{"product_id":"sierra-18-3368-water-pump-impeller-for-johnson-evinrude-outboard-replaces-omc-396809-6-fin-neoprene","title":"Sierra 18-3368 Water Pump Impeller for Johnson\/Evinrude 50 HP Outboard, 1986-88 (Replaces OMC 396809)","description":"\u003cp\u003eThe Sierra 18-3368 is a neoprene water pump impeller built for Johnson\/Evinrude 50 HP outboard motors from the 1986-88 model years. As the impeller wears, it loses the flexibility needed to draw and push cooling water through the powerhead, leading to overheating and potential engine damage; replacing it on schedule keeps raw water circulating properly and protects the block, exhaust, and cylinder head from heat-related failure.\u003c\/p\u003e\u003cp\u003eThis impeller uses a 6-fin neoprene design engineered to meet or exceed the specifications of the original equipment part it replaces. Neoprene is the standard material for outboard water pump impellers because it holds its shape and seal under repeated flexing while running dry-start conditions common to marine engines. The impeller is finished in white and is sold as a single component, so it pairs with the water pump plate, housing, or full repair kit already on the engine rather than including those parts.\u003c\/p\u003e\u003cp\u003eSierra manufactures replacement parts for OEM engine builders and boat manufacturers, and the 18-3368 is cross-referenced to the OMC\/Evinrude\/Johnson part numbers used on this water pump application, making it a straightforward like-for-like swap during a routine water pump service.\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 18-3368\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Neoprene\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Fins:\u003c\/strong\u003e 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.15 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Fitment:\u003c\/strong\u003e Johnson\/Evinrude 50 HP outboard, 1986-88\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999753502\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eJohnson\/Evinrude 50 HP outboard, 1986-88\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 89780\u003c\/li\u003e\n\u003cli\u003eEvinrude\/Johnson 39809\u003c\/li\u003e\n\u003cli\u003e777214\u003c\/li\u003e\n\u003cli\u003eMallory 9-45208\u003c\/li\u003e\n\u003cli\u003eOMC 396809\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engine does the Sierra 18-3368 impeller fit?\u003c\/strong\u003e The Sierra 18-3368 is designed for Johnson\/Evinrude 50 HP outboard motors from the 1986-88 model years.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3368 the same as OMC 396809?\u003c\/strong\u003e Yes, OMC 396809 is a listed OEM equivalent to the Sierra 18-3368 impeller, so it fits the same 50 HP Johnson\/Evinrude water pump application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the impeller made from?\u003c\/strong\u003e It is molded from neoprene, the standard flexible material used in outboard water pump impellers to withstand repeated flexing and dry-start conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many fins does the 18-3368 impeller have?\u003c\/strong\u003e This impeller has 6 fins, matching the original design used in the Johnson\/Evinrude 50 HP water pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-3368 impeller?\u003c\/strong\u003e The 18-3368 is white, which is the standard color for this neoprene impeller.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part?\u003c\/strong\u003e Yes, part number 18-3368 is manufactured by Sierra and built to meet or exceed the original equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3368 include the water pump housing or gasket?\u003c\/strong\u003e No, the 18-3368 is the impeller only; the housing, plate, and gasket are separate components sold individually or as part of a full pump kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM and aftermarket numbers cross-reference to this impeller?\u003c\/strong\u003e The Sierra 18-3368 cross-references to GLM 89780, Evinrude\/Johnson 39809, 777214, Mallory 9-45208, and OMC 396809.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3368 impeller weigh?\u003c\/strong\u003e The Sierra 18-3368 impeller weighs 0.15 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if I need just the impeller or a full repair kit?\u003c\/strong\u003e If only the rubber impeller has worn or lost its fins, the 18-3368 alone is sufficient; if the housing, plate, or seals are also damaged, a complete water pump repair kit for the 1986-88 50 HP Johnson\/Evinrude is the better choice.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I order the 18-3368?\u003c\/strong\u003e You receive one Sierra 18-3368 neoprene impeller; no housing, plate, gasket, or hardware is included.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988144828635,"sku":"SIE-18-3368","price":23.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3368_lg__96548.1558126407.500.750.jpg?v=1785188579","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3368-water-pump-impeller-for-johnson-evinrude-outboard-replaces-omc-396809-6-fin-neoprene","provider":"Good Vibes Marina","version":"1.0","type":"link"}