{"product_id":"sierra-18-3070-water-pump-impeller-for-yamaha-outboards-replaces-oem-688-44352-03-00","title":"Sierra 18-3070 Impeller, Replaces Yamaha 688-44352-03-00, for Yamaha Outboard Water Pumps","description":"\u003cp\u003eThe Sierra 18-3070 is a water pump impeller built for Yamaha outboard engines. The impeller is the rubber component inside the outboard's water pump housing that draws in raw water and circulates it through the engine to keep operating temperatures in check; a worn or cracked impeller is one of the most common causes of overheating in outboard motors. This impeller is designed to replace Yamaha Outboard part number 688-44352-03-00, so it is built to the fit, form, and function of the original equipment part it is intended to replace.\u003c\/p\u003e\u003cp\u003eEach package contains one impeller. It pairs with the Sierra 18-3371 Water Pump Kit with Housing and the Sierra 18-3370 Water Pump Repair Kit for a complete water pump service, whether you are doing a full housing replacement or a standard impeller-only rebuild. The impeller is made of aluminum. Because water pump impellers are fit specific to the outboard model and water pump housing they were engineered for, buyers should confirm the part number against their engine's existing impeller or service documentation before ordering to ensure proper fit.\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 18-3070\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.04 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e Impeller (1 per package)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e 688-44352-03-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Water Pump Kits:\u003c\/strong\u003e Sierra 18-3371 Water Pump Kit with Housing, Sierra 18-3370 Water Pump Repair Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999315229\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cp\u003eDesigned for use with Yamaha outboard engines. Fit is model specific, so confirm the part number against your engine before ordering.\u003c\/p\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e688-44352-03-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3070 impeller fit?\u003c\/strong\u003e The Sierra 18-3070 is designed for use with Yamaha outboard engines. Fit is model specific, so confirm this part number against your existing impeller or service documentation before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the 18-3070 replace?\u003c\/strong\u003e It replaces Yamaha Outboard part number 688-44352-03-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat material is the 18-3070 impeller made of?\u003c\/strong\u003e Aluminum. The impeller's hub is aluminum, with the flexible vanes designed to seal against the water pump housing to move raw water through the engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many impellers come in a package?\u003c\/strong\u003e One Sierra 18-3070 impeller is included per package.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3070 impeller weigh?\u003c\/strong\u003e It weighs 0.04 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat other parts do I need for a full water pump service?\u003c\/strong\u003e For a complete water pump rebuild, the 18-3070 impeller pairs with the Sierra 18-3371 Water Pump Kit with Housing or the Sierra 18-3370 Water Pump Repair Kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3070 a genuine Yamaha part or aftermarket?\u003c\/strong\u003e The 18-3070 is a Sierra-brand aftermarket impeller manufactured to replace Yamaha Outboard part number 688-44352-03-00; it is not a Yamaha OEM part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow do I know if my impeller needs replacing?\u003c\/strong\u003e Signs of a worn impeller in a Yamaha outboard water pump include reduced or no water flow at the telltale (pee hole), engine overheating, and cracked or torn vanes when the old impeller is inspected; the 18-3070 is sized to replace the original 688-44352-03-00 impeller in that pump.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included with the Sierra 18-3070?\u003c\/strong\u003e The package includes one impeller only; the water pump housing and gasket kit are sold separately as the Sierra 18-3371 or 18-3370 kits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3070 come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-3070 impeller carries a limited warranty.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988138668251,"sku":"SIE-18-3070","price":25.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-3070_lg__85222.1558124901.500.750.jpg?v=1785188447","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3070-water-pump-impeller-for-yamaha-outboards-replaces-oem-688-44352-03-00","provider":"Good Vibes Marina","version":"1.0","type":"link"}