{"product_id":"sierra-18-3104-1-water-pump-impeller-for-johnson-evinrude-outboards-replaces-omc-432941-437059-765350","title":"Sierra 18-3104-1 Water Pump Impeller for Johnson\/Evinrude 40 HP (1989-98) and 48 HP (1989-96) Outboards","description":"\u003cp\u003eThe Sierra 18-3104-1 is a rubber water pump impeller built for Johnson\/Evinrude (OMC\/BRP) outboard cooling systems. The impeller is the wear component inside the outboard's lower unit water pump that draws raw water in and forces it through the cooling passages to keep the engine block and exhaust running at safe operating temperatures. Made from black rubber, it is engineered to meet or exceed the specifications of the original equipment part it replaces, restoring proper coolant flow when the factory impeller has worn, glazed, or lost its vanes.\u003c\/p\u003e\u003cp\u003eThis impeller is a direct fit for Johnson\/Evinrude 40 HP outboards from 1989-98 and 48 HP outboards from 1989-96, and it cross-references to a number of common OEM and aftermarket part numbers, making it easy to identify against whatever number appears on your old impeller or parts diagram. Replacing the water pump impeller on schedule (or any time overheating, reduced water flow, or a weak telltale stream is noticed) helps prevent overheating damage to 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 18-3104-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Rubber\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Application:\u003c\/strong\u003e Johnson\/Evinrude (OMC\/BRP) outboard cooling system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 7.13 L x 1.25 H x 6 W (inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.26 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Taiwan, Province Of China\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJohnson\/Evinrude 40 HP, 1989-98\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude 48 HP, 1989-96\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 89790\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude Outboard 432941\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude Outboard 437059\u003c\/li\u003e\n\u003cli\u003eJohnson\/Evinrude Outboard 765350\u003c\/li\u003e\n\u003cli\u003eMallory 9-45204\u003c\/li\u003e\n\u003cli\u003eMallory 9-45204-10\u003c\/li\u003e\n\u003cli\u003eMallory 9-45211\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat outboards does the Sierra 18-3104-1 impeller fit?\u003c\/strong\u003e The Sierra 18-3104-1 fits Johnson\/Evinrude outboards rated 40 HP for model years 1989-98 and 48 HP for model years 1989-96.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3104-1 an OEM Johnson\/Evinrude part or an aftermarket replacement?\u003c\/strong\u003e It is a Sierra aftermarket impeller manufactured to meet or exceed the specifications of the original Johnson\/Evinrude equipment it replaces, rather than an OEM-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the Sierra 18-3104-1 cross-reference to?\u003c\/strong\u003e This impeller cross-references to GLM 89790, Johnson\/Evinrude Outboard numbers 432941, 437059, and 765350, and Mallory 9-45204, 9-45204-10, and 9-45211.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the impeller made from?\u003c\/strong\u003e The 18-3104-1 impeller is made from black rubber, the standard material for outboard water pump impeller vanes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3104-1 impeller weigh?\u003c\/strong\u003e The Sierra 18-3104-1 weighs 0.26 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-3104-1?\u003c\/strong\u003e The Sierra 18-3104-1 ships in packaging measuring 7.13 L x 1.25 H x 6 W inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know when to replace my outboard's water pump impeller?\u003c\/strong\u003e Signs that the impeller in your Johnson\/Evinrude water pump needs replacement include engine overheating, a weak or absent telltale (pee stream) at idle, or reduced raw water flow through the cooling system; the Sierra 18-3104-1 is sized for 40 HP (1989-98) and 48 HP (1989-96) applications showing these symptoms.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3104-1 include a full water pump repair kit?\u003c\/strong\u003e The 18-3104-1 is the impeller itself; it does not include the housing, wear plate, or gaskets that make up a complete water pump kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhere is the Sierra 18-3104-1 impeller manufactured?\u003c\/strong\u003e The 18-3104-1 impeller is manufactured in Taiwan, Province Of China.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the 18-3104-1 impeller?\u003c\/strong\u003e The 18-3104-1 is black.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-3104-1 work on any outboard brand?\u003c\/strong\u003e No, the 18-3104-1 is specifically designed for Johnson\/Evinrude (OMC\/BRP) outboard cooling systems in the 40 HP (1989-98) and 48 HP (1989-96) ranges.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988140339419,"sku":"SIE-18-3104-1","price":30.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3104_lg__74196.1558124442.500.750.jpg?v=1785188366","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3104-1-water-pump-impeller-for-johnson-evinrude-outboards-replaces-omc-432941-437059-765350","provider":"Good Vibes Marina","version":"1.0","type":"link"}