{"product_id":"water-pump-repair-kit-without-housing-for-yamaha-f225-f250-f300-f350-replaces-6ce-w0078-01-sierra-18-3470","title":"Sierra Water Pump Repair Kit 18-3470 for Yamaha F225A\/F225B\/F250A\/F250B (4.2L) Outboards","description":"\u003cp\u003eThe Sierra 18-3470 is a water pump repair kit engineered for Yamaha 4.2L four-stroke outboard engines. Marine water pumps rely on impellers, plates, and seals to circulate raw water through the cooling system, and these wear components degrade over time from heat, friction, and mineral buildup, eventually leading to overheating or reduced coolant flow. This kit supplies the wear parts needed to service the water pump on covered Yamaha outboards without requiring replacement of the pump housing itself, making it a cost-effective option when the housing is still in serviceable condition.\u003c\/p\u003e\u003cp\u003eThis is a kit-without-housing configuration, meaning it is intended for pumps where the housing does not need to be replaced. It is designed specifically for the Yamaha F225A\/LF225A, F225B\/LF225B, F250A\/LF250A, and F250B\/LF250B outboards equipped with the 4.2L engine, across the model years listed below. Using the correct kit for your specific engine and year range helps ensure proper fit and reliable cooling performance after installation.\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 18-3470\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\u003eKit Configuration:\u003c\/strong\u003e Kit without Housing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Compatibility:\u003c\/strong\u003e Yamaha 4.2L four-stroke outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282374358\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1 pound\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYamaha F225A\/LF225A (4.2L), 2010-17\u003c\/li\u003e\n\u003cli\u003eYamaha F225B\/LF225B (4.2L), 2016-17\u003c\/li\u003e\n\u003cli\u003eYamaha F250A\/LF250A (4.2L), 2014-17\u003c\/li\u003e\n\u003cli\u003eYamaha F250B\/LF250B (4.2L), 2016-17\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-3470 water pump kit fit?\u003c\/strong\u003e The Sierra 18-3470 fits Yamaha F225A\/LF225A (2010-17), F225B\/LF225B (2016-17), F250A\/LF250A (2014-17), and F250B\/LF250B (2016-17) outboards, all with the 4.2L engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-3470 kit include a new water pump housing?\u003c\/strong\u003e No, the Sierra 18-3470 is a kit-without-housing configuration, meaning it is intended for water pumps where the existing housing is still serviceable and does not need to be replaced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-3470 water pump kit weigh?\u003c\/strong\u003e The Sierra 18-3470 weighs 1 pound.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the UPC for the Sierra 18-3470 water pump kit?\u003c\/strong\u003e The UPC for the Sierra 18-3470 water pump repair kit is 808282374358.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-3470 kit work on a 3.3L Yamaha F225 or F250?\u003c\/strong\u003e No. The 18-3470 kit is specific to the 4.2L engine versions of the F225A\/B and F250A\/B; the 3.3L versions of these Yamaha outboards use a different Sierra kit part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs there a version of this kit that includes the housing?\u003c\/strong\u003e Yes, Sierra offers a corresponding kit-with-housing option for the same 4.2L Yamaha engines, which is a separate part number from the 18-3470 kit-without-housing version.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the Sierra 18-3470 a genuine Yamaha part or an aftermarket replacement?\u003c\/strong\u003e The 18-3470 is a Sierra-branded water pump repair kit manufactured for the specified Yamaha 4.2L outboard applications, not an OEM Yamaha part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat year range does the F225B\/LF225B application cover with the 18-3470 kit?\u003c\/strong\u003e For the F225B\/LF225B (4.2L), the Sierra 18-3470 kit covers model years 2016-17.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat year range does the F250A\/LF250A application cover with the 18-3470 kit?\u003c\/strong\u003e For the F250A\/LF250A (4.2L), the Sierra 18-3470 kit covers model years 2014-17.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy would I choose a kit without housing instead of a full housing kit?\u003c\/strong\u003e A kit-without-housing option like the Sierra 18-3470 is typically chosen when the existing water pump housing is not damaged or worn, allowing you to service only the wear components rather than replacing the entire pump housing assembly.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988149416155,"sku":"SIE-18-3470","price":180.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/18-3470__70074.1722498341.500.750.jpg?v=1785329192","url":"https:\/\/www.goodvibesmarina.com\/products\/water-pump-repair-kit-without-housing-for-yamaha-f225-f250-f300-f350-replaces-6ce-w0078-01-sierra-18-3470","provider":"Good Vibes Marina","version":"1.0","type":"link"}