{"product_id":"sierra-18-3289-double-lip-seal-for-mercruiser-gen-ii-upper-housing-replaces-26-864319-fits-alpha-one-bravo-i-ii-iii-and-r-mr-sterndrives","title":"Sierra 18-3289 Double Lip Seal, Replaces 26-864319, for Gen II Upper Housing","description":"\u003cp\u003eThe Sierra 18-3289 is a double lip seal designed for the Gen II upper housing on marine sterndrive applications. It serves as a direct replacement seal used during upper housing rebuilds and maintenance, helping keep lubricant contained and water out of the housing where it is installed. The double-lip design provides two sealing edges along the shaft, giving added protection against leakage compared to a single-lip seal.\u003c\/p\u003e\u003cp\u003eThis seal is a compact, purpose-built component intended for use on Mercury outboard and MerCruiser sterndrive applications that use the Gen II upper housing. It cross-references directly to OEM part number 26-864319, making it straightforward to identify as the correct replacement when servicing this housing. Each unit is sold individually and ships in compact packaging suited to a small precision 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 18-3289\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Double Lip Seal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Gen II Upper Housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 5.13 x 4 x 0.25 inches\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 808282185763\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits the Gen II upper housing on applicable Mercury outboard and MerCruiser sterndrive units.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e26-864319\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3289 seal fit?\u003c\/strong\u003e The Sierra 18-3289 is a double lip seal made for the Gen II upper housing on Mercury outboard and MerCruiser sterndrive units.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-3289 replace?\u003c\/strong\u003e Sierra 18-3289 replaces OEM part number 26-864319.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs 18-3289 a single or double lip seal?\u003c\/strong\u003e It is a double lip seal, meaning it has two sealing edges along the shaft rather than one, for added protection against leakage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many seals come in a package?\u003c\/strong\u003e The Sierra 18-3289 double lip seal is packaged and sold as a single unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-3289 seal package?\u003c\/strong\u003e The packaged Sierra 18-3289 seal measures 5.13 x 4 x 0.25 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3289 seal weigh?\u003c\/strong\u003e The Sierra 18-3289 double lip seal weighs 0.03 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is this seal installed on the housing?\u003c\/strong\u003e Sierra 18-3289 is installed in the Gen II upper housing as part of the seal assembly during rebuild or maintenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-3289 a genuine Sierra part or a generic aftermarket seal?\u003c\/strong\u003e 18-3289 is the Sierra manufacturer part number for this double lip seal; it is not a generic or unbranded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-3289 seal work on Mercury outboard motors?\u003c\/strong\u003e Yes, the Sierra 18-3289 double lip seal is used on Mercury outboard applications that use the Gen II upper housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes 18-3289 work for MerCruiser sterndrive units as well as outboards?\u003c\/strong\u003e The Sierra 18-3289 Gen II upper housing seal is used on both Mercury outboard and MerCruiser sterndrive applications that share this housing.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988143026395,"sku":"SIE-18-3289","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3289_lg__75132.1558125469.500.750.jpg?v=1785189095","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3289-double-lip-seal-for-mercruiser-gen-ii-upper-housing-replaces-26-864319-fits-alpha-one-bravo-i-ii-iii-and-r-mr-sterndrives","provider":"Good Vibes Marina","version":"1.0","type":"link"}