{"product_id":"lower-unit-seal-kit-for-mercruiser-bravo-i-ii-iii-sterndrives-replaces-26-76868a1-sierra-18-2645-1","title":"Sierra Lower Unit Seal Kit 18-2645-1, Replaces 26-76868A1, Fits Mercruiser Bravo I, II and III","description":"\u003cp\u003eThe Sierra Lower Unit Seal Kit, part number 18-2645-1, is a complete gasket and seal set for rebuilding the lower gear housing on Mercruiser Bravo I, II, and III stern drive units. Instead of sourcing individual gaskets and seals separately, this kit bundles the three components needed for a proper lower unit reseal into one part number, helping ensure nothing is missed during a rebuild or seal replacement job.\u003c\/p\u003e\u003cp\u003eThe kit contains a gear housing drain screw gasket (OE 12-19183, quantity 2), a water pocket cover gasket (OE 27-55810, quantity 1), and an oil seal (OE 26-823894). These components are cross-referenced to fit in place of the original Mercruiser parts and are commonly needed together whenever the lower unit is opened up for service, such as during a water pump replacement, gear lube change with inspection, or general lower unit maintenance.\u003c\/p\u003e\u003cp\u003eThis kit is designed specifically for Bravo I, II, and III model stern drives and carries OEM cross-reference numbers 26-76868A1, 26-76868A2, and 26-76868A04, so it can be matched against those Mercruiser part numbers when confirming fitment. The kit weighs 0.42 pounds as packaged.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-2645-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Lower Unit Seal Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Mercruiser Bravo I, II \u0026amp; III Models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross-Reference:\u003c\/strong\u003e 26-76868A1, 26-76868A2, 26-76868A04\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Gear Housing Drain Screw Gasket (OE 12-19183, Qty 2), Water Pocket Cover Gasket (OE 27-55810, Qty 1), Oil Seal (OE 26-823894)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.42 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 1.5 x 6 x 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282383237\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMercruiser Bravo I, II \u0026amp; III Models\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e26-76868A1\u003c\/li\u003e\n\u003cli\u003e26-76868A2\u003c\/li\u003e\n\u003cli\u003e26-76868A04\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-2645-1 lower unit seal kit fit?\u003c\/strong\u003e This kit is designed for Mercruiser Bravo I, II, and III model stern drives and is used when servicing the lower gear housing on those units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does 18-2645-1 replace?\u003c\/strong\u003e The kit cross-references to Mercruiser OEM numbers 26-76868A1, 26-76868A2, and 26-76868A04, so it can be used in place of any of those part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-2645-1 kit?\u003c\/strong\u003e Three components are included: a gear housing drain screw gasket (OE 12-19183, quantity 2), a water pocket cover gasket (OE 27-55810, quantity 1), and an oil seal (OE 26-823894).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many drain screw gaskets come in the kit?\u003c\/strong\u003e Two gear housing drain screw gaskets (OE 12-19183) are included in the 18-2645-1 kit, along with one water pocket cover gasket and one oil seal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-2645-1 seal kit weigh?\u003c\/strong\u003e The kit weighs 0.42 pounds as packaged.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of this kit?\u003c\/strong\u003e The Sierra 18-2645-1 lower unit seal kit measures 1.5 x 6 x 6 inches as packaged.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this an aftermarket or genuine Mercruiser part?\u003c\/strong\u003e 18-2645-1 is a Sierra-brand replacement kit manufactured to match the fit of the original Mercruiser components it cross-references, rather than a Mercruiser-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen would I need to replace the seals in this kit?\u003c\/strong\u003e These gaskets and the oil seal are typically replaced whenever the lower gear housing on a Bravo I, II, or III drive is opened for service, such as during a rebuild or water pump job, to ensure a proper seal is maintained.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this kit work on Bravo I, II, and III drives interchangeably?\u003c\/strong\u003e Yes, the Sierra 18-2645-1 kit is listed for Bravo I, II, and III model stern drives.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-2645-1 kit?\u003c\/strong\u003e The UPC for this Lower Unit Seal Kit is 808282383237.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988108292315,"sku":"SIE-18-2645-1","price":119.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-2645-1__51233.1737875437.500.750.jpg?v=1785188896","url":"https:\/\/www.goodvibesmarina.com\/products\/lower-unit-seal-kit-for-mercruiser-bravo-i-ii-iii-sterndrives-replaces-26-76868a1-sierra-18-2645-1","provider":"Good Vibes Marina","version":"1.0","type":"link"}