?\u003c\/strong\u003e It is intended specifically for applications that originally used Mercruiser 27-8052151, 27-805215, 27-94915, or 27-72779, so confirm your engine's original gasket number matches one of these before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with the Sierra 18-0916?\u003c\/strong\u003e The Sierra 18-0916 Water Pump Gasket carries UPC 747730043470.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-0916 be used when rebuilding a water pump?\u003c\/strong\u003e Yes, this gasket is commonly installed during a water pump rebuild or replacement to restore a proper seal at the pump housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-0916 water pump gasket made from?\u003c\/strong\u003e The specific gasket material is not specified for the Sierra 18-0916; buyers needing exact material composition should confirm with additional engine documentation.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086272219,"sku":"SIE-18-0916","price":5.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0916_lg__94277.1558119254.500.750.jpg?v=1785188517"},{"product_id":"sierra-18-0891-9-water-pump-mounting-gasket-pack-of-2-replaces-volvo-penta-omc-3852477-and-chris-craft-16-50-00078","title":"Sierra 18-0891-9 Water Pump Mounting Gasket, Replaces 27-34897, GM 4.3L 5.0L 5.8L, Pack of 2","description":"\u003cp\u003eThe Sierra 18-0891-9 Water Pump Mounting Gasket seals the water pump housing to the engine block on GM 4.3L, 5.0L, and 5.8L marine engines. Sold in a package of 2, this gasket is built to meet or exceed original equipment quality, giving a reliable, leak-free seal at the pump-to-block mating surface during routine water pump service, rebuilds, or replacement. Keeping a spare on hand is worthwhile since the gasket should always be replaced whenever the water pump is removed, rather than reused.\u003c\/p\u003e\u003cp\u003eThis mounting gasket is a direct cross-reference match for several OEM and aftermarket numbers, so it fits in place of the Mercruiser 27-34897, 27-34896, FI5000077, and FI5000078 gaskets used on the same GM-based engine platforms. Because it ships two to a package, one purchase covers both sides of a dual-pump job or provides a spare for the next service interval. As with any gasket, proper surface prep on the block and pump housing before installation helps ensure a tight, long-lasting 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 18-0891-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Mounting 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\u003eEngine Fitment:\u003c\/strong\u003e GM 4.3L, 5.0L \u0026amp; 5.8L\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 808282161897\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 27-34897, 27-34896, FI5000077, FI5000078\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 90 days\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGM 4.3L, 5.0L \u0026amp; 5.8L engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-34897\u003c\/li\u003e\n\u003cli\u003e27-34896\u003c\/li\u003e\n\u003cli\u003eFI5000077\u003c\/li\u003e\n\u003cli\u003eFI5000078\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-0891-9 water pump mounting gasket fit?\u003c\/strong\u003e The Sierra 18-0891-9 is designed for GM 4.3L, 5.0L, and 5.8L marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of 18-0891-9?\u003c\/strong\u003e Each package of the Sierra 18-0891-9 water pump mounting gasket contains 2 gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0891-9 gasket a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra-manufactured aftermarket replacement gasket, made to meet or exceed original equipment quality rather than being a Mercruiser-branded OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich Mercruiser part numbers does the 18-0891-9 gasket cross-reference?\u003c\/strong\u003e It replaces Mercruiser 27-34897, 27-34896, FI5000077, and FI5000078.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to replace this gasket every time I service the water pump?\u003c\/strong\u003e Yes, a water pump mounting gasket like the Sierra 18-0891-9 should be replaced whenever the water pump is removed, since a used gasket will not reseal reliably.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-0891-9?\u003c\/strong\u003e Ordering the Sierra 18-0891-9 gets you a package of 2 water pump mounting gaskets sized for GM 4.3L, 5.0L \u0026amp; 5.8L engines; no additional hardware is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-0891-9 gasket weigh?\u003c\/strong\u003e The Sierra 18-0891-9 water pump mounting gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat warranty applies to the Sierra 18-0891-9?\u003c\/strong\u003e The Sierra 18-0891-9 water pump mounting gasket carries a 90 day warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-0891-9 gasket on an engine other than GM 4.3L, 5.0L, or 5.8L?\u003c\/strong\u003e The 18-0891-9 is specified for GM 4.3L, 5.0L \u0026amp; 5.8L engines; fitment outside that range is not confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-0891-9 come as a single gasket or a set?\u003c\/strong\u003e The 18-0891-9 is sold as a set, packaged 2 gaskets per unit.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086337755,"sku":"SIE-18-0891-9","price":4.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0891-9__32156.1737886565.500.750.jpg?v=1785188055"},{"product_id":"thermostat-cover-gasket-for-omc-evinrude-outboards-replaces-oem-329830-sierra-18-1202","title":"Sierra Thermostat Gasket 18-1202, Replaces 332369, V-4 Engines, Pack of 2","description":"\u003cp\u003eThe Sierra 18-1202 thermostat gasket seals the thermostat housing to the engine block, preventing coolant leaks and maintaining proper cooling system pressure on V-4 marine engines. This gasket is a direct fit replacement designed to restore a tight, leak-free seal whenever a thermostat is serviced, replaced, or inspected. Because a worn or hardened gasket is one of the most common causes of coolant seepage around the thermostat housing, replacing it at the same time as the thermostat -- or whenever the housing is removed for any reason -- helps prevent repeat leaks and re-work. The 18-1202 is sold as a pack of 2, giving the installer a spare on hand or enough material to service two thermostat housings in one job. It is built to the dimensions and specifications of the original equipment gasket it replaces, so it seats correctly against the mating surfaces without additional trimming or fitting. This gasket is intended for V-4 marine engine applications and directly replaces OEM part number 332369. Keeping a genuine Sierra gasket in inventory ensures the correct thickness and material compression for a proper seal, avoiding the leaks and reduced engine performance that can result from using an incorrectly sized or generic gasket.\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 18-1202\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e V-4\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\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eV-4 marine engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e332369\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-1202 thermostat gasket fit?\u003c\/strong\u003e The Sierra 18-1202 thermostat gasket is designed for V-4 marine engines and directly replaces OEM part number 332369.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a pack of the 18-1202?\u003c\/strong\u003e Each pack of the Sierra 18-1202 thermostat gasket contains 2 gaskets, enough to service two thermostat housing installations or keep a spare on hand.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs OEM number 332369 the same part as Sierra 18-1202?\u003c\/strong\u003e Yes, the Sierra 18-1202 thermostat gasket is a direct replacement for OEM part number 332369.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is this gasket used on the engine?\u003c\/strong\u003e This gasket seals the thermostat housing to the engine block on V-4 marine engines, sealing the coolant passage around the thermostat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the thermostat gasket be replaced?\u003c\/strong\u003e The 18-1202 gasket should be replaced any time the thermostat housing is removed, such as during thermostat replacement, inspection, or if coolant leakage is present around the housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the pack include the thermostat itself?\u003c\/strong\u003e No, the Sierra 18-1202 is a gasket only; it does not include the thermostat. It is intended to be used when installing or servicing a thermostat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1202 gasket weigh?\u003c\/strong\u003e The Sierra 18-1202 thermostat gasket weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1202 a genuine OEM part or aftermarket?\u003c\/strong\u003e The 18-1202 is a Sierra-branded replacement part manufactured to match the fit and function of OEM part 332369 for V-4 marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this gasket be reused after removal?\u003c\/strong\u003e Gaskets compress to form a seal during installation, so the 18-1202 thermostat gasket should be replaced with a new one each time the thermostat housing is removed rather than reused.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this gasket fit engines other than V-4?\u003c\/strong\u003e The Sierra 18-1202 thermostat gasket is specified for V-4 marine engines; fitment outside that engine type is not listed for this part number.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988086927579,"sku":"SIE-18-1202","price":5.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1202__89857.1737886973.500.750.jpg?v=1785189022"},{"product_id":"thermostat-diaphragm-gasket-for-evinrude-johnson-v-4-v-6-loop-charge-replaces-omc-394408-sierra-18-1222","title":"Sierra 18-1222 Thermostat Diaphragm Gasket, Johnson\/Evinrude V4\/V6 200\/225 HP 1988-93, Replaces OMC 394408","description":"\u003cp\u003eThe Sierra 18-1222 is a round thermostat diaphragm gasket for Johnson\/Evinrude V4\/V6 loop charge outboard engines. It seals the thermostat housing to the powerhead, maintaining proper cooling system pressure and preventing water leakage around the thermostat. This gasket is manufactured to meet or exceed original equipment specifications, making it a direct equivalent for the OEM diaphragm gasket used on covered Johnson\/Evinrude V4\/V6 outboards.\u003c\/p\u003e\u003cp\u003eThe gasket is a round, white component sized to match the OEM thermostat housing footprint on applicable Johnson\/Evinrude V4\/V6 powerheads. It is commonly replaced whenever the thermostat itself is serviced, since a worn or hardened gasket is a frequent source of coolant leaks and overheating on outboard motors. Fitment covers 200 HP and 225 HP Johnson\/Evinrude outboards for the 1988-93 model years.\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 18-1222\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Diaphragm Gasket\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 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999752376\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e GLM 46130, 394408\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude V4\/V6 loop charge outboard, 200 HP, 1988-93\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude V4\/V6 loop charge outboard, 225 HP, 1988-93\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 46130\u003c\/li\u003e\n\u003cli\u003e394408\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1222 thermostat diaphragm gasket fit?\u003c\/strong\u003e The Sierra 18-1222 fits Johnson\/Evinrude V4\/V6 loop charge outboard engines rated at 200 HP and 225 HP for the 1988-93 model years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1222 a direct OEM equivalent?\u003c\/strong\u003e Yes, the 18-1222 is interchangeable with GLM 46130 and OEM number 394408, and it meets or exceeds the quality of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does 18-1222 cross-reference to?\u003c\/strong\u003e 18-1222 crosses to GLM 46130 and OMC\/Evinrude\/Johnson 394408.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat shape and color is this gasket?\u003c\/strong\u003e The 18-1222 thermostat diaphragm gasket is round and white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1222 gasket weigh?\u003c\/strong\u003e It weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould the thermostat diaphragm gasket be replaced when installing a new thermostat?\u003c\/strong\u003e Yes, replacing the 18-1222 gasket whenever the thermostat is serviced helps prevent coolant leaks caused by a worn or hardened seal at the thermostat housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the Sierra 18-1222?\u003c\/strong\u003e The 18-1222 is sold as a single thermostat diaphragm gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1222 genuine Sierra or aftermarket?\u003c\/strong\u003e It is a genuine Sierra-branded part manufactured to meet or exceed the OEM specification for part 394408, not a generic aftermarket substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-1222 gasket?\u003c\/strong\u003e The UPC is 030999752376.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1222 gasket work on 235 HP or 200 HP 1977-83 Johnson\/Evinrude engines?\u003c\/strong\u003e No, the 18-1222 is specified for 200 HP and 225 HP Johnson\/Evinrude V4\/V6 outboards built 1988-93; earlier 200 HP (1977-83) and 235 HP applications use a different Sierra thermostat gasket.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988087058651,"sku":"SIE-18-1222","price":14.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1222_lg__91690.1558121932.500.750.jpg?v=1785188297"},{"product_id":"grommet-for-evinrude-johnson-omc-v-6-crossflow-outboards-replaces-omc-320880-sierra-18-1221-18-1221-9-2-pack","title":"Sierra Retainer Gasket 18-1221-9, 2-Pack, Fits Johnson\/Evinrude 200 HP and 225 HP (1988-93)","description":"\u003cp\u003eThe Sierra Retainer Gasket 18-1221-9 is a two-pack replacement gasket used with the thermostat retainer on select Johnson\/Evinrude (OMC\/BRP) outboard powerheads. This gasket seals the retainer housing that holds the thermostat in place within the cooling system, helping maintain proper sealing pressure and preventing coolant leakage around the retainer during operation. Sold as a set of two, it gives an installer a spare on hand for a follow-up service or a second engine, which is useful since gaskets should be replaced any time the retainer is removed rather than reused. This part is specifically called out in Sierra's application charts for Johnson\/Evinrude 200 HP outboards built 1988-93 and 225 HP outboards built 1988-93, distinguishing it from the separate part number used on earlier 185 HP, 200 HP (1977-83), and 235 HP models in the same engine family. Confirming the exact HP and year of the outboard before ordering ensures the correct retainer gasket is installed, since Sierra lists a different part number for those other model years. As with any gasket, proper surface prep and correct torque on the retainer hardware during reassembly are important to achieve a good 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 18-1221-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Thermostat Retainer Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282162368\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Johnson\/Evinrude (OMC\/BRP) 200 HP (1988-93), 225 HP (1988-93)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude (OMC\/BRP) 200 HP, 1988-93\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude (OMC\/BRP) 225 HP, 1988-93\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eNo OEM cross-reference numbers are listed for this part.\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-1221-9 retainer gasket used for?\u003c\/strong\u003e It seals the thermostat retainer on the powerhead of compatible Johnson\/Evinrude (OMC\/BRP) outboards, part 18-1221-9, helping the retainer housing hold pressure and keep coolant from leaking around the thermostat area.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in the Sierra 18-1221-9 package?\u003c\/strong\u003e Two retainer gaskets are included in each 18-1221-9 package, giving you a spare for a future service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich outboards does part 18-1221-9 fit?\u003c\/strong\u003e Sierra's application chart lists 18-1221-9 for Johnson\/Evinrude (OMC\/BRP) 200 HP outboards built 1988-93 and 225 HP outboards built 1988-93.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-1221-9 fit earlier 200 HP Johnson\/Evinrude outboards from the 1970s and 80s?\u003c\/strong\u003e No. Sierra's chart shows a different retainer gasket part number for 200 HP models built 1977-83, so 18-1221-9 is specific to the 1988-93 200 HP and 225 HP applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-1221-9 the same gasket used on 185 HP or 235 HP Johnson\/Evinrude models?\u003c\/strong\u003e No. Those horsepower ratings (185 HP 1984-85 and 235 HP 1978-85) use a different Sierra part number in the same application chart, not 18-1221-9.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1221-9 gasket set weigh?\u003c\/strong\u003e The 18-1221-9 two-pack weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould the retainer gasket be reused after removing the thermostat retainer?\u003c\/strong\u003e No, a fresh gasket like the Sierra 18-1221-9 should be installed any time the thermostat retainer is removed, since a used gasket may not reseal properly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1221-9 gasket genuine OEM or an aftermarket replacement?\u003c\/strong\u003e The 18-1221-9 is a Sierra-branded replacement gasket manufactured to fit the specified Johnson\/Evinrude outboard applications; no OEM cross-reference number is listed for it in Sierra's catalog.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part 18-1221-9?\u003c\/strong\u003e Ordering 18-1221-9 gets you a package of two thermostat retainer gaskets; no other hardware or thermostat is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat UPC is associated with the Sierra 18-1221-9 gasket 2-pack?\u003c\/strong\u003e The UPC for the 18-1221-9 two-pack is 808282162368.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988087091419,"sku":"SIE-18-1221-9","price":2.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1221-9_lg__11130.1722348497.500.750.jpg?v=1785329181"},{"product_id":"sierra-18-1507-thermostat-seal-replaces-omc-335981-fits-evinrude-johnson-60-degree-v-4-v-6-outboards","title":"Sierra 143 Degree Marine Thermostat, Replaces 436195, Part Number 18-1507","description":"\u003cp\u003eThe Sierra 18-1507 is a 143 degree F marine engine thermostat, engineered as a direct replacement for outboard and sterndrive cooling systems that call for a 143 degree opening temperature. The thermostat regulates coolant flow through the engine block, staying closed until the powerhead reaches its designed operating temperature and then opening to allow water flow to the cooling passages. Maintaining the correct opening temperature is critical for marine engines: running too cool can lead to poor combustion and increased wear, while a failed or stuck thermostat can cause overheating and serious engine damage.\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 18-1507\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Rating:\u003c\/strong\u003e 143 degrees F\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 808282167127\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 436195\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned as a direct fit for engines specifying a 143 degree F opening thermostat.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e436195\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat temperature does the Sierra 18-1507 thermostat open at?\u003c\/strong\u003e The Sierra 18-1507 opens at 143 degrees F, which is the rated temperature stamped for this part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-1507 replace?\u003c\/strong\u003e It replaces OEM number 436195, so it can be used as a direct substitute for that original thermostat.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does this thermostat weigh?\u003c\/strong\u003e The Sierra 18-1507 thermostat weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many thermostats come in a package?\u003c\/strong\u003e Each Sierra 18-1507 package contains a single thermostat unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1507 a genuine Sierra part or aftermarket?\u003c\/strong\u003e It is a Sierra-branded thermostat manufactured under Sierra's own part number, 18-1507.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this part?\u003c\/strong\u003e The Sierra 18-1507 thermostat carries UPC 808282167127.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if a marine thermostat like the 18-1507 fails?\u003c\/strong\u003e A stuck or failed thermostat can prevent proper coolant flow, leading to engine overheating or, if stuck open, slower warm-up and reduced efficiency, which is why matching the correct 143 degree rating for part 18-1507 matters.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use a different temperature rated thermostat instead of the 143 degree 18-1507?\u003c\/strong\u003e The 18-1507 is specifically rated at 143 degrees F, and using a different opening temperature than the engine manufacturer specifies is not recommended since it changes engine warm-up and operating temperature behavior.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1507 include a gasket or seal?\u003c\/strong\u003e The listing for part 18-1507 covers the thermostat itself; a separate thermostat seal (such as Sierra 18-1734 or 18-1506) may be needed depending on the engine application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if 18-1507 is the right thermostat for my engine?\u003c\/strong\u003e Confirm your engine calls for a 143 degree F thermostat or originally used OEM part 436195, since Sierra 18-1507 is built to that specification.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988087812315,"sku":"SIE-18-1507","price":5.39,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-1507_lg__71663.1558121453.500.750.jpg?v=1785189093"},{"product_id":"sierra-18-15111-v-belt-for-4-3l-v-6-5-7l-v-8-sterndrive-crank-to-alternator-drive-oe-ysc-10260-00-0c","title":"Sierra V-Belt 18-15111, Replaces YSC-10260-10-0C, for V-6 Sterndrive 4.3L\/V-8, 5.7L Crank\/Power Steering","description":"\u003cp\u003eThe Sierra V-Belt 18-15111 is a cogged marine engine belt built for sterndrive applications, specifically the crank\/power steering drive on V-6 Sterndrive 4.3L and V-8 5.7L engines. Sierra constructs this belt with high strength synthetic cords that resist shockload failure and hold low stretch properties, so the belt keeps uniform tension and performance over its service life. The compression section uses a special rubber compound engineered to transfer load forces smoothly and evenly from the pulley to the cords, reducing wear at the drive points.\u003c\/p\u003e\u003cp\u003eThe cogged profile is molded to precise engineering tolerances, which improves the belt's flexibility around smaller pulleys while still maintaining full cord support. The cog geometry also opens up a larger surface area for air circulation, which helps keep the belt cool and prevents damaging heat build-up in the cushion section during continuous operation. Rubber edges along the belt maintain positive, no-slip contact with the pulley grooves for reliable, consistent energy transfer to the crank and power steering pump.\u003c\/p\u003e\u003cp\u003eThis belt is a direct replacement for OEM part number YSC-10260-10-0C on the specified crank\/power steering application. It is sized at 0.39 x 0.39 x 0.39 inches and weighs 0.3 pounds.\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 18-15111\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e V-Belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e V-6 Sterndrive 4.3L\/V-8, 5.7L (Crank\/Power Steering)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e YSC-10260-10-0C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.3 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 808282145460\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Cogged, synthetic cord reinforced rubber\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eV-6 Sterndrive 4.3L\/V-8, 5.7L engines, crank\/power steering application\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYSC-10260-10-0C\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-15111 V-belt fit?\u003c\/strong\u003e The Sierra 18-15111 V-belt is built for the V-6 Sterndrive 4.3L\/V-8, 5.7L crank\/power steering application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-15111 an OEM or aftermarket belt?\u003c\/strong\u003e 18-15111 is a Sierra-manufactured belt made as a direct replacement for OEM part YSC-10260-10-0C, matching the original fit and function for the crank\/power steering drive.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the Sierra 18-15111 replace?\u003c\/strong\u003e It replaces OEM number YSC-10260-10-0C on the V-6 Sterndrive 4.3L\/V-8, 5.7L crank\/power steering application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this belt?\u003c\/strong\u003e The Sierra 18-15111 V-belt measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-15111 V-belt weigh?\u003c\/strong\u003e This belt weighs 0.3 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the belt made of?\u003c\/strong\u003e Construction is a cogged, synthetic cord reinforced rubber design, with a special rubber compression compound and rubber edges that grip the pulley grooves.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does this belt have a cogged design instead of a smooth profile?\u003c\/strong\u003e The cogs on the 18-15111 are molded to precise tolerances so the belt flexes more easily around pulleys while keeping full cord support, and the cog geometry increases air circulation to prevent heat build-up in the cushion section.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this belt slip on the pulley over time?\u003c\/strong\u003e No, the rubber edges on the 18-15111 are designed to maintain positive, no-slip contact with the pulley grooves for reliable energy transfer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the belt stretch out after installation?\u003c\/strong\u003e The high strength synthetic cords in the 18-15111 have low stretch properties, so the belt maintains uniform performance rather than loosening over its service life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part 18-15111?\u003c\/strong\u003e Ordering 18-15111 includes one Sierra V-belt sized for the V-6 Sterndrive 4.3L\/V-8, 5.7L crank\/power steering application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this the correct belt for the power steering pump drive, or is it for a different pulley?\u003c\/strong\u003e The 18-15111 is specified for the crank\/power steering application on the V-6 Sterndrive 4.3L\/V-8, 5.7L engine.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988088041691,"sku":"SIE-18-15111","price":17.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-15111_lg__02435.1722516194.500.750.jpg?v=1785189189"},{"product_id":"mercruiser-v-belt-29-in-replaces-57-13457-57-53215-18-15290","title":"Sierra V-Belt 18-15290 for MerCruiser 8.2L MIE and 8.2L MPI MIE Engines","description":"\u003cp\u003eThe Sierra 18-15290 is a V-belt engineered as a direct fit replacement for MerCruiser 8.2L MIE and 8.2L MPI MIE sterndrive and inboard engines. This belt drives engine-mounted accessories such as the alternator and water circulation components, keeping charging and cooling systems running as the engine designer intended. Choosing the correct belt part number for your specific engine serial number range matters because MerCruiser revised belt specifications across production runs, and an incorrect belt can slip, wear prematurely, or fail to properly tension accessory drives.\u003c\/p\u003e\u003cp\u003eThis part number is confirmed for the MerCruiser 8.2L MIE (502 cid, 8-cylinder, 4-barrel) built within serial numbers C878221 through D857199, and for the MerCruiser 8.2L MPI MIE (502 cid, 8-cylinder, 4-barrel) built within serial numbers K147350 through K999999. Boat owners and marine technicians can use the engine serial number stamped on the block to confirm this belt is the correct match before ordering, since MerCruiser used different belt part numbers across other serial ranges on these same engine families.\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 18-15290\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e V-Belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.18 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999566256\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser 8.2L MIE (502 cid, 8-cylinder, 4-barrel), serial numbers C878221-D857199, 1990-1993\u003c\/li\u003e\n\u003cli\u003eMerCruiser 8.2L MPI MIE (502 cid, 8-cylinder, 4-barrel), serial numbers K147350-K999999, 1997\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-15290 V-belt fit?\u003c\/strong\u003e The Sierra 18-15290 fits the MerCruiser 8.2L MIE (502 cid, 8-cylinder, 4-barrel) built within serial numbers C878221-D857199, and the MerCruiser 8.2L MPI MIE (502 cid, 8-cylinder, 4-barrel) built within serial numbers K147350-K999999.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if 18-15290 is the right belt for my MerCruiser 8.2L engine?\u003c\/strong\u003e Check the engine serial number stamped on the block against the ranges C878221-D857199 (8.2L MIE) or K147350-K999999 (8.2L MPI MIE); if your engine falls in one of those ranges, the Sierra 18-15290 is the correct belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat years does the Sierra 18-15290 V-belt cover?\u003c\/strong\u003e This belt covers MerCruiser 8.2L MIE engines from 1990-1993 and MerCruiser 8.2L MPI MIE engines from 1997, based on the serial number ranges for those production years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-15290 V-belt weigh?\u003c\/strong\u003e The Sierra 18-15290 V-belt weighs 0.18 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-15290 a genuine Sierra part?\u003c\/strong\u003e Yes, 18-15290 is a Sierra brand V-belt manufactured for marine applications, not a generic aftermarket substitute.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the 18-15290 V-belt drive on the engine?\u003c\/strong\u003e On the MerCruiser 8.2L MIE and 8.2L MPI MIE engines it fits, this V-belt drives engine-mounted accessories such as the alternator and cooling components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-15290 fit other MerCruiser 8.2L engine variants?\u003c\/strong\u003e No, 18-15290 is specified only for the 8.2L MIE (serial numbers C878221-D857199) and 8.2L MPI MIE (serial numbers K147350-K999999); other 8.2L serial ranges use different Sierra belt part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-15290 V-belt?\u003c\/strong\u003e The UPC for the Sierra 18-15290 V-belt is 030999566256.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I install the Sierra 18-15290 V-belt myself?\u003c\/strong\u003e The 18-15290 is a standard accessory drive V-belt that can be installed using typical belt tensioning and replacement procedures for MerCruiser 8.2L MIE and 8.2L MPI MIE engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does the engine serial number matter for ordering this belt?\u003c\/strong\u003e MerCruiser 8.2L engines went through multiple belt specification changes across production, so the Sierra 18-15290 is matched to specific serial number ranges (C878221-D857199 for 8.2L MIE, K147350-K999999 for 8.2L MPI MIE) rather than fitting all 8.2L engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988088238299,"sku":"SIE-18-15290","price":18.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-15290__82607.1737844508.500.750.jpg?v=1785329189"},{"product_id":"sierra-18-15400-v-belt-replaces-mercury-57-32850-57-69143t-40-in-effective-length-omc-gas","title":"Sierra 18-15400 V-Belt for 8.2L 502 CID MIE\/MPI\/600 SC Engines, Replaces Mercury Marine 57-32850","description":"\u003cp\u003eThe Sierra 18-15400 is a V-Belt designed as a drive belt replacement for 8.2L 502 CID, 8-cylinder marine engines. It is built to transfer power reliably between the crankshaft pulley and accessory components such as the water pump, alternator, or power steering pump on applicable engine applications. The belt is finished in black and is supplied as a single unit (1 count).\u003c\/p\u003e\u003cp\u003eThis V-Belt is engineered as a direct cross-reference replacement for the Mercury Marine 57-32850 and 57-69143T belts as well as the OMC 311606 belt, allowing owners to source a compatible replacement without needing the original manufacturer part number. It fits specific serial-number ranges across three 502 CID engine applications: the 8.2L 600 SC (1992-2000), the 8.2L MIE (1993-1997), and the 8.2L MPI MIE (1996-1997). Confirming the engine serial number against these ranges before ordering ensures the correct belt is installed.\u003c\/p\u003e\u003cp\u003eSierra manufactures this belt for straightforward removal-and-replacement service, making it a practical stocking item for scheduled maintenance or belt failure repairs on these MerCruiser-family 502 CID 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 18-15400\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e V-Belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Style:\u003c\/strong\u003e V-Belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.19 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 502 CID\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinders:\u003c\/strong\u003e 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 57-32850, 57-69143T, 311606\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Serial Range, 8.2L 600 SC:\u003c\/strong\u003e D725676 - L601186\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Serial Range, 8.2L MIE:\u003c\/strong\u003e D857200 - K999999\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Serial Range, 8.2L MPI MIE:\u003c\/strong\u003e F819620 - K147349\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e8.2L 600 SC, 502 CID, 8-cylinder, 1992-2000, serial range D725676 - L601186\u003c\/li\u003e\n\u003cli\u003e8.2L MIE, 502 CID, 8-cylinder, 1993-1997, serial range D857200 - K999999\u003c\/li\u003e\n\u003cli\u003e8.2L MPI MIE, 502 CID, 8-cylinder, 1996-1997, serial range F819620 - K147349\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e57-32850\u003c\/li\u003e\n\u003cli\u003e57-69143T\u003c\/li\u003e\n\u003cli\u003e311606\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-15400 V-belt fit?\u003c\/strong\u003e The Sierra 18-15400 fits three 502 CID, 8-cylinder engine applications: the 8.2L 600 SC (1992-2000, serial range D725676 - L601186), the 8.2L MIE (1993-1997, serial range D857200 - K999999), and the 8.2L MPI MIE (1996-1997, serial range F819620 - K147349).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-15400 the same as the Mercury Marine 57-32850 belt?\u003c\/strong\u003e Yes, the Sierra 18-15400 is a direct cross-reference replacement for the Mercury Marine 57-32850 belt, along with the Mercury Marine 57-69143T and OMC 311606 belts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-15400 replace an OMC belt number?\u003c\/strong\u003e Yes, part 18-15400 cross-references to OMC belt number 311606 in addition to the Mercury Marine numbers 57-32850 and 57-69143T.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-15400 V-belt weigh?\u003c\/strong\u003e The Sierra 18-15400 V-belt weighs 0.19 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-15400 belt?\u003c\/strong\u003e The Sierra 18-15400 V-belt is black.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many belts come in the package?\u003c\/strong\u003e The Sierra 18-15400 is sold as a single V-belt (one unit per package).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if this belt fits my engine serial number?\u003c\/strong\u003e Check your engine's serial number against the ranges listed for the 18-15400: D725676 - L601186 for the 8.2L 600 SC, D857200 - K999999 for the 8.2L MIE, or F819620 - K147349 for the 8.2L MPI MIE, since fitment for this belt is serial-number specific within each model.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-15400 a V-belt or a serpentine belt?\u003c\/strong\u003e The 18-15400 is a V-belt style belt, not a serpentine belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the engine displacement for the applications this belt fits?\u003c\/strong\u003e All listed applications for the Sierra 18-15400 are 502 CID, 8-cylinder engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-15400 on a 1998-2001 8.2L 502 MAG MPI engine?\u003c\/strong\u003e No, the 8.2L 502 MAG MPI (1998-2001) uses a serpentine belt system with a different part number, not the 18-15400 V-belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-15400 an aftermarket or genuine part?\u003c\/strong\u003e The 18-15400 is manufactured by Sierra as a cross-reference replacement belt, not an original Mercury Marine or OMC branded part, though it is built to fit the same engine applications as OEM numbers 57-32850, 57-69143T, and 311606.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988088303835,"sku":"SIE-18-15400","price":23.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-15400_lg__77057.1558120513.500.750.jpg?v=1785188039"},{"product_id":"sierra-18-15450-v-belt-45-effective-length-x-29-64-top-width-replaces-omc-3853331-volvo-penta-960336-stern-drive-belt","title":"Sierra V-Belt 18-15450, Replaces OMC 914787 and Volvo Penta 960336, 45 Inch Effective Length","description":"\u003cp\u003eThe Sierra V-Belt 18-15450 is an aftermarket drive belt built to OEM quality standards for marine gas engine applications, including OMC stern drive and Volvo Penta stern drive setups. It has a 45 inch effective length and a top width of 29\/64 inch (11.5mm), matching the dimensions of the original equipment belt it replaces. The belt is constructed with a synthetic fiber fabric cover, a special polyester cord, and a polychloroprene rubber body, giving it high strength against shock loads while keeping stretch low so tension and performance stay consistent over the life of the belt. The rubber compound in the body is formulated to transfer load forces evenly and smoothly to the internal cords, reducing slip and heat buildup during operation. Oil resistance and temperature stability are standard features of this belt's construction, which helps it hold up in the engine compartment environment typical of stern drive installations. The Sierra 18-15450 is designed as a direct cross-reference replacement for OMC and Volvo Penta belts sharing the part numbers listed below, so it installs using the same pulley alignment and tensioning as the original belt without modification.\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 18-15450\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Volvo Penta V-Belts (Gas)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective Length:\u003c\/strong\u003e 45 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Width:\u003c\/strong\u003e 29\/64 inch (11.5mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.26 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Synthetic fiber fabric cover, polyester cord, polychloroprene rubber body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Devices:\u003c\/strong\u003e Outboard Motor, Stern Drive\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999566553\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOMC stern drive gas engines\u003c\/li\u003e\n\u003cli\u003eVolvo Penta stern drive gas engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOMC: 914787, 3858462, 3853331\u003c\/li\u003e\n\u003cli\u003eVolvo Penta: 960336, 3858462, 3853331\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the effective length of the Sierra 18-15450 V-belt?\u003c\/strong\u003e The effective length is 45 inches (114.3cm), with a top width of 29\/64 inch (11.5mm), on the Sierra V-Belt 18-15450.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-15450 fit OMC stern drives?\u003c\/strong\u003e Yes, the Sierra 18-15450 cross-references to OMC stern drive belts 914787, 3858462, and 3853331.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this belt work on a Volvo Penta gas stern drive?\u003c\/strong\u003e The Sierra 18-15450 also cross-references to Volvo Penta belts 960336, 3858462, and 3853331, making it suitable for Volvo Penta gas stern drive applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-15450 V-belt made from?\u003c\/strong\u003e It is built with a synthetic fiber fabric cover, a special polyester cord, and a polychloroprene rubber body, which is the construction used across the Sierra 18-15450 belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does this compare to the original OMC or Volvo Penta belt?\u003c\/strong\u003e The Sierra 18-15450 is an aftermarket belt engineered to OEM quality, form, and function, so it matches the fit and performance of the original OMC and Volvo Penta belts it cross-references.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-15450 resistant to oil and heat?\u003c\/strong\u003e Oil resistance and temperature stability are standard on this belt, helping it hold up in the engine compartment where the 18-15450 is installed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the belt stretch out over time?\u003c\/strong\u003e Low stretch properties are built into the Sierra 18-15450's cord construction to assure uniform performance over the life of the belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-15450?\u003c\/strong\u003e The order includes one Sierra V-Belt, part number 18-15450.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The Sierra 18-15450 is an aftermarket replacement belt, not an OEM-branded part, though it is designed to OEM quality standards and dimensions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of belt is the 18-15450?\u003c\/strong\u003e It is a V-belt, specifically categorized as a Volvo Penta V-belt for gas engine applications, cataloged under Sierra part number 18-15450.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-15450 weigh?\u003c\/strong\u003e The Sierra V-Belt 18-15450 weighs 0.26 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat keeps this belt from slipping under load?\u003c\/strong\u003e A special rubber compound section in the 18-15450 assures smooth and even transfer of load forces to the internal cords, reducing slip during operation.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988088598747,"sku":"SIE-18-15450","price":20.62,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-15450_lg__83929.1722371608.500.750.jpg?v=1785188833"},{"product_id":"sierra-18-15520-v-belt-52-inch-replaces-mercruiser-57-33170-57-37619t-and-omc-912714","title":"Sierra V-Belt 18-15520 Replaces Mercury Marine 57-33170 for MerCruiser 4.3L 175\/185 HP Stern Drive","description":"\u003cp\u003eThe Sierra V-Belt 18-15520 is a replacement accessory drive belt engineered for MerCruiser 4.3L 175\/185 HP stern drive engines built with the 262 cid, 6-cylinder block. It is constructed from a rubber compound reinforced with high strength synthetic cords, a design intended to resist shock loading while keeping stretch to a minimum so belt tension and pulley alignment stay consistent over the belt's service life. The special rubber compound section is formulated to transfer load forces smoothly and evenly to the internal cords, reducing the slipping and glazing that shorten the life of a lower quality belt.\u003c\/p\u003e\u003cp\u003eThis is a standard V-belt profile (not serpentine), sized with an effective length of 52 inches and a top width of 29\/64 inch (11.5 mm). It fits MerCruiser 4.3L 175\/185 HP engines from the 1985-92 model years, within engine serial number range A331455 through D714106, and cross-references to Mercury Marine and OMC stern drive part numbers. Replacing a cracked, glazed, or stretched accessory belt with this part restores proper alternator, water pump, and power steering pulley drive on the applicable engine.\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 18-15520\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Type:\u003c\/strong\u003e V-Belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective Length:\u003c\/strong\u003e 52 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Width:\u003c\/strong\u003e 29\/64 inch (11.5 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 52 inches long x 0.64 inch wide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.29 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999566690\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMerCruiser 4.3L 175\/185 HP stern drive engines, 262 cid, 6-cylinder, 1985-92, engine serial number range A331455 - D714106\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercury Marine 57-33170\u003c\/li\u003e\n\u003cli\u003eMercury Marine 57-33170Q\u003c\/li\u003e\n\u003cli\u003eMercury Marine 57-37619\u003c\/li\u003e\n\u003cli\u003eMercury Marine 57-37619Q\u003c\/li\u003e\n\u003cli\u003eMercury Marine 57-37619T\u003c\/li\u003e\n\u003cli\u003eOMC 912714\u003c\/li\u003e\n\u003cli\u003eMallory 9-55001\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-15520 V-belt fit?\u003c\/strong\u003e This belt fits MerCruiser 4.3L 175\/185 HP stern drive engines with the 262 cid, 6-cylinder block, built within engine serial number range A331455 through D714106, covering the 1985-92 model years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-15520 a V-belt or a serpentine belt?\u003c\/strong\u003e Sierra part 18-15520 is a standard V-belt profile, not a serpentine belt, with an effective length of 52 inches and a top width of 29\/64 inch (11.5 mm).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this belt replace?\u003c\/strong\u003e The Sierra 18-15520 cross-references to Mercury Marine 57-33170, 57-33170Q, 57-37619, 57-37619Q, and 57-37619T, as well as OMC 912714 and Mallory 9-55001.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-15520 V-belt made from?\u003c\/strong\u003e It is made from a rubber compound reinforced with high strength synthetic cords, a construction meant to resist shock loading and keep stretch low over the belt's service life.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-15520 V-belt weigh?\u003c\/strong\u003e This V-belt weighs 0.29 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-15520 belt?\u003c\/strong\u003e The belt measures 52 inches long with a top width of 29\/64 inch (11.5 mm); overall listed item dimensions are 52 inches long by 0.64 inch wide.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this belt fit an OMC stern drive as well as a MerCruiser?\u003c\/strong\u003e Yes, in addition to its MerCruiser 4.3L 175\/185 HP fitment, the 18-15520 cross-references to OMC stern drive part number 912714.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-15520 a genuine OEM belt or an aftermarket replacement?\u003c\/strong\u003e The 18-15520 is a Sierra-branded aftermarket replacement belt engineered to the same fit and function as the Mercury Marine and OMC part numbers it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part 18-15520?\u003c\/strong\u003e Each order includes one Sierra 18-15520 V-belt; no pulleys, tensioners, or hardware are included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my engine's serial number is within the fitment range for this belt?\u003c\/strong\u003e Check your engine's serial number plate against the range A331455 through D714106; if your MerCruiser 4.3L 175\/185 HP engine falls within that range, the 18-15520 is the correct belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would a boat owner need to replace this V-belt?\u003c\/strong\u003e Accessory drive belts like the 18-15520 stretch, crack, or glaze over time from heat and flexing, which can cause slipping at the alternator or water pump pulleys, so periodic replacement with 18-15520 keeps the drive system operating correctly.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988088631515,"sku":"SIE-18-15520","price":30.12,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-15520_lg__79434.1722347498.500.750.jpg?v=1785188065"},{"product_id":"sierra-18-15480-marine-v-belt-48-29-64-in-replaces-mercruiser-57-48122-57-48122q-mallory-9-55003","title":"Sierra 18-15480 V-Belt for MerCruiser 8.2L MIE and 8.2L MPI MIE 502 Engines, White","description":"\u003cp\u003eThe Sierra 18-15480 is a white V-belt engineered for MerCruiser 8.2L MIE and 8.2L MPI MIE stern drive engines with the 502 cid, 8-cylinder, 4-barrel configuration. This belt drives engine accessories off the crankshaft pulley and is built to meet or exceed the original equipment part it replaces, so it holds up to the heat, oil exposure, and constant flexing found in a marine engine bay.\u003c\/p\u003e\u003cp\u003eFitment is tied to specific engine serial number ranges across several production runs of the 8.2L MIE and 8.2L MPI MIE, so buyers should confirm their engine's serial number falls within the ranges listed below before ordering. The belt is also cross-referenced to common Mallory and Mercruiser part numbers, making it a straightforward swap for boaters replacing a worn OEM belt or working from an existing cross-reference number.\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 18-15480\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e V-Belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Style:\u003c\/strong\u003e V-Belt\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 Alloy Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.28 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Devices:\u003c\/strong\u003e Boat, Vehicle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999566614\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e Mallory 9-55003, Mercruiser 57-48122, 57-48122Q\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMerCruiser 8.2L MIE, 502 cid, 8 cylinder, 4 barrel, 1990-1993, serial number C878221 - D857199\u003c\/li\u003e\n\u003cli\u003eMerCruiser 8.2L MIE, 502 cid, 8 cylinder, 4 barrel, 1993-1997, serial number D857200 - K999999\u003c\/li\u003e\n\u003cli\u003eMerCruiser 8.2L MPI MIE, 502 cid, 8 cylinder, 4 barrel, 1996-1997, serial number F819620 - K147349\u003c\/li\u003e\n\u003cli\u003eMerCruiser 8.2L MPI MIE, 502 cid, 8 cylinder, 4 barrel, 1997, serial number K147350 - K999999\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMallory 9-55003\u003c\/li\u003e\n\u003cli\u003eMercruiser 57-48122\u003c\/li\u003e\n\u003cli\u003eMercruiser 57-48122Q\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-15480 V-belt fit?\u003c\/strong\u003e The Sierra 18-15480 fits MerCruiser 8.2L MIE and 8.2L MPI MIE engines with the 502 cid, 8-cylinder, 4-barrel configuration, matched to specific engine serial number ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if this belt fits my specific engine?\u003c\/strong\u003e Match your MerCruiser engine's serial number to one of the ranges covered by the 18-15480, such as C878221 - D857199 or D857200 - K999999 for the 8.2L MIE, or F819620 - K147349 and K147350 - K999999 for the 8.2L MPI MIE.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-15480 V-belt?\u003c\/strong\u003e This Sierra V-belt is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-15480 weigh?\u003c\/strong\u003e The 18-15480 V-belt weighs 0.28 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-15480 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-15480 is a Sierra aftermarket belt manufactured to meet or exceed the original equipment part it replaces on MerCruiser 8.2L engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-15480 replace?\u003c\/strong\u003e The 18-15480 cross-references to Mallory 9-55003 and Mercruiser 57-48122 and 57-48122Q.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-15480 made of?\u003c\/strong\u003e The Sierra 18-15480 V-belt is constructed of alloy steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-15480 fit the MerCruiser 502 8.2L MPI in addition to the standard 8.2L MIE?\u003c\/strong\u003e Yes, the 18-15480 covers both the 8.2L MIE and 8.2L MPI MIE variants of the 502 cid, 8-cylinder, 4-barrel MerCruiser engine, within the listed serial number ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat comes in the box with the 18-15480?\u003c\/strong\u003e Each order includes one Sierra 18-15480 V-belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-15480 belt style a V-belt or a serpentine belt?\u003c\/strong\u003e The 18-15480 is a V-belt style, not a serpentine belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-15480 as a direct swap for a worn Mercruiser 57-48122 belt?\u003c\/strong\u003e Yes, the 18-15480 is cross-referenced to the Mercruiser 57-48122 and 57-48122Q, so it can be used as a direct replacement for those part numbers.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988088664283,"sku":"SIE-18-15480","price":23.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-15480__41094.1737858828.500.750.jpg?v=1785189001"},{"product_id":"sierra-18-15460-v-belt-46-in-x-29-64-in-replaces-mercruiser-57-48120a1-volvo-penta-950818-omc-310953","title":"Sierra 18-15460 V-Belt for Mercruiser 5.7L 350 MAG MPI\/SKI 1995-1996, Replaces 57-48120A1","description":"\u003cp\u003eThe Sierra 18-15460 is a V-belt engineered for Mercruiser 5.7L 350 MAG MPI and 350 MAG SKI stern drive engines built in 1995-1996, covering serial numbers F350583 through F799999. This belt drives the water pump and other engine-driven accessories, and it is built to meet or exceed the specifications of the original equipment belt it replaces. The 18-15460 supersedes the earlier Sierra part number 18-15290 and cross-references directly to Mercruiser 57-48120, 57-48120A1, and 57-48120Q1, giving boat owners a reliable direct-fit replacement without hunting for a discontinued OEM number. It also cross-references to OMC 310953 and 909971, Evinrude\/Johnson 909971, Mallory 9-55002, and Volvo Penta 950818 and 829207, making it a useful reference point for cross-brand interchange on comparable belt-driven marine engines. The belt has an effective length of 46 inches and weighs 0.26 pounds. Correct belt selection depends on matching your engine's exact model and serial number range, since Mercruiser and MerCruiser-family engines used several different belt part numbers across model years; the 18-15460 is specific to the 1995-1996 350 MAG MPI\/SKI serial range noted above. Always confirm your engine's serial number before ordering to ensure proper 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 18-15460\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Style:\u003c\/strong\u003e V-Belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective Length:\u003c\/strong\u003e 46 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e 5.7L 350 MAG MPI \/ 350 MAG SKI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment Years:\u003c\/strong\u003e 1995-1996\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 350 cid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinders:\u003c\/strong\u003e 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerial Number Range:\u003c\/strong\u003e F350583 - F799999\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.26 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999566577\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupersedes Sierra Part Number:\u003c\/strong\u003e 18-15290\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable With:\u003c\/strong\u003e Mercruiser 57-48120, 57-48120A1, 57-48120Q1; OMC 310953, 909971; Evinrude\/Johnson 909971; Mallory 9-55002; Volvo Penta 950818, 829207\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 5.7L 350 MAG MPI, 1995-1996, serial numbers F350583 - F799999\u003c\/li\u003e\n\u003cli\u003eMercruiser 5.7L 350 MAG SKI, 1995-1996, serial numbers F350583 - F799999\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eSierra 18-15290\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-15460 V-belt fit?\u003c\/strong\u003e The Sierra 18-15460 fits Mercruiser 5.7L 350 MAG MPI and 350 MAG SKI engines built in 1995-1996, covering serial numbers F350583 through F799999.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-15460 the same as Mercruiser 57-48120A1?\u003c\/strong\u003e Yes, the 18-15460 cross-references directly to Mercruiser 57-48120, 57-48120A1, and 57-48120Q1, so it is a suitable replacement for those part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is this V-belt?\u003c\/strong\u003e The Sierra 18-15460 has an effective length of 46 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-15460 replace an older Sierra part number?\u003c\/strong\u003e Yes, the 18-15460 supersedes the earlier Sierra part number 18-15290.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat other OEM numbers does the Sierra 18-15460 cross-reference?\u003c\/strong\u003e Beyond Mercruiser, the 18-15460 cross-references to OMC 310953 and 909971, Evinrude\/Johnson 909971, Mallory 9-55002, and Volvo Penta 950818 and 829207.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-15460 V-belt weigh?\u003c\/strong\u003e The 18-15460 weighs 0.26 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-15460 a genuine OEM belt or an aftermarket part?\u003c\/strong\u003e The 18-15460 is a Sierra aftermarket belt built to meet or exceed the specifications of the original equipment belt it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the Sierra 18-15460?\u003c\/strong\u003e One Sierra 18-15460 V-belt is included per unit ordered.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the Sierra 18-15460 fit a 350 MIE engine?\u003c\/strong\u003e No, the 18-15460 is specific to the 5.7L 350 MAG MPI and 350 MAG SKI engines built in 1995-1996; 350 MIE engines use different Sierra belt part numbers for their respective serial ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I confirm the 18-15460 is correct for my boat before ordering?\u003c\/strong\u003e Check your Mercruiser 5.7L 350 MAG MPI or 350 MAG SKI engine's serial number against the F350583 - F799999 range covered by the Sierra 18-15460 to confirm fitment before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the Sierra 18-15460 replace a Volvo Penta or OMC belt?\u003c\/strong\u003e Yes, the 18-15460 cross-references to Volvo Penta 950818 and 829207 and OMC 310953 and 909971, making it usable as a replacement for those numbers on compatible engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988088697051,"sku":"SIE-18-15460","price":28.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-15460_lg__71653.1558121075.500.750.jpg?v=1785188494"},{"product_id":"sierra-18-15490-v-belt-52-1-2-in-effective-length-replaces-mercury-mercruiser-57-816295t-57-816295q","title":"Sierra V-Belt 18-15490, Replaces Mercury Marine 57-816295T, for Mercruiser 4.3L Gen II and 4.3LX Engines","description":"\u003cp\u003eThe Sierra 18-15490 V-Belt is a white rubber drive belt engineered for Mercruiser 4.3L engine applications, including the 4.3L Gen II (2bbl) and 4.3LX (4bbl) engine builds. It is built with a cogged profile molded to precise engineering tolerances, which improves belt flexibility while keeping the cord structure well supported through each rotation. Inside the belt, high-strength synthetic cords resist shock loading and hold a low-stretch profile, so the belt maintains uniform performance over its service life instead of loosening prematurely. The open cog design also increases the surface area exposed to air circulation, helping keep the belt running cooler and reducing heat buildup during extended operation. Rubber edges are formulated to maintain positive, no-slip contact inside the pulley grooves, which keeps energy transfer consistent and reduces the chance of belt slip under load. A special rubber compound section works together with the internal cords to ensure load forces are transferred smoothly and evenly rather than in sudden jolts. Measuring an effective length of 52 1\/2 inches with a top width of 29\/64 inch, this V-belt is designed as a direct fit for Mercruiser 4.3L Gen II and 4.3LX engines within the serial number ranges noted below.\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 18-15490\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e V-Belt\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 Rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEffective Length:\u003c\/strong\u003e 52 1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop Width:\u003c\/strong\u003e 29\/64 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e Mercury Marine 57-816295T\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 4.3L Gen II (2bbl), 262 cid, V6, serial number range OD714107-OF802999\u003c\/li\u003e\n\u003cli\u003eMercruiser 4.3LX (4bbl), 262 cid, V6, serial number range OB775130-OD714369\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury Marine 57-816295T\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-15490 V-belt fit?\u003c\/strong\u003e The Sierra 18-15490 V-belt fits Mercruiser 4.3L Gen II (2bbl) engines within serial number range OD714107-OF802999 and Mercruiser 4.3LX (4bbl) engines within serial number range OB775130-OD714369.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-15490 belt the same as Mercury Marine 57-816295T?\u003c\/strong\u003e Yes, Sierra part 18-15490 is a direct cross-reference to Mercury Marine part 57-816295T for the same Mercruiser 4.3L engine applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of this V-belt?\u003c\/strong\u003e The 18-15490 V-belt has an effective length of 52 1\/2 inches and a top width of 29\/64 inch.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-15490 V-belt weigh?\u003c\/strong\u003e This V-belt weighs 0.25 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-15490 V-belt made from?\u003c\/strong\u003e It is made from rubber, with high-strength synthetic cords inside the belt body to resist shock loading and stretch.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-15490 belt?\u003c\/strong\u003e The 18-15490 V-belt is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does this belt have a cogged design?\u003c\/strong\u003e The cogs on the Sierra 18-15490 are molded to precise engineering tolerances to improve flexibility and maintain cord support, and the open cog profile increases air circulation to help keep the belt cool and reduce heat buildup.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this belt slip on the pulley over time?\u003c\/strong\u003e The rubber edges of the 18-15490 are designed to maintain positive, no-slip contact with the pulley grooves for reliable, consistent energy transfer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-15490 a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e 18-15490 is the Sierra manufacturer part number itself, not an aftermarket copy of another brand's belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-15490 belt work with the 4.3LX 4bbl engine specifically?\u003c\/strong\u003e Yes, one of its two listed applications is the Mercruiser 4.3LX (4bbl) engine, within serial number range OB775130-OD714369.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order this part?\u003c\/strong\u003e Ordering Sierra 18-15490 includes one V-belt sized for the Mercruiser 4.3L Gen II and 4.3LX engine applications listed for this part number.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988088729819,"sku":"SIE-18-15490","price":45.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-15490_lg__76250.1722495373.500.750.jpg?v=1785188407"},{"product_id":"sierra-18-15550-v-belt-for-mercruiser-replaces-57-13458t-55-in-x-29-64-in","title":"Sierra V-Belt 18-15550, 55 Inch, Fits 7.4L 454 MAG ALPHA 1986-1988 and 454 MAG 1988-92 Engines","description":"\u003cp\u003eThe Sierra 18-15550 is a 55 inch V-belt built for marine engine service, designed to deliver OEM-quality fit, form, and function on applicable 7.4L 454 MAG engines. It is constructed with a synthetic fiber fabric cover, a special polyester cord, and a polychloroprene rubber body, giving the belt oil resistance and temperature stability for use in the demanding environment of a boat engine compartment. The polyester cord provides tensile strength to resist stretching under load, while the polychloroprene rubber compound resists cracking and glazing from heat cycling and exposure to engine fluids.\u003c\/p\u003e\u003cp\u003eThis belt is engineered as a drop-in replacement sized specifically for the 55 inch belt position on covered MerCruiser 454 MAG applications, so installers do not need to guess at length or cross-section. It fits the 7.4L 454 MAG ALPHA engine (454 cid, 8 cylinder, serial number range A631894 - B785148) and the 7.4L 454 MAG engine (454 cid, 8 cylinder, serial number range B721206 - D805068). Each belt ships as a single unit and is finished in white.\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 18-15550\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e V-Belt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBelt Length:\u003c\/strong\u003e 55 inches (1397 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 454 cid (7.4L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Cylinders:\u003c\/strong\u003e 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplicable Serial Number Range:\u003c\/strong\u003e A631894 - B785148 (454 MAG ALPHA); B721206 - D805068 (454 MAG)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.31 pounds\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 Synthetic fiber fabric cover, polyester cord, polychloroprene rubber body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Items:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999566744\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e7.4L 454 MAG ALPHA, 1986-1988, 454 cid, 8 cylinder, serial number range A631894 - B785148\u003c\/li\u003e\n\u003cli\u003e7.4L 454 MAG, 1988-92, 454 cid, 8 cylinder, serial number range B721206 - D805068\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-15550 V-belt fit?\u003c\/strong\u003e The Sierra 18-15550 fits the 7.4L 454 MAG ALPHA engine (1986-1988, 454 cid, 8 cylinder, serial number range A631894 - B785148) and the 7.4L 454 MAG engine (1988-92, 454 cid, 8 cylinder, serial number range B721206 - D805068).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long is the 18-15550 belt?\u003c\/strong\u003e This belt measures 55 inches (1397 mm) in length, sized for the 55 inch belt position on its covered MerCruiser 454 MAG applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-15550 belt made of?\u003c\/strong\u003e It is built with a synthetic fiber fabric cover over a special polyester cord and a polychloroprene rubber body, giving the belt oil resistance and temperature stability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-15550 an OEM-quality belt?\u003c\/strong\u003e Yes, the 18-15550 is manufactured to be correct in fit, form, and function for its listed 454 MAG applications, matching OEM belt performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my engine's serial number matches this belt?\u003c\/strong\u003e Check your engine's serial number against the ranges A631894 - B785148 for the 7.4L 454 MAG ALPHA or B721206 - D805068 for the 7.4L 454 MAG; the 18-15550 is built for engines within these ranges.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-15550 V-belt?\u003c\/strong\u003e The belt is white in color.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many belts come in a package?\u003c\/strong\u003e Each package of the Sierra 18-15550 contains a single V-belt.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-15550 V-belt weigh?\u003c\/strong\u003e It weighs 0.31 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-15550 resist heat and oil exposure?\u003c\/strong\u003e Yes, the polychloroprene rubber body and polyester cord construction give this belt oil resistance and temperature stability suited to a marine engine compartment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-15550 fit any 454 MAG engine, or just certain serial numbers?\u003c\/strong\u003e It is built for 7.4L 454 MAG and 454 MAG ALPHA engines within the specific serial number ranges A631894 - B785148 and B721206 - D805068; engines outside those ranges may require a different belt length.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-15550 belt?\u003c\/strong\u003e The UPC for the Sierra 18-15550 V-belt is 030999566744.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988088893659,"sku":"SIE-18-15550","price":30.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-15550__42192.1737842686.500.750.jpg?v=1785188066"},{"product_id":"sierra-18-1977-1-thermostat-housing-for-mercruiser-i-o-replaces-oem-47441-47441a1-fits-gm-260-225-228-898-198-cooling-systems","title":"Sierra 18-1977-1 Thermostat Housing for Mercruiser 305 cid V-8 (1977-1982), Replaces 4765100, 6218461","description":"\u003cp\u003eThe Sierra 18-1977-1 is a marine thermostat housing built to replace the factory housing on Mercruiser 305 cid V-8 sterndrive engines produced in 1977-1982. It is sand cast and machined to exact specifications, then primed and painted to withstand the harsh marine environment, and is finished in white with a polished surface. The housing mounts to the engine block and holds the thermostat in place while sealing the cooling passages, so a worn, cracked, or corroded original housing is a common reason for coolant leaks, overheating, or an improperly seating thermostat. Installing the 18-1977-1 restores a proper seal at this connection point and returns the cooling system to factory-correct operation.\u003c\/p\u003e\u003cp\u003eThis housing is a direct cross-reference for GM\/Mercruiser OEM housing numbers 4765100 and 6218461, so it fits in place of those original parts on the applicable 305 cid V-8 engines without modification. It ships as a single housing unit and is intended as a like-for-like replacement, not an upgrade kit, so existing thermostats, gaskets, and hardware from the original installation can be reused if they are still in serviceable condition.\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 18-1977-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e Mercruiser 305 cid V-8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Years:\u003c\/strong\u003e 1977-1982\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 4765100, 6218461\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.51 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 17.6 H x 8.7 L x 12.3 W (centimetres)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal, sand cast and machined\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Polished\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e China\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282198206\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser 305 cid V-8 engines, 1977-1982\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e4765100\u003c\/li\u003e\n\u003cli\u003e6218461\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1977-1 thermostat housing fit?\u003c\/strong\u003e The Sierra 18-1977-1 fits Mercruiser 305 cid V-8 engines built in 1977-1982.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1977-1 replace OEM part number 4765100?\u003c\/strong\u003e Yes, the Sierra 18-1977-1 is a direct cross-reference for OEM housing number 4765100 on the applicable 305 cid V-8 Mercruiser engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1977-1 also replace OEM part number 6218461?\u003c\/strong\u003e Yes, 6218461 is the other OEM number the Sierra 18-1977-1 housing replaces on 1977-1982 305 cid V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the 18-1977-1 housing made of?\u003c\/strong\u003e It is a metal housing that is sand cast and machined to exact specifications, then primed and painted, with a polished white finish for long life in a marine environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-1977-1 thermostat housing weigh?\u003c\/strong\u003e It weighs 1.51 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-1977-1?\u003c\/strong\u003e The packaged housing measures 17.6 H x 8.7 L x 12.3 W in centimetres.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1977-1 include the thermostat and gasket?\u003c\/strong\u003e The 18-1977-1 is the thermostat housing itself; it ships as a single housing unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1977-1 a genuine Sierra part or aftermarket generic?\u003c\/strong\u003e The 18-1977-1 is manufactured by Sierra, a marine parts brand, and is sold under Sierra's own part number as its housing for this application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace my thermostat housing?\u003c\/strong\u003e A cracked, corroded, or leaking original housing on a 305 cid V-8 Mercruiser engine is a common cause of coolant leaks and overheating, and the Sierra 18-1977-1 is built to restore a proper seal in place of the worn factory unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-1977-1 manufactured?\u003c\/strong\u003e The country of origin for the 18-1977-1 housing is China.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color and finish does the 18-1977-1 come in?\u003c\/strong\u003e The 18-1977-1 housing has a white color with a polished finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I reuse my old thermostat and hardware with the 18-1977-1?\u003c\/strong\u003e Since the 18-1977-1 is a like-for-like replacement housing, an existing thermostat, gasket, and hardware can be reused as long as they are still in serviceable condition.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988089581787,"sku":"SIE-18-1977-1","price":65.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1977-1__20869.1722361156.500.750.jpg?v=1785188626"},{"product_id":"sierra-18-1989-thermostat-housing-stainless-steel-replaces-mercruiser-8m0061381-fits-mercruiser-gm-v-8-454-502-cid-7-4l-8-2l","title":"Sierra Thermostat Housing 18-1989, Replaces Mercruiser 8M0061381 861006A1, Fits GM V-8 454\/502 MCM\/MIE","description":"\u003cp\u003eThe Sierra 18-1989 Thermostat Housing is a stainless steel replacement housing built for MCM\/MIE GM V-8 (454 \u0026amp; 502 cid) marine engines. Stainless steel construction resists corrosion in salt and fresh water environments while providing long service life under sustained engine heat and vibration. This housing is manufactured to meet or exceed OEM specifications, giving boat owners a direct, reliable replacement for a worn, cracked, or leaking factory thermostat housing.\u003c\/p\u003e\u003cp\u003eA properly sealed thermostat housing is essential for maintaining correct engine operating temperature, which affects performance improvement and throttle response. The 18-1989 is designed as a direct fit for the applications listed below, and Sierra offers the 18-1989K Thermostat Service Kit as the matching source for the gasket, thermostat, and other service parts needed when installing this housing.\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 18-1989\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 3.9 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e MCM\/MIE GM V-8 (454 \u0026amp; 502 cid) engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService Kit:\u003c\/strong\u003e 18-1989K Thermostat Service Kit (for replacement parts)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMCM\/MIE GM V-8 (454 \u0026amp; 502 cid) engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMercruiser 8M0061381\u003c\/li\u003e\n\u003cli\u003eMercruiser 861006A1\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-1989 Thermostat Housing fit?\u003c\/strong\u003e The Sierra 18-1989 Thermostat Housing fits MCM\/MIE GM V-8 (454 \u0026amp; 502 cid) marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-1989 replace?\u003c\/strong\u003e This housing replaces Mercruiser 8M0061381 and Mercruiser 861006A1, so either OEM number can be used to confirm a correct match to the Sierra 18-1989.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-1989 Thermostat Housing made of?\u003c\/strong\u003e It is made of stainless steel, chosen for corrosion resistance in marine engine cooling systems exposed to salt and fresh water.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1989 Thermostat Housing weigh?\u003c\/strong\u003e The Sierra 18-1989 Thermostat Housing weighs 3.9 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1989 come with a thermostat and gasket?\u003c\/strong\u003e No, the 18-1989 is the housing itself; the matching 18-1989K Thermostat Service Kit provides the replacement parts such as the thermostat and gasket needed for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-1989 a genuine OEM part or aftermarket?\u003c\/strong\u003e The 18-1989 is a Sierra-manufactured aftermarket housing engineered to meet or exceed OEM specifications for Mercruiser 8M0061381 and 861006A1 applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does a marine engine thermostat housing need to be stainless steel?\u003c\/strong\u003e Stainless steel construction on the Sierra 18-1989 resists the corrosion that raw water cooling systems cause in marine engines, extending service life compared to housings made from less resistant materials.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat should I order along with the 18-1989 housing for a full replacement?\u003c\/strong\u003e Sierra recommends the 18-1989K Thermostat Service Kit alongside the 18-1989 housing for the replacement parts needed to complete the installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-1989 improve engine performance?\u003c\/strong\u003e A correctly sealed and functioning thermostat housing like the Sierra 18-1989 supports proper engine operating temperature, which contributes to performance improvement and throttle response.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1989 housing specific to one engine cid, or does it cover multiple sizes?\u003c\/strong\u003e The Sierra 18-1989 is designed for MCM\/MIE GM V-8 engines in both 454 and 502 cid configurations.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988090040539,"sku":"SIE-18-1989","price":251.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/xa__61079.1753840676.500.750.jpg?v=1785188531"},{"product_id":"sierra-18-1989k-thermostat-service-kit-for-18-1989-marine-thermostat-housing-mercruiser-8m0061381-861006a1","title":"Sierra 18-1989K Thermostat Service Kit for 18-1989 Thermostat Housing","description":"\u003cp\u003eThe Sierra 18-1989K Thermostat Service Kit provides the replacement parts needed to service the 18-1989 thermostat housing on your marine engine. Rather than replacing the entire housing, this kit lets you restore proper cooling system function with fresh service components sized specifically for that housing, helping maintain correct engine operating temperature and preventing the overheating issues that come from a worn or failing thermostat setup. It is built to a universal fit, making it a straightforward option for boat owners performing routine cooling system maintenance. Sierra engineers its parts to meet or exceed the performance of the original equipment they replace, and the company supplies OEM engine manufacturers and boat builders with parts on a daily basis, so this kit is manufactured to the same standard used across the marine industry. At 0.1 pounds, it is a compact, lightweight kit that is easy to store aboard or in a parts locker until it's needed. Whether you are performing scheduled maintenance or addressing a cooling system problem, the 18-1989K gives you the correct service components matched to the 18-1989 housing without having to source individual parts 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 18-1989K\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Service Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Housing:\u003c\/strong\u003e 18-1989 Thermostat Housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFit Type:\u003c\/strong\u003e Universal Fit\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 0.1 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 808282271145\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eFits the Sierra 18-1989 Thermostat Housing\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-1989K Thermostat Service Kit for?\u003c\/strong\u003e It is a service kit for the 18-1989 thermostat housing, providing the replacement parts needed to service that housing rather than replacing the whole unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-1989K fit any boat engine?\u003c\/strong\u003e The 18-1989K is listed as a universal fit kit, sized to match the 18-1989 thermostat housing rather than one specific engine model.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-1989K weigh?\u003c\/strong\u003e This Sierra thermostat service kit weighs 0.1 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-1989K kit?\u003c\/strong\u003e The kit is white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many units come in one 18-1989K package?\u003c\/strong\u003e One Sierra 18-1989K Thermostat Service Kit is included per unit count of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-1989K a genuine Sierra part or aftermarket?\u003c\/strong\u003e It is a genuine Sierra part, manufactured to meet or exceed the performance of the original equipment it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-1989K come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-1989K Thermostat Service Kit is covered by a limited warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-1989K?\u003c\/strong\u003e The UPC for the Sierra 18-1989K Thermostat Service Kit is 808282271145.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to replace the entire thermostat housing to use this kit?\u003c\/strong\u003e No, the 18-1989K is specifically a service kit designed to refresh the 18-1989 thermostat housing without replacing the full housing assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWho makes the 18-1989K thermostat service kit?\u003c\/strong\u003e Sierra manufactures the 18-1989K, and the company supplies parts to OEM engine manufacturers and boat builders as part of its regular production.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988090138843,"sku":"SIE-18-1989K","price":16.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-1989K__90158.1739459150.500.750.jpg?v=1785188003"},{"product_id":"sierra-18-2553-9-thermostat-cover-gasket-replaces-mercruiser-27-47510-for-mercruiser-gm-v-6-v-8-pack-of-2","title":"Sierra 18-2553-9 Thermostat Cover Gasket - Pack of 2, Replaces Mercruiser 27-47510, Fits MCM\/MIE GM V-6 \u0026 V-8 Engines","description":"\u003cp\u003eThe Sierra 18-2553-9 Thermostat Cover Gasket seals the thermostat housing on MCM\/MIE GM V-6 and V-8 marine engines equipped with the older style two-piece thermostat housing. Sold as a pack of 2, this gasket ensures the housing forms a tight seal against the exhaust manifold or thermostat cover, preventing coolant leaks and maintaining proper engine operating temperature. It is built to Sierra's quality standard, which is designed to meet or exceed the original equipment part it replaces, giving boat owners a reliable, OEM-equivalent seal for routine thermostat service or replacement. This gasket is commonly needed whenever the thermostat cover is removed for cleaning, inspection, or thermostat replacement, since reusing an old gasket can lead to leaks. It directly interchanges with several OEM and aftermarket part numbers, making it easy to source a correct-fit replacement regardless of which brand's part number is printed on your old housing. Keeping a spare pack on hand is useful for owners who service their own MerCruiser sterndrive engines, since the gasket is inexpensive relative to the cost of a coolant leak or an engine that runs hot due to a failed 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 18-2553-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Cover Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2\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 808282162870\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 00808282162870\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e MCM\/MIE GM V-6 \u0026amp; V-8 engines with older style 2-piece thermostat housing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e898 305 cid V-8, 1983-1984\u003c\/li\u003e\n\u003cli\u003eMCM\/MIE GM V-6 \u0026amp; V-8 engines with older style 2-piece thermostat housing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 31460\u003c\/li\u003e\n\u003cli\u003eMallory 9-60005\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-47510\u003c\/li\u003e\n\u003cli\u003eMercruiser 27-47510Q\u003c\/li\u003e\n\u003cli\u003eOsco 47510\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-2553-9 thermostat cover gasket fit?\u003c\/strong\u003e The 18-2553-9 fits MCM\/MIE GM V-6 and V-8 marine engines that use the older style two-piece thermostat housing, including the 898 305 cid V-8 application built for 1983-1984.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a pack?\u003c\/strong\u003e Each Sierra 18-2553-9 package includes 2 thermostat cover gaskets, so you get a spare or enough for a two-sided housing in one purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2553-9 gasket compatible with Mercruiser 27-47510?\u003c\/strong\u003e Yes, the Sierra 18-2553-9 thermostat cover gasket is interchangeable with Mercruiser 27-47510 and 27-47510Q, so it installs as a direct replacement for either of those OEM part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat other part numbers does this gasket cross-reference with?\u003c\/strong\u003e Besides the Mercruiser 27-47510 and 27-47510Q numbers, the 18-2553-9 also interchanges with GLM 31460, Mallory 9-60005, and Osco 47510.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this an OEM or aftermarket gasket?\u003c\/strong\u003e The 18-2553-9 is a Sierra aftermarket gasket manufactured to meet or exceed the specifications of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2553-9 gasket weigh?\u003c\/strong\u003e The Sierra 18-2553-9 thermostat cover gasket pack weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace my thermostat cover gasket?\u003c\/strong\u003e A thermostat cover gasket like the 18-2553-9 should be replaced any time the thermostat housing is removed for service, since reusing the old gasket can allow coolant to leak from the seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2553-9 work with the newer style thermostat housing?\u003c\/strong\u003e No, the 18-2553-9 is designed for the older style two-piece thermostat housing on MCM\/MIE GM V-6 and V-8 engines, not the newer housing designs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2553-9 gasket?\u003c\/strong\u003e The Sierra 18-2553-9 thermostat cover gasket has UPC 808282162870.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-2553-9 gasket on a GM V-6 engine, not just V-8?\u003c\/strong\u003e Yes, the Sierra 18-2553-9 is listed to fit both GM V-6 and V-8 MCM\/MIE engines with the older two-piece thermostat housing.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988106981595,"sku":"SIE-18-2553-9","price":4.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2553-9__38426.1737864401.500.750.jpg?v=1785188130"},{"product_id":"sierra-18-2546-9-thermostat-cover-gasket-replaces-johnson-evinrude-321184-fits-v-6-outboards-pack-of-2","title":"Sierra 18-2546-9 Thermostat Gasket for Johnson\/Evinrude V6 Outboard Engines, OEM 321184, Pack of 2","description":"\u003cp\u003eThe Sierra 18-2546-9 Thermostat Gasket seals the thermostat cover on Johnson\/Evinrude V6 outboard engines, preventing coolant leaks at the cover-to-housing joint so the cooling system maintains proper pressure and circulation. Each package contains two gaskets, giving you a spare on hand for the next service interval or a second engine. The gasket is molded from plastic and is designed as a direct fit for the thermostat cover assembly on applicable V6 outboards, correlating to OEM part number 321184.\u003c\/p\u003e\u003cp\u003eThis gasket is a wear item that should be replaced any time the thermostat cover is removed, whether during a thermostat replacement, cooling system inspection, or general engine service, since reusing a compressed or hardened gasket can allow coolant to seep past the cover and lead to overheating or reduced coolant flow. Installation is straightforward: remove the thermostat cover, clean the mating surfaces of old gasket material, position the new 18-2546-9 gasket, and reinstall the cover per the engine's service procedure. Sierra manufactures this part to meet or exceed the specifications of the original equipment part it replaces, making it a reliable choice for engine owners and marine service shops maintaining Johnson\/Evinrude V6 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 18-2546-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Cover 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\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e No Color\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e Johnson\/Evinrude V6 outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 321184\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282162818\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.03 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude V6 outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e321184\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2546-9 gasket fit?\u003c\/strong\u003e The Sierra 18-2546-9 is designed for the thermostat cover on Johnson\/Evinrude V6 outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a pack?\u003c\/strong\u003e Each package of the Sierra 18-2546-9 contains two thermostat cover gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2546-9 gasket the same as OEM part 321184?\u003c\/strong\u003e Yes, the Sierra 18-2546-9 corresponds to OEM part number 321184 and is built to meet or exceed the original equipment specification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the thermostat gasket made from?\u003c\/strong\u003e The 18-2546-9 gasket is made of plastic, matching the material used for the original thermostat cover gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace this gasket?\u003c\/strong\u003e Replace the 18-2546-9 gasket any time the thermostat cover is removed, such as during a thermostat swap or cooling system service, since a reused gasket can leak coolant.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the gasket weigh?\u003c\/strong\u003e The Sierra 18-2546-9 thermostat gasket pack weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or an aftermarket copy?\u003c\/strong\u003e The 18-2546-9 is a genuine Sierra part manufactured to meet or exceed the specification of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need any other parts to complete a thermostat cover reseal?\u003c\/strong\u003e The 18-2546-9 package supplies the two thermostat cover gaskets; the thermostat itself and other cover hardware are separate parts not included in this package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the gasket?\u003c\/strong\u003e The Sierra 18-2546-9 gasket has no distinct color, consistent with its plastic construction.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation of the 18-2546-9 gasket difficult?\u003c\/strong\u003e No special tools are needed; installation involves removing the thermostat cover, cleaning the mating surfaces, and fitting the new 18-2546-9 gasket before reinstalling the cover.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107047131,"sku":"SIE-18-2546-9","price":2.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2546-9__83944.1722367523.500.750.jpg?v=1785188339"},{"product_id":"sierra-18-2554-9-thermostat-cover-gasket-2-pack-replaces-mercruiser-27-41812-fits-mercruiser-gm-v-6-v-8","title":"Sierra Thermostat Cover Gasket 18-2554-9, Replaces 27-41812, Fits MCM\/MIE GM V-6 \u0026 V-8 Engines - Pack of 2","description":"\u003cp\u003eThe Sierra 18-2554-9 Thermostat Cover Gasket seals the thermostat housing on MCM\/MIE GM V-6 \u0026amp; V-8 marine engines, preventing coolant leaks at this common failure point. Each package contains two gaskets, giving boat owners a spare for the next service interval or enough material to service two engines in one job. This gasket is a direct fit replacement for the OEM thermostat cover gasket used on these engine families, restoring a proper seal without modification.\u003c\/p\u003e\u003cp\u003eInstalling a fresh thermostat cover gasket during any thermostat replacement, cooling system inspection, or routine maintenance helps prevent coolant seepage that can lead to overheating or corrosion around the housing. Because the part is sold in a pack of two, it supports both immediate repair needs and future maintenance planning.\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 18-2554-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Thermostat Cover 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\u003eEngine Fitment:\u003c\/strong\u003e MCM\/MIE GM V-6 \u0026amp; V-8 engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.08 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-41812, 27-90556, 27-41812Q\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282162887\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMCM\/MIE GM V-6 \u0026amp; V-8 engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-41812\u003c\/li\u003e\n\u003cli\u003e27-90556\u003c\/li\u003e\n\u003cli\u003e27-41812Q\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-2554-9 thermostat cover gasket fit?\u003c\/strong\u003e The Sierra 18-2554-9 is designed for MCM\/MIE GM V-6 \u0026amp; V-8 marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a pack?\u003c\/strong\u003e Each 18-2554-9 package includes 2 thermostat cover gaskets, enough for a repair with a spare or for servicing two engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich OEM part numbers does this gasket replace?\u003c\/strong\u003e It replaces OEM numbers 27-41812, 27-90556, and 27-41812Q on MCM\/MIE GM V-6 \u0026amp; V-8 engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2554-9 a genuine OEM part or an aftermarket equivalent?\u003c\/strong\u003e It is an aftermarket gasket manufactured by Sierra to match the fit and function of the OEM thermostat cover gasket it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the gasket weigh?\u003c\/strong\u003e The 18-2554-9 thermostat cover gasket weighs 0.08 pounds per pack.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the thermostat cover gasket?\u003c\/strong\u003e Replace the 18-2554-9 gasket any time the thermostat cover is removed, such as during thermostat replacement or if coolant seepage is noticed at the housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket fit both port and starboard engines?\u003c\/strong\u003e The 18-2554-9 is not side-specific; it fits MCM\/MIE GM V-6 \u0026amp; V-8 engines generally, based on engine family rather than mounting side.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the difference between 18-2554-9 and 18-2555-9?\u003c\/strong\u003e 18-2554-9 is the thermostat gasket for GM V-6 \u0026amp; V-8 engines, while 18-2555-9 is a separate Sierra part number for 4-cylinder engine applications; make sure to order the number matching your engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use one gasket from the pack and save the other?\u003c\/strong\u003e Yes, the 18-2554-9 is sold as a pack of 2, so one gasket can be installed now and the second kept as a spare for a future service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the 18-2554-9 purchase?\u003c\/strong\u003e The package contains 2 Sierra thermostat cover gaskets; no thermostat or additional hardware is included.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107079899,"sku":"SIE-18-2554-9","price":12.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2554-9__36089.1732158012.500.750.jpg?v=1785188831"},{"product_id":"impeller-gasket-for-mercury-mariner-75-90-100-115-hp-replaces-oem-27-817277-2-pack-sierra-18-2566","title":"Sierra Impeller Gasket 18-2566-9, Replaces 27-430472, for Mercruiser Alpha I Generation 2, Pack of 2","description":"\u003cp\u003eThe Sierra 18-2566-9 is an impeller gasket for the Mercruiser Alpha I - Generation 2 stern drive water pump, sold as a package of 2 gaskets. This gasket seats between the water pump housing and the impeller cavity to maintain a proper seal as raw water is drawn through the pump, preventing leaks and air intrusion that can reduce cooling flow. Because the gasket is a wear item that compresses and can tear during service, it is routinely replaced any time the water pump is opened up, such as during an impeller replacement or a full water pump rebuild. Installing a fresh gasket rather than reusing the old one helps ensure the pump housing seats correctly and seals under pressure, which protects engine cooling performance. This part is packaged two to a unit, so a single purchase supplies enough gaskets for one full water pump service with a spare on hand, or for two separate service jobs. It is designed as a direct fit for the Mercruiser Alpha I - Generation 2 application and cross-references to OEM part number 27-430472 for buyers matching against an original Mercruiser part number.\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 18-2566-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 gaskets per package\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 808282163006\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercruiser Cooling System\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Type:\u003c\/strong\u003e Impeller gasket \/ water pump gasket\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser Alpha I - Generation 2 stern drive water pump\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e27-430472\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2566-9 impeller gasket fit?\u003c\/strong\u003e It fits the Mercruiser Alpha I - Generation 2 stern drive water pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of 18-2566-9?\u003c\/strong\u003e The 18-2566-9 is sold as a package of 2 gaskets, enough for one full water pump service with a spare or two separate jobs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-2566-9 equivalent to Mercruiser part 27-430472?\u003c\/strong\u003e Yes, Sierra 18-2566-9 cross-references directly to Mercruiser OEM part number 27-430472.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should this impeller gasket be replaced?\u003c\/strong\u003e The gasket should be replaced any time the Alpha I - Generation 2 water pump is opened, such as during an impeller swap or a full water pump rebuild, since it compresses and can tear during service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2566-9 gasket package weigh?\u003c\/strong\u003e The Sierra 18-2566-9 impeller gasket package weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the old gasket be reused instead of installing 18-2566-9?\u003c\/strong\u003e Reusing a worn gasket is not recommended, because a compressed or torn gasket will not seal the water pump housing properly; installing a fresh 18-2566-9 gasket ensures a proper seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2566-9 gasket?\u003c\/strong\u003e The UPC for the Sierra 18-2566-9 impeller gasket package is 808282163006.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-2566-9 fit other Mercruiser Alpha drive generations?\u003c\/strong\u003e This gasket is specified for the Alpha I - Generation 2 water pump; other Alpha drive generations use different gasket part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2566-9 gasket genuine Sierra or aftermarket equivalent?\u003c\/strong\u003e The 18-2566-9 is a Sierra-branded part manufactured to fit the Mercruiser Alpha I - Generation 2 water pump as a cross-reference to OEM number 27-430472.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat category of part is 18-2566-9?\u003c\/strong\u003e 18-2566-9 is an impeller gasket within the Mercruiser cooling system parts group, used to seal the water pump during impeller service.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107178203,"sku":"SIE-18-2566-9","price":6.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2566-9__61182.1737842640.500.750.jpg?v=1785329167"},{"product_id":"sierra-18-2587-power-steering-cooler-for-mercruiser-replaces-oem-99356a2-6-tube-bundle","title":"Sierra 18-2587 Transmission Oil Cooler, Replaces Mercruiser 99356A2 Power Steering Cooler","description":"\u003cp\u003eThe Sierra 18-2587 is a replacement power steering and transmission oil cooler built for Mercruiser applications, directly replacing Mercruiser part number 99356A2. It is designed to dissipate heat from power steering fluid circulating through the system, with a rated capacity of 4 GPM maximum for power steering fluid and 25 GPM maximum for the raw water side that cools it.\u003c\/p\u003e\u003cp\u003eThe cooler features a 6 inch tube bundle with an overall length of 8 inches, and a water inlet and outlet sized at 1 1\/4 inches (31.8mm) to match standard hose fittings. It ships bare metal with a machined exterior finish, leaving it ready for the installer to apply primer and factory paint to match the surrounding engine components.\u003c\/p\u003e\u003cp\u003eThis cooler is intended as a direct fit replacement wherever the original Mercruiser 99356A2 power steering cooler is specified, making it a straightforward swap for a failed or corroded factory 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 18-2587\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Transmission Oil Cooler \/ Power Steering Cooler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e Mercruiser 99356A2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Inlet\/Outlet:\u003c\/strong\u003e 1 1\/4 inches (31.8mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Bundle Length:\u003c\/strong\u003e 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Steering Fluid Flow Rate:\u003c\/strong\u003e 4 GPM maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Flow Rate:\u003c\/strong\u003e 25 GPM maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Bare metal, machined, ready for primer and factory paint\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.37 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282243630\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned as a replacement power steering cooler for Mercruiser applications.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser 99356A2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2587 replace?\u003c\/strong\u003e The Sierra 18-2587 replaces the Mercruiser power steering cooler with OEM part number 99356A2, making it a direct swap for that factory part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the overall length of this cooler?\u003c\/strong\u003e The Sierra 18-2587 has an overall length of 8 inches, built around a 6 inch tube bundle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size are the water inlet and outlet?\u003c\/strong\u003e The water inlet and outlet on the Sierra 18-2587 are sized at 1 1\/4 inches, or 31.8mm.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat flow rates is this cooler rated for?\u003c\/strong\u003e It is rated for a maximum of 4 GPM of power steering fluid and a maximum of 25 GPM of water flow on the cooling side.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2587 come painted?\u003c\/strong\u003e No, it ships bare metal with a machined exterior finish, ready for the installer to apply primer and factory paint to match the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2587 weigh?\u003c\/strong\u003e The Sierra 18-2587 transmission oil cooler weighs 1.37 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a power steering cooler or a transmission cooler?\u003c\/strong\u003e It functions as a power steering cooler for Mercruiser applications, cooling power steering fluid using raw water flow through the tube bundle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this fit my Mercruiser?\u003c\/strong\u003e The Sierra 18-2587 is built as a replacement for the Mercruiser 99356A2 power steering cooler, so it fits wherever that original part is specified.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this part?\u003c\/strong\u003e The UPC for the Sierra 18-2587 transmission oil cooler is 808282243630.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2587 an OEM or aftermarket part?\u003c\/strong\u003e It is a Sierra-branded aftermarket replacement engineered to match the fit and function of the OEM Mercruiser 99356A2 power steering cooler.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107374811,"sku":"SIE-18-2587","price":227.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__29232.1753840674.500.750.jpg?v=1785188247"},{"product_id":"sierra-18-2588-marine-transmission-oil-cooler-1-1-4-water-3-8-npt-oil-chrysler-inboard","title":"Sierra Transmission Oil Cooler 18-2588 for Chrysler Inboard Engines, 1 1\/4 Inch Water Inlet","description":"\u003cp\u003eThe Sierra 18-2588 Transmission Oil Cooler is a bare metal marine transmission oil cooler built for Chrysler Inboard applications. It uses a 1 1\/4 inch water hose connection and a 10 inch tube bundle with an overall length of 12 inches, giving it the cooling surface needed to keep transmission oil temperature under control during sustained inboard operation.\u003c\/p\u003e\u003cp\u003eOil enters and exits through a 9 inch x 2 inch fitting with a 3\/8 inch NPT inlet\/outlet, and the unit is rated for up to 6 GPM of oil flow and up to 25 GPM of water flow. It ships bare metal, ready for primer and factory paint finish, so it can be finished to match the engine compartment or left as-is for service use. The stainless steel construction is built to hold up in the marine environment where the cooler is mounted in the raw water cooling circuit.\u003c\/p\u003e\u003cp\u003eThis oil cooler is designed as a direct-fit replacement for the transmission cooling system on Chrysler Inboard engines, giving boat owners a straightforward way to restore proper transmission oil temperature control without modifying existing hose and fitting connections.\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 18-2588\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Chrysler Inboard Transmission Cooler\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Hose Connection:\u003c\/strong\u003e 1 1\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Fitting:\u003c\/strong\u003e 9 inch x 2 inch, 3\/8 inch NPT inlet\/outlet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Flow Rate:\u003c\/strong\u003e 6 GPM maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Flow Rate:\u003c\/strong\u003e 25 GPM maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTube Bundle Length:\u003c\/strong\u003e 10 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length:\u003c\/strong\u003e 12 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Inlet and Outlet:\u003c\/strong\u003e 1 1\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Bare metal, ready for primer and factory paint finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 2.83 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eChrysler Inboard engines using a transmission oil cooler with a 1 1\/4 inch water hose connection.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2588 transmission oil cooler fit?\u003c\/strong\u003e The Sierra 18-2588 is built as a transmission oil cooler for Chrysler Inboard engines, using a 1 1\/4 inch water hose connection to tie into the existing raw water cooling circuit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the water hose connection?\u003c\/strong\u003e The 18-2588 uses a 1 1\/4 inch water hose connection on both the inlet and outlet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow large is the cooler's tube bundle?\u003c\/strong\u003e The tube bundle measures 10 inches, with an overall unit length of 12 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size are the oil fittings?\u003c\/strong\u003e Oil fittings on the 18-2588 measure 9 inch x 2 inch with a 3\/8 inch NPT inlet and outlet connection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the maximum oil and water flow rating?\u003c\/strong\u003e The Sierra 18-2588 is rated for up to 6 GPM of oil flow and up to 25 GPM of water flow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2588 come painted?\u003c\/strong\u003e No, it ships bare metal and is ready for primer and factory paint finish, so it can be painted to match the engine before or after installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the cooler made from?\u003c\/strong\u003e The Sierra 18-2588 transmission oil cooler is constructed from stainless steel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2588 weigh?\u003c\/strong\u003e This transmission oil cooler weighs 2.83 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2588 a direct replacement for the factory Chrysler Inboard transmission cooler?\u003c\/strong\u003e Yes, the 18-2588 is designed to replace the Chrysler Inboard transmission oil cooler using the same 1 1\/4 inch water hose connection and NPT oil fitting sizing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order part number 18-2588?\u003c\/strong\u003e Ordering 18-2588 gets you the complete transmission oil cooler unit, ready for installation once primed and painted as needed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this cooler be installed without additional plumbing modifications?\u003c\/strong\u003e Because the 18-2588 uses the standard 1 1\/4 inch water connection and 3\/8 inch NPT oil fitting, it is intended to connect using the same hose and fitting sizes as the original Chrysler Inboard transmission cooler.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107505883,"sku":"SIE-18-2588","price":282.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__06593.1753840675.500.750.jpg?v=1785188585"},{"product_id":"sierra-18-2563-9-impeller-gasket-2-pack-for-honda-bf8-bf9-9-bf15-bf20-outboards-replaces-19232-zw1-003","title":"Sierra 18-2563-9 Impeller Gasket, Replaces Honda 19232-ZW1-003, Fits BF8\/BF9.9\/BF15\/BF20 Outboards - Pack of 2","description":"\u003cp\u003eThe Sierra 18-2563-9 Impeller Gasket is a glass-material gasket engineered to seal the water pump housing on select Honda BF-series outboards. Sold in a pack of 2, it gives owners a spare on hand for the next scheduled water pump service, since impeller gaskets are a wear item that should be replaced whenever the housing is opened. Each gasket is manufactured to meet or exceed original equipment quality, so it seals and fits like the factory part it replaces.\u003c\/p\u003e\u003cp\u003eThis gasket fits Honda BF8 outboards from 2002 and up, BF9.9 outboards from 2002 and up, and BF15 and BF20 outboards from 2003 and up. It directly replaces the Honda OEM gasket numbered 19232-ZW1-003, making it a straightforward drop-in during impeller replacement or general water pump maintenance. At 0.25 inches thick, it is sized to match the original gasket's sealing profile.\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 18-2563-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Impeller Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e Pack of 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Glass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThickness:\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\u003eOEM Cross Reference:\u003c\/strong\u003e 19232-ZW1-003\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Honda BF8 (2002 \u0026amp; Up), BF9.9 (2002 \u0026amp; Up), BF15 (2003 \u0026amp; Up), BF20 (2003 \u0026amp; Up)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282162979\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHonda BF8, 2002 \u0026amp; Up\u003c\/li\u003e\n\u003cli\u003eHonda BF9.9, 2002 \u0026amp; Up\u003c\/li\u003e\n\u003cli\u003eHonda BF15, 2003 \u0026amp; Up\u003c\/li\u003e\n\u003cli\u003eHonda BF20, 2003 \u0026amp; Up\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e19232-ZW1-003\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat outboards does the Sierra 18-2563-9 impeller gasket fit?\u003c\/strong\u003e It fits Honda BF8 outboards from 2002 and up, BF9.9 outboards from 2002 and up, and BF15 and BF20 outboards from 2003 and up.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket replace the Honda OEM part?\u003c\/strong\u003e Yes, the Sierra 18-2563-9 directly replaces Honda OEM gasket number 19232-ZW1-003.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package?\u003c\/strong\u003e The 18-2563-9 is sold as a pack of 2 gaskets, giving you a spare for the next water pump service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the impeller gasket made from?\u003c\/strong\u003e The Sierra 18-2563-9 gasket is made of glass material.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow thick is the Sierra 18-2563-9 gasket?\u003c\/strong\u003e It measures 0.25 inches thick.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the gasket weigh?\u003c\/strong\u003e Each pack of the Sierra 18-2563-9 weighs 0.02 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace this impeller gasket?\u003c\/strong\u003e Replace the gasket any time the water pump housing on a compatible Honda BF outboard is opened, such as during impeller replacement or routine water pump maintenance, since gaskets should not be reused.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2563-9 genuine Honda or aftermarket?\u003c\/strong\u003e It is a Sierra-manufactured aftermarket gasket built to meet or exceed the quality of the original Honda 19232-ZW1-003 equipment it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this gasket work on a Honda BF20 from any year?\u003c\/strong\u003e It is confirmed for Honda BF20 outboards from 2003 and up; earlier BF20 model years are not covered by this listing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-2563-9?\u003c\/strong\u003e Your order includes 2 impeller gaskets, part number Sierra 18-2563-9, with no additional hardware.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use 18-2563-9 on a BF9.9 built before 2002?\u003c\/strong\u003e No, the Sierra 18-2563-9 is specified for Honda BF9.9 outboards from 2002 and up only.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107571419,"sku":"SIE-18-2563-9","price":5.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2563-9__47882.1737841523.500.750.jpg?v=1785187970"},{"product_id":"sierra-18-2557-9-impeller-gasket-2-pack-replaces-oem-332108-fits-3-cylinder-evinrude-johnson-outboards","title":"Sierra 18-2557-9 Impeller Gasket - Replaces 332108 - Fits 3 Cylinder Outboards - Pack of 2","description":"\u003cp\u003eThe Sierra 18-2557-9 Impeller Gasket is a replacement gasket engineered to seal the water pump impeller housing on 3 cylinder outboard engines. Sold as a pack of 2, it gives you a spare on hand for the next service interval or lets you replace both gaskets in a two-pump job without ordering twice. Each gasket measures 0.25 inches in thickness, matching the original equipment specification so the impeller housing seats correctly and maintains proper cooling water flow.\u003c\/p\u003e\u003cp\u003eThis gasket is manufactured to meet or exceed the quality of the original equipment part it replaces, helping prevent water intrusion and pump housing leaks that can lead to overheating. It is a straightforward, inexpensive part to swap during a routine impeller replacement or whenever the water pump housing is opened up for inspection.\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 18-2557-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e Pack of 2 gaskets\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 808282162917\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e 3 cylinder outboard engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 332108\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3 cylinder outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e332108\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2557-9 impeller gasket fit?\u003c\/strong\u003e This gasket is designed for 3 cylinder outboard engines and seals the water pump impeller housing on that engine family.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a pack?\u003c\/strong\u003e The 18-2557-9 is sold as a pack of 2 gaskets, giving you a spare or enough for two separate installations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-2557-9 replace?\u003c\/strong\u003e It replaces OEM part number 332108, so it can be used as a direct equivalent for that reference number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow thick is the 18-2557-9 gasket?\u003c\/strong\u003e Each gasket measures 0.25 inches thick, matching the original specification for a proper seal against the impeller housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2557-9 weigh?\u003c\/strong\u003e The pack weighs 0.02 pounds, reflecting the lightweight nature of a thin gasket set.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e The Sierra 18-2557-9 is an aftermarket gasket manufactured to meet or exceed the quality of the original equipment part it replaces, OEM number 332108.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace this gasket?\u003c\/strong\u003e Replace the 18-2557-9 gasket any time the water pump impeller housing is opened for an impeller swap or inspection, since a reused gasket can leak.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this product?\u003c\/strong\u003e The UPC for the Sierra 18-2557-9 impeller gasket pack is 808282162917.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use this gasket on a V-6 or V-8 engine?\u003c\/strong\u003e No, the 18-2557-9 is specified for 3 cylinder outboard engines only; V-4, V-6, and V-8 applications use a different Sierra gasket part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the package?\u003c\/strong\u003e The package contains 2 impeller gaskets, part number 18-2557-9, with no additional hardware included.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107604187,"sku":"SIE-18-2557-9","price":5.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2557-9__12978.1737834215.500.750.jpg?v=1785188005"},{"product_id":"sierra-18-2608-water-pump-gasket-for-honda-bf8a-8-hp-outboard-honda-code-6315386-mpn-118-2608","title":"Sierra 18-2608 Water Pump Gasket for Honda BF8A 8 HP Outboard Motors","description":"\u003cp\u003eThe Sierra 18-2608 is a water pump gasket engineered for Honda BF8A 8 HP outboard motors. It is the gasket component of the water pump impeller service kit, designed to seal the water pump housing against the powerhead so the impeller can draw and circulate cooling water without leaks. Replacing this gasket is a standard part of a water pump service, typically performed alongside the impeller itself to restore proper cooling system sealing and prevent water intrusion or loss of pump pressure.\u003c\/p\u003e\u003cp\u003eThis gasket is sold as an individual component, separate from the impeller and the housing, so it can be used on its own for a gasket-only refresh or as part of a complete water pump rebuild. It is manufactured to fit the specified Honda BF8A engine coverage listed below, using the Honda engine code referenced for this 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 18-2608\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282227784\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.01 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Make:\u003c\/strong\u003e Honda\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Model:\u003c\/strong\u003e BF8A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHorsepower:\u003c\/strong\u003e 8 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonda Engine Code:\u003c\/strong\u003e 6315386\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHonda BF8A, 8 HP, model years 1998-00\u003c\/li\u003e\n\u003cli\u003eHonda BF8A, 8 HP, model years 2003-06\u003c\/li\u003e\n\u003cli\u003eHonda BF8A, 8 HP, K0\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2608 gasket used for?\u003c\/strong\u003e The Sierra 18-2608 is a water pump gasket for Honda BF8A 8 HP outboard motors, used to seal the water pump housing during a water pump or impeller service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2608 gasket fit Honda BF8A 8 HP outboards?\u003c\/strong\u003e Yes, the 18-2608 gasket is fitted to Honda BF8A 8 HP outboard motors covering model years 1998-00, 2003-06, and K0.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket come with the impeller or housing?\u003c\/strong\u003e No, Sierra 18-2608 is the gasket only; the impeller and housing for the Honda BF8A water pump are separate part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2608 gasket weigh?\u003c\/strong\u003e The Sierra 18-2608 gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat Honda engine code corresponds to this gasket's fitment?\u003c\/strong\u003e The Honda engine code associated with the BF8A 8 HP fitment for the 18-2608 gasket is 6315386.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2608 an OEM Honda part?\u003c\/strong\u003e The 18-2608 is a Sierra-branded gasket manufactured to fit Honda BF8A 8 HP outboard motors; it is not an OEM Honda-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eShould the gasket be replaced when servicing the water pump impeller?\u003c\/strong\u003e Yes, replacing the gasket along with the impeller during a Honda BF8A water pump service helps ensure a proper seal and prevent cooling system leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2608 gasket fit Honda BF8A engines with K2 or K3 codes?\u003c\/strong\u003e The 18-2608 fitment listing for Honda BF8A includes K0; K2 and K3 designations are not listed for this specific gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when ordering the 18-2608?\u003c\/strong\u003e Ordering the Sierra 18-2608 includes the single water pump gasket only, without the impeller or housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2608 gasket specific to the BF8A model only?\u003c\/strong\u003e Yes, based on its listed fitment, the Sierra 18-2608 gasket is specified for the Honda BF8A 8 HP outboard motor.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988107735259,"sku":"SIE-18-2608","price":5.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2608_lg__41958.1558122211.500.750.jpg?v=1785329144"},{"product_id":"wear-plate-gasket-2-pack-replaces-mercury-322858-fits-v-4-v-6-outboards-sierra-18-2709","title":"Sierra Wear Plate Gasket 18-2709-9, Replaces Mercury 336530, V-4\/V-6 Outboard, Pack of 2","description":"\u003cp\u003eThe Sierra Wear Plate Gasket, part number 18-2709-9, seals the wear plate against the water pump housing on V-4\/V-6 Mercury outboard engines. This gasket is a critical component of the lower unit water pump assembly, forming the seal that keeps cooling water flowing through the correct passages and prevents leaks or loss of pump pressure that can lead to overheating. Each package contains 2 gaskets, so buyers replacing a full water pump kit or servicing multiple units have enough material on hand without ordering twice.\u003c\/p\u003e\u003cp\u003eWear plate gaskets are a wear item that should be replaced any time the water pump housing is removed for service, since a reused or hardened gasket will not seal properly against the wear plate and can allow water to bypass the impeller housing. Installing a fresh 18-2709-9 gasket during every water pump rebuild helps maintain proper cooling system pressure and reduces the risk of a repeat teardown. The gasket is sized specifically for V-4\/V-6 Mercury outboard water pump assemblies and directly replaces Mercury part number 336530.\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 18-2709-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Wear Plate Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaging:\u003c\/strong\u003e Pack of 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.02 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e V-4\/V-6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Mercury Outboard Parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282163150\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eV-4\/V-6 Mercury outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury 336530\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the 18-2709-9 wear plate gasket fit?\u003c\/strong\u003e The 18-2709-9 wear plate gasket is designed for V-4\/V-6 Mercury outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this gasket cross-reference to an OEM Mercury part number?\u003c\/strong\u003e Yes, Sierra 18-2709-9 replaces Mercury part number 336530.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in one package of 18-2709-9?\u003c\/strong\u003e Each package of the 18-2709-9 wear plate gasket contains 2 gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2709-9 wear plate gasket weigh?\u003c\/strong\u003e The Sierra 18-2709-9 wear plate gasket weighs 0.02 pounds per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the wear plate gasket be replaced?\u003c\/strong\u003e Any time the water pump housing is removed for service on a V-4\/V-6 Mercury outboard, the 18-2709-9 wear plate gasket should be replaced rather than reused, since a worn gasket will not seal properly against the wear plate.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this an aftermarket or genuine Mercury part?\u003c\/strong\u003e Sierra 18-2709-9 is an aftermarket gasket manufactured to replace Mercury OEM part 336530, offering the same fit and seal at the wear plate location.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat does the wear plate gasket seal against?\u003c\/strong\u003e It seals the wear plate against the water pump housing, maintaining proper cooling water flow through the lower unit on V-4\/V-6 Mercury outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I buy just one gasket instead of the 2-pack?\u003c\/strong\u003e The 18-2709-9 wear plate gasket is sold only in a package of 2, which is enough for a full water pump service or two separate repairs.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does a worn or reused gasket cause overheating?\u003c\/strong\u003e If the wear plate gasket does not seal completely, water can bypass the impeller housing and reduce pump pressure, which can lead to overheating in the V-4\/V-6 Mercury outboard cooling system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs a UPC code available for this gasket for retail tracking?\u003c\/strong\u003e Yes, the Sierra 18-2709-9 wear plate gasket package carries UPC 808282163150.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988109209819,"sku":"SIE-18-2709-9","price":3.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/sierra_lg_1206__66188.1558125519.500.750.jpg?v=1785329193"},{"product_id":"sierra-18-2733-water-shutter-for-mercruiser-stern-drive-replaces-92802-pkg-of-2","title":"Sierra 18-2733 Water Shutter, Replaces 92802 and 99370A2, Package of 2","description":"\u003cp\u003eThe Sierra 18-2733 is a marine water shutter designed for stern drive cooling systems, sold as a package of 2. Water shutters regulate raw water flow through the exhaust and cooling passages, helping maintain proper engine operating temperature and preventing exhaust water from backing up into the engine when it is not running. This part is built to meet or exceed the specifications of the original equipment it replaces, making it a direct, reliable substitute for worn or failed shutters.\u003c\/p\u003e\u003cp\u003eMeasuring 3.175 inches in length and 2.5 inches in width, the 18-2733 is manufactured under the Sierra brand for durability in continuous exposure to raw water and marine exhaust conditions. It replaces OEM numbers 92802 and 99370A2, so it fits applications originally equipped with either of those parts. Because it ships as a package of 2 and is priced per package, buyers replacing shutters in pairs can source both from a single part number.\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 18-2733\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 3.175 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.14 pounds\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\u003eUPC:\u003c\/strong\u003e 808282124670\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eFits applications originally equipped with OEM water shutter 92802 or 99370A2\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e92802\u003c\/li\u003e\n\u003cli\u003e99370A2\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2733 water shutter do?\u003c\/strong\u003e It regulates raw water flow through a stern drive's cooling and exhaust passages, helping the engine reach and hold proper operating temperature and limiting water backing up into the exhaust when the engine is off.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many shutters come in a package of the 18-2733?\u003c\/strong\u003e The 18-2733 is sold as a package of 2 and is priced per package, not per individual shutter.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the Sierra 18-2733 replace?\u003c\/strong\u003e It replaces OEM numbers 92802 and 99370A2, so either of those part numbers can be cross-referenced to the 18-2733.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-2733 water shutter?\u003c\/strong\u003e It measures 3.175 inches in length and 2.5 inches in width.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2733 weigh?\u003c\/strong\u003e Each package weighs 0.14 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2733 an OEM part or an aftermarket replacement?\u003c\/strong\u003e The 18-2733 is a Sierra-brand replacement part engineered to meet or exceed the specifications of the original equipment water shutter it replaces (92802 or 99370A2).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2733 fit any boat with a water shutter?\u003c\/strong\u003e It is a direct replacement only for applications that originally used OEM water shutter 92802 or 99370A2; confirm your original part number before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the Sierra 18-2733?\u003c\/strong\u003e One package containing 2 water shutters (Sierra part number 18-2733) is included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2733 water shutter?\u003c\/strong\u003e The UPC is 808282124670.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I order a single water shutter instead of a pair?\u003c\/strong\u003e No, the Sierra 18-2733 is packaged and priced as a set of 2 shutters.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988109603035,"sku":"SIE-18-2733","price":26.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2733_lg__12501.1558123391.500.750.jpg?v=1785188495"},{"product_id":"sierra-18-2732-9-water-shutter-for-mercruiser-stern-drives-replaces-oem-60930-pack-of-2","title":"Sierra 18-2732-9 Water Shutter, Replaces 60930, for Mercruiser Stern Drives - Pack of 2","description":"\u003cp\u003eThe Sierra 18-2732-9 Water Shutter is a metal water shutter designed for use with Mercruiser stern drives, sold as a pack of two so both shutters can be replaced together. Water shutters mount in the drive's water intake path and regulate cooling water flow, an important wear item to inspect and replace when servicing a stern drive's cooling system. Each shutter measures 6.125 inches in length by 2.360 inches in width and is finished in black metal construction built to hold up in the marine cooling environment.\u003c\/p\u003e\u003cp\u003eThis part is manufactured to meet or exceed the original equipment part it replaces, giving boat owners a direct, reliable replacement option when the original shutter has worn out or is no longer available. Because it ships as a pack of two, it is well suited to servicing both shutters in a stern drive at the same time rather than ordering single units 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 18-2732-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Shutter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 2 water shutters per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 6.125 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 2.360 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.14 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282166823\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercruiser stern drives\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 60930\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for use with Mercruiser stern drives.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e60930\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2732-9 water shutter fit?\u003c\/strong\u003e The Sierra 18-2732-9 water shutter is designed for use with Mercruiser stern drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-2732-9 replace?\u003c\/strong\u003e It replaces OEM part number 60930, so it can be ordered as a direct replacement for that original part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many water shutters come in this package?\u003c\/strong\u003e This listing is for a pack of 2 water shutters, part number 18-2732-9, so both units in a stern drive can be replaced at once.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-2732-9 water shutter made of?\u003c\/strong\u003e It is made of metal, finished in black, for durability in the marine cooling environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-2732-9 water shutter?\u003c\/strong\u003e Each shutter measures 6.125 inches in length by 2.360 inches in width.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2732-9 water shutter weigh?\u003c\/strong\u003e The 18-2732-9 water shutter weighs 0.14 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2732-9 a genuine OEM part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra aftermarket replacement manufactured to meet or exceed the original equipment part it replaces, part number 60930.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the 18-2732-9 be used to replace just one shutter, or must both be replaced?\u003c\/strong\u003e The 18-2732-9 is sold as a pack of 2, so while both are included, buyers servicing only one shutter can retain the extra unit for a future replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2732-9 water shutter pack?\u003c\/strong\u003e The UPC for the Sierra 18-2732-9 two-pack water shutter is 808282166823.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the Sierra 18-2732-9 water shutter work with inboard engines?\u003c\/strong\u003e No, the 18-2732-9 water shutter is designed for use with Mercruiser stern drives, not inboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my Mercruiser stern drive needs a new water shutter?\u003c\/strong\u003e A worn or damaged water shutter can affect cooling water flow in a Mercruiser stern drive; if the original shutter matching OEM number 60930 is worn, the Sierra 18-2732-9 is a direct replacement.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988109701339,"sku":"SIE-18-2732-9","price":73.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__13204.1771533092.500.750.jpg?v=1785188147"},{"product_id":"sierra-18-2774-molded-hose-for-volvo-penta-aq290-aq290dp-replaces-oem-875847-includes-2-clamps","title":"Sierra Molded Hose 18-2774, Replaces 875847, for Volvo Penta AQ290, AQ290DP","description":"\u003cp\u003eThe Sierra 18-2774 is a molded cooling system hose engineered as a direct replacement for the OEM part on Volvo Penta AQ290 and AQ290DP sterndrive engines. Unlike straight-cut hose sold by the foot, this hose is molded to the exact bends and contours required by the original cooling system routing, so it seats correctly without kinking or restricting coolant flow. It is built to handle the heat, pressure, and constant exposure to raw water or coolant found in a marine engine bay, making it a durable option for restoring proper cooling system integrity.\u003c\/p\u003e\u003cp\u003eEach 18-2774 hose ships complete with two 18-7306 clamps, so the kit includes everything needed to remove the old, cracked, or collapsed hose and install the new one without sourcing separate hardware. This makes it a straightforward replacement for engine owners performing routine cooling system maintenance or repairing a failed hose before it leads to overheating or coolant loss.\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 18-2774\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Molded Hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Volvo Penta Engine Hoses\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.58 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999313072\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes:\u003c\/strong\u003e (2) 18-7306 Clamps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 875847\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eVolvo Penta AQ290\u003c\/li\u003e\n\u003cli\u003eVolvo Penta AQ290DP\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e875847\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2774 fit?\u003c\/strong\u003e The Sierra 18-2774 molded hose fits Volvo Penta AQ290 and AQ290DP sterndrive engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part does 18-2774 replace?\u003c\/strong\u003e It replaces Volvo Penta OEM part number 875847.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre clamps included with the 18-2774 hose?\u003c\/strong\u003e Yes, the 18-2774 hose ships with two 18-7306 clamps, so no separate clamp purchase is needed for installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2774 a straight length of hose or molded to shape?\u003c\/strong\u003e It is a molded hose, formed to the specific bends of the Volvo Penta AQ290 and AQ290DP cooling system rather than a straight-cut universal hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2774 hose weigh?\u003c\/strong\u003e The Sierra 18-2774 molded hose weighs 0.58 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat system does the 18-2774 hose belong to?\u003c\/strong\u003e The 18-2774 is part of the cooling system on applicable Volvo Penta I\/O engines, specifically the AQ290 and AQ290DP.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-7306 clamps included with the 18-2774 work on other hoses?\u003c\/strong\u003e The two 18-7306 clamps are included specifically with the Sierra 18-2774 molded hose kit for its installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2774 an OEM or aftermarket part?\u003c\/strong\u003e The Sierra 18-2774 is an aftermarket molded hose manufactured as a direct replacement for Volvo Penta OEM part 875847.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2774 hose?\u003c\/strong\u003e The UPC for the Sierra 18-2774 molded hose is 030999313072.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2774 fit other Volvo Penta AQ models besides AQ290?\u003c\/strong\u003e The Sierra 18-2774 is designated for the Volvo Penta AQ290 and AQ290DP; other AQ models use different Sierra hose part numbers.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988112847067,"sku":"SIE-18-2774","price":62.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2774_lg__41558.1558122699.500.750.jpg?v=1785329171"},{"product_id":"sierra-18-2775-marine-molded-hose-replaces-volvo-penta-875822-fits-aq-200-280-dp-stern-drive-units-includes-2-clamps","title":"Sierra 18-2775 Molded Hose for Volvo Penta Stern Drive, Replaces Volvo Penta 87582","description":"\u003cp\u003eThe Sierra 18-2775 Molded Hose is a marine-grade replacement hose engineered for Volvo Penta stern drive applications. Molded from synthetic rubber in white, it is built to meet or exceed the quality of the original equipment part it replaces, giving boat owners a dependable option for restoring proper cooling or fluid-routing function in the stern drive system. The hose is manufactured to a fit-specific shape rather than a generic cut length, so it seats correctly against factory mounting points without the fabrication or clamping workarounds that generic hose stock requires.\u003c\/p\u003e\u003cp\u003eThis molded construction resists the heat, oil exposure, and constant flex found in the stern drive environment, making it a straightforward swap for boaters doing routine maintenance or replacing a cracked, hardened, or leaking original hose. Because fit is application-specific, buyers should confirm the part number against their stern drive before ordering. The Sierra 18-2775 is intended as a direct interchange for the original Volvo Penta hose and select aftermarket equivalents, and it ships as a single hose 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 18-2775\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Synthetic Rubber\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 0.56 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecific Uses:\u003c\/strong\u003e Marine activities, water sports, boating\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for Volvo Penta stern drive applications; verify against your stern drive's original hose part number before ordering.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMallory 9-44004\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 87582\u003c\/li\u003e\n\u003cli\u003eVolvo Penta 875822\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2775 Molded Hose used for?\u003c\/strong\u003e The Sierra 18-2775 is a molded rubber hose designed for Volvo Penta stern drive applications, used to replace a worn, cracked, or leaking factory hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2775 a direct fit for Volvo Penta stern drives?\u003c\/strong\u003e Yes, the 18-2775 is molded to a fit-specific shape for Volvo Penta stern drive applications, so buyers should confirm the part number against their original hose before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the Sierra 18-2775 hose made from?\u003c\/strong\u003e It is made from synthetic rubber, finished in white, to withstand the heat and flex conditions found in a stern drive installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2775 hose weigh?\u003c\/strong\u003e The Sierra 18-2775 Molded Hose weighs 0.56 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM or aftermarket parts does the 18-2775 replace?\u003c\/strong\u003e The 18-2775 is designed to be interchangeable with Mallory 9-44004 and Volvo Penta 87582 (also referenced as 875822).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-2775 a genuine Volvo Penta part or aftermarket?\u003c\/strong\u003e It is a Sierra aftermarket hose manufactured to meet or exceed the quality of the original Volvo Penta equipment it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many hoses come in one Sierra 18-2775 package?\u003c\/strong\u003e One package of the Sierra 18-2775 contains a single molded hose.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2775 fit any stern drive hose application?\u003c\/strong\u003e No, this hose is fit-specific to Volvo Penta stern drive applications, so the exact part number should be checked against the original hose before purchase.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the Sierra 18-2775 be used for engine cooling hose replacement?\u003c\/strong\u003e The 18-2775 is a molded hose for the Volvo Penta stern drive system and is intended as a like-for-like replacement for the original hose in that application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-2775 hose?\u003c\/strong\u003e The Sierra 18-2775 Molded Hose is white.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988113109211,"sku":"SIE-18-2775","price":53.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2775_lg__98993.1558122749.500.750.jpg?v=1785188004"},{"product_id":"sierra-18-2777-water-hose-connection-replaces-volvo-penta-854031-fits-aq120b-aq290a-stern-drive","title":"Sierra 18-2777 Water Hose Connection, Replaces 854031, for Volvo Penta AQ151\/165\/170\/171 and BB165\/170 Stern Drive Engines","description":"\u003cp\u003eThe Sierra 18-2777 Water Hose Connection is a direct-fit replacement cooling system component for Volvo Penta stern drive engines. It connects the raw water hose to the engine cooling circuit, sealing the joint so cooling water is delivered without leaks under running pressure. Built from metal in a white finish, it is engineered to meet or exceed the performance of the original equipment part it replaces and to hold up in continuous marine service.\u003c\/p\u003e\u003cp\u003eThis water hose connection is a straightforward like-for-like swap for the original Volvo Penta fitting bearing part number 854031, making it a simple maintenance item when the factory connection has corroded, cracked, or is leaking at the hose joint. It is sized and shaped to match the original mounting points on applicable Volvo Penta AQ and BB series stern drive engines, so no modification is needed for installation.\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 18-2777\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Hose Connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 7 inches L x 6 inches W\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 030999313102\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 854031\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Volvo Penta AQ151B, AQ151C, AQ171A, AQ17C, AQ165A, AQ170A, AQ170B, AQ170C, BB165A, BB170A, BB170B, BB170C\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eVolvo Penta AQ151B\u003c\/li\u003e\n\u003cli\u003eVolvo Penta AQ151C\u003c\/li\u003e\n\u003cli\u003eVolvo Penta AQ171A\u003c\/li\u003e\n\u003cli\u003eVolvo Penta AQ17C\u003c\/li\u003e\n\u003cli\u003eVolvo Penta AQ165A\u003c\/li\u003e\n\u003cli\u003eVolvo Penta AQ170A\u003c\/li\u003e\n\u003cli\u003eVolvo Penta AQ170B\u003c\/li\u003e\n\u003cli\u003eVolvo Penta AQ170C\u003c\/li\u003e\n\u003cli\u003eVolvo Penta BB165A\u003c\/li\u003e\n\u003cli\u003eVolvo Penta BB170A\u003c\/li\u003e\n\u003cli\u003eVolvo Penta BB170B\u003c\/li\u003e\n\u003cli\u003eVolvo Penta BB170C\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e854031\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-2777 used for?\u003c\/strong\u003e The Sierra 18-2777 is a water hose connection that joins the raw water hose to the cooling system on applicable Volvo Penta stern drive engines, sealing the joint against leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-2777 replace?\u003c\/strong\u003e It replaces Volvo Penta part number 854031, so it is a direct match for that original fitting.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich engines is the Sierra 18-2777 designed to fit?\u003c\/strong\u003e It fits Volvo Penta AQ151B, AQ151C, AQ171A, AQ17C, AQ165A, AQ170A, AQ170B, AQ170C, BB165A, BB170A, BB170B, and BB170C stern drive engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-2777 water hose connection made from?\u003c\/strong\u003e It is made from metal with a white finish, built for continuous exposure to marine cooling water.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-2777?\u003c\/strong\u003e The part measures 7 inches long by 6 inches wide.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2777 weigh?\u003c\/strong\u003e It weighs 0.21 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-2777 a genuine OEM part or aftermarket?\u003c\/strong\u003e It is a Sierra-manufactured aftermarket replacement engineered to meet or exceed the performance of the original Volvo Penta water hose connection it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2777 come with a warranty?\u003c\/strong\u003e Yes, Sierra parts including the 18-2777 water hose connection are covered under Sierra's customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-2777?\u003c\/strong\u003e The order includes one Sierra 18-2777 water hose connection unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-2777 fit engines outside the listed Volvo Penta AQ and BB series?\u003c\/strong\u003e No, the Sierra 18-2777 is designed specifically for the listed Volvo Penta AQ151B, AQ151C, AQ171A, AQ17C, AQ165A, AQ170A, AQ170B, AQ170C, BB165A, BB170A, BB170B, and BB170C models, so fitment outside that list is not confirmed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my water hose connection needs replacing?\u003c\/strong\u003e Cracking, corrosion, or a leak at the raw water hose joint on the applicable Volvo Penta engine is a sign the connection, such as the Sierra 18-2777, needs replacement.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988113141979,"sku":"SIE-18-2777","price":47.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2777_lg__40542.1558122882.500.750.jpg?v=1785188366"},{"product_id":"sierra-18-2823-9-lower-water-pump-gasket-2-pack-replaces-mercury-27-19553-27-32769-fits-mercruiser-4-6-cyl-mercury-40-50-70-hp","title":"Sierra 18-2823-9 Lower Water Pump Gasket, Replaces 27-32769\/27-19553, Fits 40-50-70 HP Mercury Marine\/Mercruiser, Pack of 2","description":"\u003cp\u003eThe Sierra 18-2823-9 is a lower water pump gasket sold in a package of two, designed to seal the lower section of the water pump housing on 40-50-70 HP Mercury Marine and Mercruiser stern drive engines. This gasket sits between the water pump base and the lower housing, forming the seal that keeps raw cooling water flowing through the correct passages and prevents leaks at the pump base during operation. Because water pump gaskets harden, compress, and lose their seal over time, replacing this gasket is a standard step whenever the water pump is serviced, rebuilt, or has its impeller replaced.\u003c\/p\u003e\u003cp\u003eEach package includes two gaskets, so a single purchase covers a complete water pump service without needing a second order. The 18-2823-9 is built to the same fit and seal performance as the original equipment gasket it replaces, cross-referencing directly to OEM part numbers 27-32769 and 27-19553. Installing the correct lower water pump gasket helps maintain proper cooling system pressure and prevents water intrusion or leakage at the pump housing, which can otherwise lead to overheating or reduced water pump performance.\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 18-2823-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Water Pump Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 2 gaskets per package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHP Rating:\u003c\/strong\u003e 40-50-70 HP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Mercury Marine and Mercruiser stern drive engines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 27-32769, 27-19553\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 808282163303\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e40-50-70 HP Mercury Marine and Mercruiser stern drive engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-32769\u003c\/li\u003e\n\u003cli\u003e27-19553\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2823-9 gasket fit?\u003c\/strong\u003e The 18-2823-9 lower water pump gasket fits 40-50-70 HP Mercury Marine and Mercruiser stern drive engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in a package of 18-2823-9?\u003c\/strong\u003e Each package of the 18-2823-9 contains 2 lower water pump gaskets, enough for one complete water pump service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2823-9 gasket a direct OEM replacement?\u003c\/strong\u003e Yes, the 18-2823-9 is built to seal and fit the same as the original equipment gasket it replaces, matching OEM part numbers 27-32769 and 27-19553.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-2823-9 replace?\u003c\/strong\u003e The Sierra 18-2823-9 replaces OEM numbers 27-32769 and 27-19553.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere on the water pump does this gasket install?\u003c\/strong\u003e This gasket seals the lower section of the water pump housing, sitting between the pump base and the lower housing on the engine's water pump assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should I replace the lower water pump gasket?\u003c\/strong\u003e Replace the 18-2823-9 lower water pump gasket any time the water pump is serviced, rebuilt, or the impeller is replaced, since the old gasket can harden and lose its seal over time.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if I reuse the old gasket instead of installing a new 18-2823-9?\u003c\/strong\u003e A worn or hardened lower water pump gasket can leak at the pump base, allowing water intrusion or loss of cooling water pressure, so Sierra recommends installing a fresh 18-2823-9 during pump service rather than reusing the old gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-2823-9 gasket weigh?\u003c\/strong\u003e The Sierra 18-2823-9 lower water pump gasket package weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-2823-9 come with the impeller?\u003c\/strong\u003e No, the 18-2823-9 is the lower water pump gasket only, sold as a pack of 2; the impeller and impeller gasket are separate parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-2823-9 gasket engine-specific by horsepower?\u003c\/strong\u003e Yes, the 18-2823-9 is designed for the 40-50-70 HP range of Mercury Marine and Mercruiser stern drive engines.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988129984731,"sku":"SIE-18-2823-9","price":4.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2823-9__89603.1737854809.500.750.jpg?v=1785188268"},{"product_id":"sierra-18-2824-9-upper-water-pump-gasket-2-pack-for-mercury-40-50-70-hp-outboards-replaces-27-32771","title":"Sierra 18-2824-9 Upper Water Pump Gasket, Pack of 2, Replaces 27-32770, 27-19551","description":"\u003cp\u003eThe Sierra 18-2824-9 is an upper water pump gasket for Mercury marine applications, sold in a pack of 2. This gasket seals the upper section of the water pump housing to prevent leaks and maintain proper cooling water flow through the pump assembly. It is made of glass material, measures 0.25 inches thick, and is finished in black. Each Sierra gasket is manufactured to meet or exceed the specifications of the original equipment part it replaces, making it a reliable choice when servicing or rebuilding a water pump. Because gaskets degrade with heat cycling and age, replacing the upper water pump gasket during any water pump service or impeller replacement helps ensure a proper seal and prevents coolant water leaks. This listing includes two gaskets per package, so a spare is on hand for future service or for pumps requiring more than one gasket.\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 18-2824-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Upper Water Pump Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 2 gaskets\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Glass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Thickness:\u003c\/strong\u003e 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\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 808282163310\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercury marine applications\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-32770\u003c\/li\u003e\n\u003cli\u003e27-19551\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2824-9 gasket fit?\u003c\/strong\u003e The Sierra 18-2824-9 upper water pump gasket is designed for Mercury marine applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in this package?\u003c\/strong\u003e This package includes 2 gaskets, as the Sierra 18-2824-9 is sold in a pack of 2.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-2824-9 replace?\u003c\/strong\u003e It replaces Mercury OEM numbers 27-32770 and 27-19551.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the gasket made from?\u003c\/strong\u003e Glass is the material used for the Sierra 18-2824-9 upper water pump gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow thick is the gasket?\u003c\/strong\u003e 0.25 inches is the thickness of the Sierra 18-2824-9 gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-2824-9 gasket?\u003c\/strong\u003e Black is the color of this gasket.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the gasket weigh?\u003c\/strong\u003e The Sierra 18-2824-9 upper water pump gasket weighs 0.01 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part or aftermarket?\u003c\/strong\u003e The 18-2824-9 is a Sierra-branded gasket manufactured to meet or exceed the specifications of the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the upper water pump gasket be replaced?\u003c\/strong\u003e Replacing the upper water pump gasket is recommended during water pump service or impeller replacement to ensure a proper seal and prevent coolant water leaks.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs there a lower water pump gasket available separately?\u003c\/strong\u003e Yes, the upper water pump gasket (18-2824-9) is a distinct part from a lower water pump gasket, so buyers should confirm which position they need before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2824-9?\u003c\/strong\u003e The UPC for this pack of 2 upper water pump gaskets is 808282163310.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988130083035,"sku":"SIE-18-2824-9","price":3.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-2824-9__48151.1737896784.500.750.jpg?v=1785188602"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/collections\/shu-253-120-01_lg__60442.1558174835.500.750.jpg?v=1785359967","url":"https:\/\/www.goodvibesmarina.com\/collections\/gvcat-engine-parts-systems-cooling-system.oembed?page=7","provider":"Good Vibes Marina","version":"1.0","type":"link"}