{"product_id":"sierra-18-3147-water-pump-kit-with-upper-housing-for-mercruiser-gen-ii-sterndrive-replaces-817275t4-817275k05","title":"Sierra 18-3147 Water Pump Kit, Replaces MerCruiser 817275T4, Fits Alpha One Generation II and Vazer","description":"\u003cp\u003eThe Sierra 18-3147 Water Pump Kit is a replacement raw water pump kit built for MerCruiser Alpha One Generation II and Vazer sterndrive units with serial number 0D494569 and above. This kit restores proper raw water circulation through the cooling system, which is essential for keeping the engine and exhaust components running at safe operating temperatures. The pump housing and related components are constructed of cast iron for durability in a marine environment, standing up to constant exposure to raw water, salt, and vibration.\u003c\/p\u003e\u003cp\u003eThis kit is designed as a direct equivalent to the original equipment water pump components used on covered MerCruiser Alpha One Generation II and Vazer drives, and it is built to meet or exceed the quality of the original part it replaces. Because raw water pump performance is fit-specific, boat owners should confirm their drive unit and serial number against the fitment listed here before ordering to make sure the 18-3147 is the correct kit for their MerCruiser Alpha One Generation II or Vazer drive.\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 18-3147\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.69 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e MerCruiser Alpha One Generation II and Vazer, serial number 0D494569 and above\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Cross Reference:\u003c\/strong\u003e Mallory 9-48315, MerCruiser 817275T4, MerCruiser 817275K05\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282112844\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 90 days\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eMerCruiser Alpha One Generation II and Vazer, serial number 0D494569 and above\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMallory 9-48315\u003c\/li\u003e\n\u003cli\u003eMerCruiser 817275T4\u003c\/li\u003e\n\u003cli\u003eMerCruiser 817275K05\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3147 Water Pump Kit fit?\u003c\/strong\u003e This kit fits MerCruiser Alpha One Generation II and Vazer sterndrive units with serial number 0D494569 and above. Confirm your drive's serial number before ordering since raw water pump fitment is serial-specific.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3147 the same as MerCruiser 817275T4?\u003c\/strong\u003e Yes, MerCruiser 817275T4 is a direct OEM cross reference for the Sierra 18-3147 Water Pump Kit, along with MerCruiser 817275K05 and Mallory 9-48315.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the Sierra 18-3147 Water Pump Kit made of?\u003c\/strong\u003e The 18-3147 Water Pump Kit is made of cast iron, chosen for its durability against constant raw water exposure and vibration in a marine drive.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the Sierra 18-3147 Water Pump Kit weigh?\u003c\/strong\u003e The 18-3147 Water Pump Kit weighs 1.69 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-3147 work on any MerCruiser Alpha One drive?\u003c\/strong\u003e No. The Sierra 18-3147 is specific to Alpha One Generation II and Vazer units with serial number 0D494569 and above; earlier serial ranges and other Alpha One configurations use different Sierra part numbers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs Sierra 18-3147 an aftermarket or genuine MerCruiser part?\u003c\/strong\u003e The 18-3147 is a Sierra-branded aftermarket water pump kit engineered to meet or exceed the quality of the original MerCruiser 817275T4 pump it replaces, not a MerCruiser-branded part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the Sierra 18-3147 cross reference to?\u003c\/strong\u003e The 18-3147 Water Pump Kit cross references to MerCruiser 817275T4, MerCruiser 817275K05, and Mallory 9-48315.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3147 kit come with a warranty?\u003c\/strong\u003e Yes, the Sierra 18-3147 Water Pump Kit carries a 90 day manufacturer warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3147 Water Pump Kit?\u003c\/strong\u003e The UPC for the Sierra 18-3147 Water Pump Kit is 808282112844.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does raw water pump fitment matter so much on MerCruiser drives?\u003c\/strong\u003e MerCruiser water pump components changed across serial number ranges and drive generations, so a kit like the 18-3147 that fits Alpha One Generation II and Vazer units at serial 0D494569 and above will not necessarily fit an earlier serial range or a different drive type.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988140667099,"sku":"SIE-18-3147","price":122.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/Untitled-1__63369.1753840678.500.750.jpg?v=1785188913","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3147-water-pump-kit-with-upper-housing-for-mercruiser-gen-ii-sterndrive-replaces-817275t4-817275k05","provider":"Good Vibes Marina","version":"1.0","type":"link"}