{"product_id":"sierra-18-3043-water-pump-impeller-for-johnson-evinrude-outboard-replaces-omc-389642","title":"Sierra 18-3043 Impeller - Replaces OMC 389642, Fits 140\/150\/175 HP Evinrude\/Johnson Outboards","description":"\u003cp\u003eThe Sierra 18-3043 Impeller is a replacement water pump impeller engineered to meet or exceed original equipment quality for select Evinrude\/Johnson outboard motors. As the rotating component inside the outboard's water pump, the impeller draws raw water through the lower unit and pushes it up to cool the powerhead, making it a critical wear item for reliable engine operation. The impeller is constructed of a durable elastomer body bonded to a metal insert, with a black finish, and is built to the fit and tolerances of the original part it replaces.\u003c\/p\u003e\u003cp\u003eThis impeller is designed for 140 HP outboards from 1977-78, and 150 HP and 175 HP outboards from 1976-78. It directly interchanges with several original equipment and aftermarket cross-reference numbers, so it can be ordered using either the Sierra part number or a known OEM equivalent. Because water pump impellers wear over time and can fail without warning, causing overheating, replacing the 18-3043 on a regular service interval or at the first sign of reduced water flow helps protect the engine from heat-related damage.\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 18-3043\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Type:\u003c\/strong\u003e Impeller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Aluminum, Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999315052\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.35 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit Count:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e GLM 89680, Evinrude\/Johnson 389642, 777212, 385528, Mallory 9-45203, OMC 389642\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eEvinrude\/Johnson 140 HP outboards, 1977-78\u003c\/li\u003e\n\u003cli\u003eEvinrude\/Johnson 150 HP outboards, 1976-78\u003c\/li\u003e\n\u003cli\u003eEvinrude\/Johnson 175 HP outboards, 1976-78\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGLM 89680\u003c\/li\u003e\n\u003cli\u003eEvinrude\/Johnson 389642\u003c\/li\u003e\n\u003cli\u003e777212\u003c\/li\u003e\n\u003cli\u003e385528\u003c\/li\u003e\n\u003cli\u003eMallory 9-45203\u003c\/li\u003e\n\u003cli\u003eOMC 389642\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3043 impeller fit?\u003c\/strong\u003e The Sierra 18-3043 fits Evinrude\/Johnson 140 HP outboards from 1977-78, and 150 HP and 175 HP outboards from 1976-78.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-3043 interchangeable with OEM part numbers?\u003c\/strong\u003e Yes, the 18-3043 cross-references to OMC 389642, GLM 89680, Evinrude\/Johnson 389642, 777212, 385528, and Mallory 9-45203, so it can be ordered under any of those equivalent numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-3043 impeller made of?\u003c\/strong\u003e This impeller is made of aluminum and stainless steel components with a black finish, built to meet or exceed the quality of the original equipment part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3043 impeller weigh?\u003c\/strong\u003e The Sierra 18-3043 impeller weighs 0.35 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many impellers come in a package of the 18-3043?\u003c\/strong\u003e The 18-3043 is sold as a single impeller, with a unit count of 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3043 fit 1976 model year 140 HP outboards?\u003c\/strong\u003e No, the 18-3043 is designated for 140 HP outboards from 1977-78; the 1976 model year is not covered by this part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3043 an OEM or aftermarket part?\u003c\/strong\u003e The 18-3043 is a Sierra-branded aftermarket impeller manufactured to meet or exceed the quality of the original OMC 389642 equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3043 impeller?\u003c\/strong\u003e The UPC for the Sierra 18-3043 impeller is 030999315052.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does a water pump impeller need to be replaced?\u003c\/strong\u003e An impeller like the 18-3043 wears down over time from friction and heat, and a worn impeller reduces raw water flow to the engine, which can lead to overheating; replacing it at regular intervals or when water flow drops helps prevent engine damage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3043 fit both 150 HP and 175 HP outboards?\u003c\/strong\u003e Yes, the 18-3043 fits 150 HP and 175 HP Evinrude\/Johnson outboards from 1976-78, in addition to 140 HP models from 1977-78.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988137259227,"sku":"SIE-18-3043","price":41.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3043_lg__15047.1558123161.500.750.jpg?v=1785188627","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3043-water-pump-impeller-for-johnson-evinrude-outboard-replaces-omc-389642","provider":"Good Vibes Marina","version":"1.0","type":"link"}