{"product_id":"water-pump-kit-with-housing-6h4-w0078-00-for-yamaha-40-50-pro50-hp-outboards-1984-1987-sierra-18-3408","title":"Sierra Water Pump Kit with Housing 18-3408, Replaces 6H4-W0078-00-A0, for Yamaha 40\/50\/Pro50 HP Outboards (1984-1987)","description":"\u003cp\u003eThe Sierra 18-3408 is a complete water pump kit with housing, engineered as a direct replacement for the factory water pump assembly on select Yamaha outboard engines. The kit is built around a new water pump housing along with the mounting hardware needed to complete the water pump service, so the cooling system component that fails most often on these outboards can be replaced without sourcing individual pieces separately. Sierra assembles its water pump kits to meet or exceed original equipment specifications, giving boaters a dependable way to restore proper raw-water cooling flow to the engine.\u003c\/p\u003e\u003cp\u003eThis kit is designed to fit Yamaha 40 HP (1984-1987), 50 HP (1984-1987), and Pro50 (1987) outboard engines. It replaces the OEM Yamaha water pump components identified below, and the housing itself is a metal construction for durability in the marine cooling system environment. Regular water pump service is a key part of outboard maintenance, and using a housing kit matched to the correct OEM part numbers helps ensure proper fit and sealing against the powerhead.\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 18-3408\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Kit with Housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes Housing:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.89 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282286989\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Yamaha 40 HP (1984-1987), 50 HP (1984-1987), Pro50 (1987) outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 6H4-W0078-00-A0, 663-44311-02\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Water Pump Housing (O.E. 6J8-44311-00-00), Bolt (O.E. 97095-08045-00)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYamaha 40 HP outboard, 1984-1987\u003c\/li\u003e\n\u003cli\u003eYamaha 50 HP outboard, 1984-1987\u003c\/li\u003e\n\u003cli\u003eYamaha Pro50 outboard, 1987\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e6H4-W0078-00-A0\u003c\/li\u003e\n\u003cli\u003e663-44311-02\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3408 water pump kit include?\u003c\/strong\u003e The kit includes a water pump housing (O.E. Equivalent 6J8-44311-00-00) and a mounting bolt (O.E. Equivalent 97095-08045-00). It is sold as the 18-3408 water pump kit with housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3408 kit include the pump housing?\u003c\/strong\u003e Yes, the Sierra 18-3408 is a water pump kit that comes with the housing included, not just internal service parts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhich Yamaha outboard motors fit the Sierra 18-3408 water pump kit?\u003c\/strong\u003e It fits Yamaha 40 HP (1984-1987), 50 HP (1984-1987), and Pro50 (1987) outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM Yamaha part numbers does the 18-3408 kit cross-reference to?\u003c\/strong\u003e The 18-3408 replaces Yamaha OEM numbers 6H4-W0078-00-A0 and 663-44311-02.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3408 water pump kit weigh?\u003c\/strong\u003e The Sierra 18-3408 water pump kit weighs 0.89 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the water pump housing made of?\u003c\/strong\u003e The housing in the 18-3408 kit is constructed of metal.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3408 a genuine replacement for factory Yamaha parts?\u003c\/strong\u003e The 18-3408 is a Sierra-manufactured replacement built to match the fit and function of the original Yamaha water pump housing and hardware it replaces, rather than a Yamaha-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3408 kit include mounting bolts?\u003c\/strong\u003e Yes, a bolt (O.E. Equivalent 97095-08045-00) is included with the Sierra 18-3408 water pump housing kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-3408 fit a Yamaha Pro50 outboard?\u003c\/strong\u003e Yes, the Sierra 18-3408 water pump kit is listed for the Yamaha Pro50 (1987) outboard engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat years of Yamaha 40 HP and 50 HP outboards does this kit fit?\u003c\/strong\u003e The 18-3408 fits Yamaha 40 HP and 50 HP outboards from 1984 through 1987.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-3408 water pump kit assembled?\u003c\/strong\u003e Sierra water pump kits, including the 18-3408, are assembled at Sierra's Illinois factory.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3408 water pump kit?\u003c\/strong\u003e The UPC for the Sierra 18-3408 water pump kit is 808282286989.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988147908827,"sku":"SIE-18-3408","price":63.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/sie-18-3408_lg_1__44830.1558141913.500.750.jpg?v=1785188874","url":"https:\/\/www.goodvibesmarina.com\/products\/water-pump-kit-with-housing-6h4-w0078-00-for-yamaha-40-50-pro50-hp-outboards-1984-1987-sierra-18-3408","provider":"Good Vibes Marina","version":"1.0","type":"link"}