{"product_id":"water-pump-impeller-for-yamaha-2-stroke-outboards-replaces-oem-6h4-44352-02-00-sierra-18-3068","title":"Sierra Impeller 18-3068 for Yamaha Outboard Engines, Replaces 6H4-44352-00-00","description":"\u003cp\u003eThe Sierra Impeller, part number 18-3068, is a water pump impeller engineered for Yamaha outboard engines. It is designed as a direct equivalent to the Yamaha 6H4-44352-00-00 impeller, restoring proper raw-water circulation through the engine's cooling system. The water pump impeller is a critical wear item: as it spins inside the pump housing, its flexible vanes draw in raw water and push it through the cooling passages to keep the engine running at a safe operating temperature. Over time and use, impeller vanes lose their flexibility and set, crack, or shear, which reduces water flow and can lead to overheating if not replaced. Sierra Impeller 18-3068 is built to meet or exceed the specifications of the original equipment part it replaces, making it a straightforward drop-in replacement for routine water pump maintenance or a full water pump rebuild. It ships as a single impeller (package quantity of 1), so buyers doing a complete pump service should also plan for the corresponding pump case gasket, impeller plate, and impeller key as separate items if their rebuild calls for them.\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 18-3068\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Engine Water Pump Impeller\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 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 030999315205\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha outboard engines\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e6H4-44352-00-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3068 impeller fit?\u003c\/strong\u003e Sierra Impeller 18-3068 is built for Yamaha outboard engines as a replacement for the Yamaha water pump impeller.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does 18-3068 replace?\u003c\/strong\u003e It replaces Yamaha OEM part number 6H4-44352-00-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many impellers come in the package?\u003c\/strong\u003e One impeller ships per package; the package quantity for Sierra 18-3068 is 1.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3068 impeller genuine Yamaha or aftermarket?\u003c\/strong\u003e It is an aftermarket Sierra part manufactured to meet or exceed the specifications of the original Yamaha 6H4-44352-00-00 equipment part it replaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the impeller weigh?\u003c\/strong\u003e The Sierra 18-3068 impeller weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need any other parts to complete a water pump rebuild with this impeller?\u003c\/strong\u003e The 18-3068 listing covers only the impeller itself; a full water pump service on the same engine may also call for a pump case gasket, impeller plate, and impeller key, which are separate part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my impeller needs replacing?\u003c\/strong\u003e Signs of a worn impeller include reduced or no water flow from the engine's cooling stream, overheating, and cracked or missing vanes when the old impeller is inspected; Sierra 18-3068 is the replacement part for Yamaha engines showing these symptoms.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for this part?\u003c\/strong\u003e The Sierra 18-3068 impeller has UPC 030999315205.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan I use 18-3068 as a routine maintenance item?\u003c\/strong\u003e Yes, Sierra Impeller 18-3068 is intended for routine replacement of the Yamaha outboard water pump impeller as part of standard cooling system maintenance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the part number I should search for to find this impeller?\u003c\/strong\u003e Search Sierra part number 18-3068, which cross-references to Yamaha 6H4-44352-00-00.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988138701019,"sku":"SIE-18-3068","price":24.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3068_lg__19152.1558124774.500.750.jpg?v=1785188325","url":"https:\/\/www.goodvibesmarina.com\/products\/water-pump-impeller-for-yamaha-2-stroke-outboards-replaces-oem-6h4-44352-02-00-sierra-18-3068","provider":"Good Vibes Marina","version":"1.0","type":"link"}