{"product_id":"sierra-18-0203-9-bell-housing-washer-replaces-mercruiser-12-35935-fits-all-mercruiser-sterndrives-1963-1998-pack-of-5","title":"Sierra 18-0203-9 Bell Housing Washer, Replaces Mercruiser 12-29395, Fits Sterndrives 1963-1998, Pack of 5","description":"\u003cp\u003eThe Sierra 18-0203-9 Bell Housing Washer is a brass conical spring washer designed for use at the bell housing joint on Mercruiser sterndrive units. It is sold in a package of 5, matching the quantity typically needed for a bell housing service or rebuild job. The conical spring design allows the washer to provide consistent seating pressure at the fastener location, helping maintain a secure, properly torqued connection during reassembly.\u003c\/p\u003e\u003cp\u003eBuilt from brass, the washer resists corrosion in the marine environment better than uncoated steel alternatives, which matters given its location near the drive unit and exposure to bilge moisture and saltwater spray. Each washer measures 0.39 x 0.39 x 0.39 inches. The Sierra 18-0203-9 is intended as a direct equivalent for the original equipment washer it replaces, so it installs using the same fasteners and orientation as the factory part with no modification required.\u003c\/p\u003e\u003cp\u003eThis washer fits all Mercruiser sterndrives from 1963 to 1998, making it a common replacement part for owners doing bell housing maintenance, gasket replacement, or a full drive service on older Mercruiser-powered boats. Because it is sold in a 5-pack, it is priced and packaged for a complete job rather than a single washer replacement.\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 18-0203-9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Bell Housing Washer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWasher Type:\u003c\/strong\u003e Conical Spring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Brass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.05 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282166816\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eAll Mercruiser sterndrives, 1963-1998\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e12-29395\u003c\/li\u003e\n\u003cli\u003e12-8M0042641\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-0203-9 washer fit?\u003c\/strong\u003e The Sierra 18-0203-9 Bell Housing Washer fits all Mercruiser sterndrives from 1963 to 1998.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many washers come in a pack?\u003c\/strong\u003e The 18-0203-9 is sold in a package of 5 brass bell housing washers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does this washer replace?\u003c\/strong\u003e Sierra 18-0203-9 replaces OEM numbers 12-29395 and 12-8M0042641.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the bell housing washer made from?\u003c\/strong\u003e It is made from brass, which resists corrosion better than uncoated steel in a marine bilge environment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is the Sierra 18-0203-9 washer?\u003c\/strong\u003e Each washer in the 18-0203-9 pack measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat type of washer is this?\u003c\/strong\u003e The 18-0203-9 is a conical spring washer, which provides consistent seating pressure at the bell housing fastener.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-0203-9 an aftermarket or genuine Mercruiser part?\u003c\/strong\u003e It is a Sierra aftermarket washer manufactured to be a direct equivalent to the original Mercruiser bell housing washer it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-0203-9 washer pack weigh?\u003c\/strong\u003e The full package of 5 Sierra 18-0203-9 washers weighs 0.05 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a full pack of 5 for a bell housing job?\u003c\/strong\u003e The 18-0203-9 is packaged in quantities of 5 to match a typical bell housing service, though exact usage depends on the specific job.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this washer work on a Mercruiser from the 2000s?\u003c\/strong\u003e The Sierra 18-0203-9 is specified for Mercruiser sterndrives from 1963 to 1998; fitment outside that range is not confirmed for this part.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988057960667,"sku":"SIE-18-0203-9","price":12.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-0203_lg__56485.1558119673.500.750.jpg?v=1785187970","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-0203-9-bell-housing-washer-replaces-mercruiser-12-35935-fits-all-mercruiser-sterndrives-1963-1998-pack-of-5","provider":"Good Vibes Marina","version":"1.0","type":"link"}