{"product_id":"sierra-18-3475-water-pump-repair-kit-without-housing-for-yamaha-t9-9-2007-2017-replaces-69g-w0078-00","title":"Sierra 18-3475 Water Pump Repair Kit Without Housing for Yamaha T9.9 (2007-17), Replaces 69G-W0078-00","description":"\u003cp\u003eThe Sierra 18-3475 is a water pump repair kit built for the cooling system on Yamaha T9.9 outboards (2007-17). Supplied without a housing, this kit is designed for owners replacing worn internal wear components rather than the full pump body, making it a targeted fix when the housing itself is still in good condition. The kit replaces OEM number 69G-W0078-00 and is a direct match for the cooling system service parts on this application.\u003c\/p\u003e\u003cp\u003eInside the kit you get the two core wear items that typically fail first in a water pump: a cup insert (Sierra 18-3444, O.E. 63V-44322-00, quantity 1) and an impeller (Sierra 18-3040). The cup insert provides the wear surface the impeller vanes ride against, and replacing it alongside the impeller during a service interval helps the new impeller seal and perform correctly, since an old, worn cup insert can accelerate wear on a fresh impeller.\u003c\/p\u003e\u003cp\u003eThis repair kit is intended for routine cooling system maintenance and for restoring proper raw water flow after impeller wear, overheating, or a failed pump inspection. Because it ships without a housing, it is meant to pair with your existing water pump housing during a rebuild.\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 18-3475\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Repair Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing Included:\u003c\/strong\u003e No (Without Housing)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit Contents:\u003c\/strong\u003e Cup Insert (Sierra 18-3444, O.E. 63V-44322-00, Qty 1); Impeller (Sierra 18-3040)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces (OEM):\u003c\/strong\u003e 69G-W0078-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Yamaha T9.9 (2007-17)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.38 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Dimensions:\u003c\/strong\u003e 0.39 x 0.39 x 0.39 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282376833\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eYamaha T9.9 (2007-17)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e69G-W0078-00\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat does the Sierra 18-3475 water pump kit fit?\u003c\/strong\u003e The Sierra 18-3475 is designed for Yamaha T9.9 outboards (2007-17) cooling system service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3475 kit include the water pump housing?\u003c\/strong\u003e No. The Sierra 18-3475 is a repair kit without housing, meaning it supplies the internal wear parts for reuse with your existing water pump housing rather than a complete new housing assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part number does the Sierra 18-3475 replace?\u003c\/strong\u003e It replaces OEM number 69G-W0078-00, so it is a direct cross-reference for that Yamaha part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-3475 repair kit?\u003c\/strong\u003e The kit contains a cup insert (Sierra 18-3444, O.E. 63V-44322-00, quantity 1) and an impeller (Sierra 18-3040), the two wear components most commonly replaced during a water pump service.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3475 kit weigh?\u003c\/strong\u003e The Sierra 18-3475 water pump repair kit weighs 0.38 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy does the impeller need a new cup insert instead of just replacing the impeller alone?\u003c\/strong\u003e A worn cup insert provides a degraded wear surface for the impeller vanes, so replacing both parts together, as included in the 18-3475 kit, helps the new impeller seal and wear correctly from the start.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the cup insert in this kit an OEM part number?\u003c\/strong\u003e The cup insert included in the 18-3475 kit is Sierra part 18-3444, which corresponds to OEM number 63V-44322-00.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill this kit work if my water pump housing is damaged?\u003c\/strong\u003e The 18-3475 kit does not include a housing, so if your existing housing is cracked or worn beyond spec, it will need to be replaced or repaired separately in addition to installing this kit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the part number for the impeller in this kit?\u003c\/strong\u003e The impeller included in the Sierra 18-3475 kit is Sierra part 18-3040.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Sierra part?\u003c\/strong\u003e Yes, this is a Sierra-branded water pump repair kit, part number 18-3475.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the 18-3475 kit packaging?\u003c\/strong\u003e The Sierra 18-3475 kit measures 0.39 x 0.39 x 0.39 inches.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988149547227,"sku":"SIE-18-3475","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-3475__16594.1722514861.500.750.jpg?v=1785188678","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-3475-water-pump-repair-kit-without-housing-for-yamaha-t9-9-2007-2017-replaces-69g-w0078-00","provider":"Good Vibes Marina","version":"1.0","type":"link"}