{"product_id":"sierra-yamaha-water-pump-repair-kit-18-3442-f115-lf115","title":"Sierra Yamaha Water Pump Repair Kit 18-3442 | F115 \/ LF115","description":"\u003ch2\u003eSierra Yamaha Water Pump Repair Kit 18-3442\u003c\/h2\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 18-3442 (Sierra)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Water Pump Repair Kit (housing not included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Yamaha F115 \/ LF115 4-stroke outboards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 808282291679\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eSierra 18-3442 is a water-pump repair kit for selected Yamaha F115 and LF115 4-stroke outboards. It supplies the primary internal wear components needed to rebuild the lower-unit water pump while reusing the existing pump housing — provided that housing is still smooth and undamaged. The kit cross-references to Yamaha OEM kit numbers 68V-W0078-00-00 and 68V-W0078-01-00.\u003c\/p\u003e\n\n\u003ch2\u003eKit Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWater pump impeller\u003c\/li\u003e\n\u003cli\u003eImpeller key\u003c\/li\u003e\n\u003cli\u003eWear plate\u003c\/li\u003e\n\u003cli\u003eInsert cup\u003c\/li\u003e\n\u003cli\u003eWater pump gasket\u003c\/li\u003e\n\u003cli\u003eO-rings\u003c\/li\u003e\n\u003cli\u003eMounting bolts and washers\u003c\/li\u003e\n\u003cli\u003eDowel \/ locating pin\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The main water pump housing is \u003cem\u003enot\u003c\/em\u003e included. If the existing housing is scored, melted, or distorted, a complete pump kit is required.\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Applications\u003c\/h2\u003e\n\u003cp\u003eVerified Yamaha 4-stroke outboard applications:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eYamaha F115 — 115 HP, 4-stroke, 2002 and newer\u003c\/li\u003e\n\u003cli\u003eYamaha LF115 — 115 HP, 4-stroke\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAlways confirm engine model, model year, and serial number before ordering. Yamaha revised the 68V-W0078 kit family over time — matching the existing OEM pump-kit number from your engine's parts diagram is the most reliable fitment method.\u003c\/p\u003e\n\n\u003ch2\u003eCross-Reference Part Numbers\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSierra:\u003c\/strong\u003e 18-3442\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSupplier\/Catalogue Reference:\u003c\/strong\u003e 47-3442\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha:\u003c\/strong\u003e 68V-W0078-00-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eYamaha:\u003c\/strong\u003e 68V-W0078-01-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuicksilver:\u003c\/strong\u003e 8M6012804\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMallory:\u003c\/strong\u003e 9-48611\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen to Service the Water Pump\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCooling water discharge weakens or becomes intermittent\u003c\/li\u003e\n\u003cli\u003eEngine temperature rises abnormally\u003c\/li\u003e\n\u003cli\u003eImpeller is cracked, stiff, or permanently set\u003c\/li\u003e\n\u003cli\u003ePump has ingested sand, silt, or debris\u003c\/li\u003e\n\u003cli\u003eGasket or O-rings show leakage or deterioration\u003c\/li\u003e\n\u003cli\u003eLower unit is already removed for scheduled cooling system maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eRemove the lower unit following Yamaha service procedures for the F115 \/ LF115\u003c\/li\u003e\n\u003cli\u003eInspect the existing pump housing carefully for grooves, distortion, or heat damage before reusing it\u003c\/li\u003e\n\u003cli\u003eReplace the impeller, wear plate, insert cup, O-rings, gasket, and all supplied hardware as a complete set\u003c\/li\u003e\n\u003cli\u003eLightly lubricate the impeller with a water-safe assembly lubricant before fitting\u003c\/li\u003e\n\u003cli\u003eRotate the driveshaft in its normal operating direction while lowering the pump housing over the impeller\u003c\/li\u003e\n\u003cli\u003eConfirm all impeller vanes fold in the correct rotational direction\u003c\/li\u003e\n\u003cli\u003eVerify correct water-tube engagement during gearcase reinstallation\u003c\/li\u003e\n\u003cli\u003eCheck cooling-water discharge after startup before returning to service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eParts Desk Insights\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBest use case:\u003c\/strong\u003e This kit is the right choice for scheduled water pump service on Yamaha F115 and LF115 outboards where the pump housing is in good condition. It covers all the internal wear parts in one package and is the direct OEM replacement for engines specifying 68V-W0078-00-00 or 68V-W0078-01-00. It's also the logical choice any time the lower unit is already off for other scheduled service.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon issue:\u003c\/strong\u003e The most frequent ordering mistake is selecting this kit when the pump housing also needs replacement. If the housing shows scoring, warping, or heat discoloration, this repair kit alone will not restore proper cooling performance — a complete pump kit including the housing is needed instead. Always inspect the housing before ordering. Also note that Yamaha revised this kit series over time, so confirming the OEM number rather than selecting by model year alone is the safest approach.\u003c\/p\u003e\n\u003cp\u003eBrowse all water pump service kits in our \u003ca href=\"\/collections\/impeller-service-kits\"\u003eImpeller Service Kits\u003c\/a\u003e collection, or shop \u003ca href=\"\/collections\/engine-parts-maintenance\"\u003eEngine Parts \u0026amp; Maintenance\u003c\/a\u003e for related cooling system components.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51156138262564,"sku":"47-3442","price":167.59,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/47-3442.jpg?v=1784926787","url":"https:\/\/marisolmarine.com\/products\/sierra-yamaha-water-pump-repair-kit-18-3442-f115-lf115","provider":"Marisol Marine Company","version":"1.0","type":"link"}