{"product_id":"sierra-18-3055-water-pump-impeller-for-evinrude-johnson-outboards-replaces-omc-389589","title":"Sierra 18-3055 Water Pump Impeller, Replaces OMC 389589, for 50-60 HP Evinrude\/OMC Outboards","description":"\u003cp\u003eThe Sierra 18-3055 is a water pump impeller built to circulate raw water through the cooling system of compatible outboard motors, keeping the engine block and powerhead running at safe operating temperatures. As the wearing component inside the water pump housing, the impeller's flexible vanes draw water in and push it through the cooling passages every time the engine runs; over time these vanes flatten, crack, or shed material from heat and dry-running, which reduces flow and can lead to overheating. Replacing the impeller on the recommended service interval, or as soon as overheating or reduced water discharge is noticed, protects the powerhead from costly heat damage.\u003c\/p\u003e\u003cp\u003eThis impeller is made of metal-reinforced construction and is designed as a direct equivalent to OMC 389589, so it installs into the original water pump housing without modification. It is intended for 2 stroke Evinrude\/OMC outboard engines used in general boating activities such as fishing, water sports, and cruising. Fitment covers 50 HP model years 1979-1985, 55 HP model years 1979-1985, and 60 HP model years 1980-1985.\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 18-3055\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e Impeller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Equivalent Part Number:\u003c\/strong\u003e OMC 389589\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Type:\u003c\/strong\u003e 2 Stroke\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuel Type:\u003c\/strong\u003e Gasoline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Transom Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Metal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.17 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Length:\u003c\/strong\u003e 14.478 centimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Width:\u003c\/strong\u003e 7.874 centimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Height:\u003c\/strong\u003e 2.286 centimeters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1 count\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999315113\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e50 HP, model years 1979-1985\u003c\/li\u003e\n\u003cli\u003e55 HP, model years 1979-1985\u003c\/li\u003e\n\u003cli\u003e60 HP, model years 1980-1985\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 389589\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3055 impeller fit?\u003c\/strong\u003e It fits 50 HP outboards from model years 1979-1985, 55 HP outboards from model years 1979-1985, and 60 HP outboards from model years 1980-1985 on Evinrude\/OMC engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3055 an OEM part or an equivalent replacement?\u003c\/strong\u003e It is an aftermarket equivalent to OEM part OMC 389589, built to install into the original water pump housing without modification.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-3055 impeller made from?\u003c\/strong\u003e The impeller is constructed of metal with black-colored vanes, per Sierra's part specifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3055 impeller weigh?\u003c\/strong\u003e The Sierra 18-3055 weighs 0.17 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-3055?\u003c\/strong\u003e The Sierra 18-3055 ships in packaging measuring 14.478 centimeters long, 7.874 centimeters wide, and 2.286 centimeters high.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many impellers come in one Sierra 18-3055 package?\u003c\/strong\u003e One package of the Sierra 18-3055 contains a single impeller.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat engine type is the 18-3055 impeller designed for?\u003c\/strong\u003e This impeller is designed for 2 stroke, gasoline-fueled outboard engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3055 impeller work with transom-mounted outboards?\u003c\/strong\u003e Yes, the Sierra 18-3055 is designed for transom mount outboard applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would a boat owner need to replace the 18-3055 impeller?\u003c\/strong\u003e Water pump impellers like the Sierra 18-3055 wear out over time as their flexible vanes flatten or crack, reducing raw water flow and risking engine overheating, so periodic replacement is needed to keep the cooling system working properly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM number does the Sierra 18-3055 cross-reference to?\u003c\/strong\u003e The Sierra 18-3055 impeller cross-references to OMC 389589.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988137783515,"sku":"SIE-18-3055","price":23.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3055_lg__15586.1558123877.500.750.jpg?v=1785188005","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3055-water-pump-impeller-for-evinrude-johnson-outboards-replaces-omc-389589","provider":"Good Vibes Marina","version":"1.0","type":"link"}