{"product_id":"sierra-18-3003-water-pump-impeller-for-omc-johnson-evinrude-outboards-replaces-oem-377178-775519","title":"Sierra 18-3003 Impeller, Replaces OMC 377178, for Evinrude Outboard Water Pumps","description":"\u003cp\u003eThe Sierra 18-3003 is a water pump impeller built for Evinrude outboard water pump applications. The impeller is the component inside your outboard's water pump housing that draws raw water in and circulates it through the engine's cooling system, so a worn or cracked impeller is one of the most common causes of overheating on outboard motors. This impeller is black in color and is supplied as a single unit (quantity of 1) for use when rebuilding or servicing your outboard's water pump.\u003c\/p\u003e\u003cp\u003eBecause impellers wear out from normal use, dry-running, or age-related hardening of the material, replacing the impeller at recommended service intervals or at the first sign of reduced water flow helps protect the engine from overheating damage. The Sierra 18-3003 is manufactured as a direct cross-reference replacement for the original equipment part, making it a straightforward like-for-like swap during a 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 18-3003\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Evinrude Outboard Water Pumps \u0026amp; Impellers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eItem Dimensions:\u003c\/strong\u003e 3 x 3 x 1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.09 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 impeller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999314994\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e OMC 377178\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eEvinrude outboard water pump applications\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eOMC 377178\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3003 impeller fit?\u003c\/strong\u003e The Sierra 18-3003 is designed for Evinrude outboard water pump applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the Sierra 18-3003 replace?\u003c\/strong\u003e It cross-references to OMC part number 377178, so it is a direct replacement for that original equipment impeller.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color is the Sierra 18-3003 impeller?\u003c\/strong\u003e It is black.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3003 impeller weigh?\u003c\/strong\u003e This impeller weighs 0.09 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the Sierra 18-3003?\u003c\/strong\u003e The impeller measures 3 x 3 x 1 inches.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many impellers come in the package?\u003c\/strong\u003e The Sierra 18-3003 is sold as a single impeller, quantity 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3003 a genuine Sierra part?\u003c\/strong\u003e Yes, it is manufactured and sold under the Sierra brand as part number 18-3003.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I need to replace the impeller in my outboard's water pump?\u003c\/strong\u003e A worn, cracked, or hardened impeller reduces raw water flow through the cooling system, which can lead to engine overheating; the Sierra 18-3003 impeller is used to restore proper water pump function.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3003 impeller?\u003c\/strong\u003e The UPC for the Sierra 18-3003 impeller is 030999314994.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan the Sierra 18-3003 be used as a direct swap for OMC 377178?\u003c\/strong\u003e Yes, Sierra 18-3003 is the cross-referenced replacement for OMC 377178.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988136571099,"sku":"SIE-18-3003","price":17.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3003_lg__82396.1558124950.500.750.jpg?v=1785188498","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3003-water-pump-impeller-for-omc-johnson-evinrude-outboards-replaces-oem-377178-775519","provider":"Good Vibes Marina","version":"1.0","type":"link"}