{"product_id":"sierra-18-3001-water-pump-impeller-for-evinrude-johnson-omc-outboards-replaces-omc-277181-434424","title":"Sierra 18-3001 Impeller, Replaces OMC 277181 and 434424","description":"\u003cp\u003eThe Sierra 18-3001 is a water pump impeller designed as a direct replacement for outboard cooling systems that originally used OMC 277181 or OMC 434424 impellers. The impeller is the core wear component inside a marine water pump housing: as it rotates, its flexible vanes draw raw water through the intake and push it through the engine's cooling passages to keep the powerhead running at a safe temperature. Because impeller vanes lose flexibility and can crack or shed material over time, especially after dry-running or extended storage, replacing this part on schedule is one of the most important preventive maintenance steps an outboard owner can perform. Neglecting a worn impeller is a common cause of overheating and expensive powerhead damage. The Sierra 18-3001 is sized and configured to install as a like-for-like swap for the original 277181\/434424 impeller, so it drops into the existing water pump housing without modification. It ships as a single impeller unit, ready to be installed during a routine water pump service or full water pump rebuild. Keeping a spare on board or in the shop is inexpensive insurance against a cooling system failure on the water.\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 18-3001\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Impeller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions:\u003c\/strong\u003e 6.81 inches L x 5.98 inches W x 0.55 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.09 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Quantity:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999237118\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN:\u003c\/strong\u003e 00030999237118\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Impeller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Limited Warranty\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eFits applications originally equipped with OMC impeller 277181 or 434424.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e277181\u003c\/li\u003e\n\u003cli\u003e434424\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3001 impeller replace?\u003c\/strong\u003e The Sierra 18-3001 is a direct replacement for OMC impeller numbers 277181 and 434424, so any application originally built around either of those part numbers accepts the 18-3001 as a drop-in swap.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3001 an OEM part or an aftermarket equivalent?\u003c\/strong\u003e It is an aftermarket impeller manufactured to match the fit and function of the original OMC 277181 and 434424 impellers, sold under the Sierra part number 18-3001.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many impellers come in one order of part number 18-3001?\u003c\/strong\u003e One order includes a single impeller; the package quantity for the 18-3001 is 1 unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the package dimensions of the 18-3001 impeller?\u003c\/strong\u003e The packaged 18-3001 measures 6.81 inches long by 5.98 inches wide by 0.55 inches high.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3001 impeller weigh?\u003c\/strong\u003e The 18-3001 impeller weighs 0.09 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhen should the 18-3001 impeller be replaced?\u003c\/strong\u003e Impellers like the 18-3001 should be replaced as part of routine water pump maintenance, since the rubber vanes lose flexibility and can crack over time, particularly after dry-running or long storage periods; a worn impeller is a leading cause of engine overheating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included when I purchase the 18-3001?\u003c\/strong\u003e The 18-3001 ships as the impeller component only, ready to install into the existing water pump housing.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3001 impeller come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-3001 impeller is covered by a limited warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use the 18-3001 impeller for a full water pump rebuild?\u003c\/strong\u003e Yes, the 18-3001 is commonly installed during a water pump service or rebuild wherever the original impeller carried OMC part number 277181 or 434424.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3001 impeller?\u003c\/strong\u003e The Sierra 18-3001 impeller carries UPC 030999237118 and GTIN 00030999237118.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988136341723,"sku":"SIE-18-3001","price":16.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3001_lg__59779.1558124825.500.750.jpg?v=1785188339","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3001-water-pump-impeller-for-evinrude-johnson-omc-outboards-replaces-omc-277181-434424","provider":"Good Vibes Marina","version":"1.0","type":"link"}