{"title":"Yamaha F40 2-Stroke Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page covers Yamaha 2‑Stroke 40 HP outboard engines and helps you quickly find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Yamaha collection. Scroll to the bottom of this page to start browsing parts for this engine, and on the collection page use the “Filter \u0026amp; Sort” controls to narrow results by horsepower, year range, and part category\/section.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block; margin-top:8px; padding:10px 14px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Yamaha Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 40 HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eName\/serial plate: Look on the transom bracket or swivel bracket. Record the model code and the serial number.\u003c\/li\u003e\n    \u003cli\u003eModel code \u0026amp; suffix: Yamaha 2‑stroke 40 HP codes often include indicators for shaft length (S\/L\/X), control type (tiller vs. remote), and production year. The letter\/number suffix identifies minor revisions.\u003c\/li\u003e\n    \u003cli\u003ePlatform check: This page is for 2‑stroke models. If your cowling or paperwork shows an “F40” prefix, that typically denotes a 4‑stroke platform. Match parts to your model code to avoid mixing platforms.\u003c\/li\u003e\n    \u003cli\u003eQuick visual cues: 2‑stroke 40s are commonly carbureted. Many are inline‑3; earlier\/commercial variants may be inline‑2. Count carburetors and verify the code on the nameplate.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eYamaha 40 HP 2‑Stroke (Carbureted)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eTypically inline‑3 carbureted 2‑stroke; some earlier\/commercial variants are inline‑2. Remote or tiller options; common 20\" and 25\" shafts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e40 HP 2‑stroke family (various regional model codes such as utility and remote-control versions). Match parts by the exact model code on your nameplate.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eLight weight, strong hole‑shot, simple maintenance, broad parts availability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCooling and gearcase components may overlap with certain 40\/50 HP families in specific years. Always confirm by model\/serial and shaft length before ordering.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Yamaha 2‑stroke 40 HP outboards. Always follow the procedures and schedules in your official service manual.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCheck for water intrusion (milky oil). If present, service seals before refilling.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-lower-unit-seal-kits\"\u003eYamaha Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect 50 hrs; replace ~100 hrs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eVerify correct heat range and gap; replace if fouled or worn.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark plug\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eFuel filter \/ in‑line filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e50–100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eReplace more frequently if fuel contamination is suspected.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eEvery 2 seasons or ~200 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eReplace sooner for sandy\/muddy use or weak tell‑tale stream.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-water-pump-repair-kits\"\u003eYamaha Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eAnodes (zincs)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect 50 hrs; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eEssential for corrosion protection in brackish\/saltwater.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e2‑stroke oil injection \/ premix\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCheck at every service\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect tank screen\/lines and bleed procedure (injection). For premix, use TC‑W3 oil at the ratio specified in your manual.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\"\u003eYamaha Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003ePropeller \u0026amp; hardware\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect each outing\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eRemove prop to check for fishing line on the shaft; inspect cotter\/nut; grease splines.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-propellers\"\u003eYamaha Propellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eThermostat inspection\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eEvery 2 years\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eReplace if sticking or if overheat\/poor warm‑up is noted.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\"\u003eYamaha Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-service-maintenance-kits\"\u003eYamaha Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-water-pump-repair-kits\"\u003eYamaha Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System: \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical: \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eLower Unit \u0026amp; Seals: \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-lower-unit-seal-kits\"\u003eYamaha Lower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion: \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-propellers\"\u003eYamaha Propellers\u003c\/a\u003e \u0026amp; \u003ca href=\"https:\/\/seasierra.com\/collections\/propeller-guards\"\u003ePropeller Guards\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eWeak tell‑tale stream or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect intake screens for debris; verify water pump impeller condition; test thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eWater pump kit, intake screen, thermostat\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCheck prop damage or spun hub; replace fuel filter; inspect\/clean carbs; verify spark plug condition.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003ePropeller, fuel filter, spark plugs, carburetor service kit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eConfirm primer bulb firmness; check choke\/enrichment function; inspect for air leaks in fuel lines; evaluate plug fouling.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eSpark plugs, fuel lines\/hoses, fuel pump, carburetor service kit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eExcessive smoke (2‑stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eVerify correct oil ratio or injection setting; ensure thermostat isn’t stuck open (cold running).\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eThermostat, plugs, oil system components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGearcase noise or metallic paste in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eDrain and inspect gear oil; check for water intrusion and prop‑shaft fishing line; inspect seals and bearings.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLower unit seals, bearings, gear lube\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable across different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome service items are shared across multiple 40 HP 2‑stroke years, but cooling, ignition, and gearcase parts can vary by model code, shaft length, and control type. Always confirm using the model\/serial on your nameplate.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule of thumb, every two seasons or about 200 hours—sooner if you boat in sandy or silty water, or if the tell‑tale stream is weak or irregular.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eInspect at mid‑season and replace at least annually (or every 100 hours). Milky oil indicates water intrusion and the seals should be serviced before refilling.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003ePlease provide the full model code and serial number from the nameplate, shaft length (S\/L\/X), control type (tiller or remote), and photos of the part being replaced. This ensures we match the correct components.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; border-top:1px solid #e5e7eb;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year, and model? Browse the main Yamaha collection to get started.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block; margin-top:8px; padding:10px 14px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Yamaha Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#6b7280;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"water-pump-impeller-kit-fits-yamaha-40-60hp-replaces-63d-w0078-01-18-3415","title":"Water Pump Impeller Repair Kit with Housing – Fits Select Yamaha 40–60 HP 2-Stroke and 4-Stroke Outboards","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis complete \u003cstrong\u003ewater pump impeller repair kit with housing components\u003c\/strong\u003e is designed for routine lower-unit water pump service on select Yamaha 40, 50, and 60 HP outboard engines. The kit replaces worn impeller and pump-service components to help restore proper cooling-water circulation.\u003c\/p\u003e\n  \u003cp\u003eCatalog references associate this repair-kit style with Yamaha water pump references including \u003cstrong\u003e63D-W0078-00\u003c\/strong\u003e, \u003cstrong\u003e63D-W0078-01\u003c\/strong\u003e, and related suffix variations. Aftermarket cross-references include Sierra \u003cstrong\u003e18-3415\u003c\/strong\u003e and \u003cstrong\u003e18-3434\u003c\/strong\u003e, plus GLM \u003cstrong\u003e12276\u003c\/strong\u003e. These numbers are reference points only; always match the complete engine model, year, stroke, and existing pump components before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eInstalls in the lower unit or gearcase water pump assembly.\u003c\/li\u003e\n    \u003cli\u003eIncludes the impeller, housing cover, cartridge components, gaskets, seal damper, key, and replacement bolts listed below.\u003c\/li\u003e\n    \u003cli\u003eAftermarket replacement part; not manufactured or supplied by Yamaha.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eThe following are published OEM and aftermarket reference numbers associated with this repair-kit family. A number appearing in the same catalog family does not by itself confirm fitment for every engine listed.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eReference Number\u003c\/th\u003e\n\u003cth\u003eReference Type\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-00\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003eOEM reference format\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003ctd\u003eOEM reference format\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-02-00\u003c\/td\u003e\n\u003ctd\u003eCatalog cross-reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-03-00\u003c\/td\u003e\n\u003ctd\u003eCatalog cross-reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6H4-W0078-00\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6H4-W0078-01-00\u003c\/td\u003e\n\u003ctd\u003eOEM reference format\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6H4-W0078-A0-00\u003c\/td\u003e\n\u003ctd\u003eOEM reference format\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3415\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3434\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e12276\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eFitment depends on the complete Yamaha model designation and production year. The references below identify documented application groups, not a guarantee that every engine within a horsepower range uses the same pump assembly.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eApplication Group\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eDocumented Reference\u003c\/th\u003e\n\u003cth\u003eFitment Guidance\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eSelected 40-series models, including 40EJRV, 40ELRV, 40ESRV, 40MJHV, 40MLHV, 40MSHV, 40TLHV, 40TLRV and C40TLRV families\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003ctd\u003eModel and year must be matched exactly.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eSelected 50-series models, including 50EJRV, 50ELRV, 50TLHV and 50TLRV families\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003ctd\u003eModel and year must be matched exactly.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eSelected 40- and 50-series earlier models\u003c\/td\u003e\n\u003ctd\u003e40–50\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003eCatalog applications include selected 1995–1996 models; verify the original pump assembly.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eSelected F50LB, F50LB2, F60JB and F60LB applications\u003c\/td\u003e\n\u003ctd\u003e50–60\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-03-00\u003c\/td\u003e\n\u003ctd\u003eCatalog records document later model-year applications; verify the exact year and model suffix.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eSelected F40, F50 and F60 applications using the 63D\/related pump family\u003c\/td\u003e\n\u003ctd\u003e40–60\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e63D-W0078 series\u003c\/td\u003e\n\u003ctd\u003eDo not rely on horsepower alone; compare the full model number and pump components.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003eWater pump impeller repair kit with housing components\u003c\/dd\u003e\n    \u003cdt\u003eInstallation Location\u003c\/dt\u003e\n    \u003cdd\u003eLower unit \/ gearcase water pump assembly\u003c\/dd\u003e\n    \u003cdt\u003eApplication Range\u003c\/dt\u003e\n    \u003cdd\u003eSelect Yamaha 40–60 HP 2-stroke and 4-stroke outboards\u003c\/dd\u003e\n    \u003cdt\u003eProduct Status\u003c\/dt\u003e\n    \u003cdd\u003eAftermarket replacement; not an OEM Yamaha component\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Cartridge Insert (63D-44322-00-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Water Pump Impeller (6H3-44352-00-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Water Pump Housing Cover (63D-44312-00-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Cartridge Outer Plate (63D-44323-00-00)\u003c\/li\u003e\n    \u003cli\u003e1 x O-Ring (93210-59MG7-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Water Pump Gasket (63D-44316-00-00)\u003c\/li\u003e\n    \u003cli\u003e4 x Bolts with Washers (90119-08M15-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Water Seal Damper (663-44366-00-00)\u003c\/li\u003e\n    \u003cli\u003e1 x Woodruff Key (90280-03024-00)\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eComponent part numbers are included for identification and service-reference purposes. Confirm the physical configuration of the existing pump before installation.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and spark-plug leads, place the outboard in neutral, and secure the boat before beginning service.\u003c\/li\u003e\n    \u003cli\u003eSupport the lower unit and remove the gearcase according to the service manual for your specific engine.\u003c\/li\u003e\n    \u003cli\u003eRemove the water-pump housing and note the orientation of the old impeller, key, plate, gaskets, and seals.\u003c\/li\u003e\n    \u003cli\u003eClean the driveshaft, pump cavity, housing surfaces, and water passages. Remove all gasket residue.\u003c\/li\u003e\n    \u003cli\u003eInstall the gasket, cartridge or wear components, Woodruff key, impeller, seal, and housing in the correct order for your pump design.\u003c\/li\u003e\n    \u003cli\u003eTurn the driveshaft in the specified direction while installing the housing so the impeller vanes seat correctly. Do not force the housing over the vanes.\u003c\/li\u003e\n    \u003cli\u003eInstall the supplied bolts and washers and tighten them to the torque specification in the engine service manual.\u003c\/li\u003e\n    \u003cli\u003eReinstall the lower unit, reconnect all linkages and electrical connections, refill gearcase oil as required, and test the cooling-water tell-tale before operating the engine.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm this kit fits my engine?\u003c\/summary\u003e\n    \u003cp\u003eMatch the complete model designation, production year, stroke type, and existing water-pump reference. For example, a horsepower-only match is not sufficient because Yamaha used different pump configurations within similar horsepower ranges.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are signs of a worn water-pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eCommon symptoms include overheating, a weak or intermittent tell-tale stream, reduced cooling-water flow at idle, or visible damage to the impeller vanes. Stop operation if the engine overheats.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes the kit include the housing?\u003c\/summary\u003e\n    \u003cp\u003eYes. This listing includes the water-pump housing cover and the cartridge, plate, impeller, gasket, seal, key, and hardware listed in the package-contents section.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I install the kit myself?\u003c\/summary\u003e\n    \u003cp\u003eThis service requires mechanical experience and model-specific tools. Follow the service manual for the exact engine and use the manufacturer's torque specifications. If you are unsure, have a qualified marine technician perform the work.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM Yamaha part?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement kit. Yamaha, Sierra, and GLM names and part numbers are used only to identify compatible reference applications.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the full engine model, year, stroke, serial-number range where applicable, and original pump configuration before ordering.\u003c\/li\u003e\n    \u003cli\u003eDo not operate an outboard without an adequate water supply. Test the cooling-water stream before placing the engine under load.\u003c\/li\u003e\n    \u003cli\u003eImproper impeller orientation, missing gaskets, incorrect torque, or blocked water passages can cause overheating and severe engine damage.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement part, not an OEM component. Reference numbers are provided for comparison only.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMarine Maintenance Parts\u003c\/strong\u003e — Replacement components for routine outboard and lower-unit service.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReference-Based Fitment\u003c\/strong\u003e — Product information is organized around OEM and aftermarket reference numbers to help customers compare their original parts.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eService-Focused Support\u003c\/strong\u003e — When fitment is uncertain, provide the complete engine model and year before ordering.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723973103931,"sku":"23KY086","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23KY0861_2420c78d-4363-498e-9528-223b8cda584d.jpg?v=1763038891"},{"product_id":"water-pump-impeller-kit-fits-yamaha-40-50-hp-2-stroke-f40-f50-f60-4-stroke-replaces-yamaha-63d-w0078-01-00-sierra-18-3415-glm-12276","title":"Water Pump Impeller Kit with Pump Cover for Yamaha 40\/50 HP 2-Stroke and F40\/F50\/F60 4-Stroke – Replaces 63D-W0078-01-00","description":"\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis aftermarket \u003cstrong\u003ewater pump impeller kit with pump cover\u003c\/strong\u003e is designed to service the cooling system on selected Yamaha 40 and 50 HP 2-stroke outboards and F40, F50, and F60 4-stroke outboards. It replaces the Yamaha water pump repair kit reference \u003cstrong\u003e63D-W0078-01-00\u003c\/strong\u003e and is intended for direct replacement of the listed water pump service components.\u003c\/p\u003e\n  \u003cp\u003eCatalog references associate this kit with Yamaha 40\/50 HP 2-stroke applications, including selected C40 and P40 models, and selected F40, F50, P50, and F60 4-stroke applications. Always compare your complete engine model, year, and existing part number before ordering because fitment can vary by model configuration and production year.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eComplete water pump service kit for the listed Yamaha applications.\u003c\/li\u003e\n    \u003cli\u003eIncludes an impeller, pump cover, wear plate, insert cup, seals, gasket, key, bolts, washers, and O-ring.\u003c\/li\u003e\n    \u003cli\u003eAftermarket replacement; not an OEM Yamaha component.\u003c\/li\u003e\n    \u003cli\u003eProduced in an ISO 9002-certified facility according to the supplied product information.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse these verified reference numbers to compare the kit with your original part and other aftermarket catalogs. Reference numbers are provided for identification and interchange research only.\u003c\/p\u003e\n  \u003cstyle\u003e\n    .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n    table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n    table.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n    table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n    @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n  \u003c\/style\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Cross-Reference\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003eEarlier water pump repair kit reference found in catalog listings\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-02-00\u003c\/td\u003e\n\u003ctd\u003eCatalog cross-reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-03-00\u003c\/td\u003e\n\u003ctd\u003eLater catalog application reference; verify the complete engine model and year\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3415\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross-reference for the kit with pump cover\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3434\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross-reference listed for the related kit configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e12276\u003c\/td\u003e\n\u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eThe following applications are identified in the available Yamaha and aftermarket catalog references. Match the complete model designation and year before installation.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine and Model Compatibility\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel or Family\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eCatalog Years or Conditions\u003c\/th\u003e\n\u003cth\u003eOEM Reference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e40 and 50 HP\u003c\/td\u003e\n\u003ctd\u003e40–50\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 1995–2003 applications\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eC40, 3-cylinder\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 1997–2002 applications\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eP40\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998 application listed\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eC50\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 1999–2001 applications\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eP50\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1995–1996 applications\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF40 2.6L\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999 application listed\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF50\u003c\/td\u003e\n\u003ctd\u003e50\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 1995–2003 applications\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF60\u003c\/td\u003e\n\u003ctd\u003e60\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 2002–2003 applications\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eLater F50\/F60 variants\u003c\/td\u003e\n\u003ctd\u003e50–60\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSome later catalog records use 63D-W0078-03-00; verify the exact model and year\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-03-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Do not rely on horsepower alone. Yamaha model suffixes, shaft configuration, production year, and serial-number range can affect water pump fitment.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eWater pump impeller service kit with pump cover\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eSelected Yamaha 40\/50 HP 2-stroke and F40\/F50\/F60 4-stroke outboards\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement for the applicable water pump service components\u003c\/dd\u003e\n    \u003cdt\u003eProduct Status\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement, not OEM\u003c\/dd\u003e\n    \u003cdt\u003eQuality Information\u003c\/dt\u003e\n\u003cdd\u003eISO 9002-certified facility production according to the supplied product information\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Water pump insert cup, Yamaha reference 63D-44322-00-00\u003c\/li\u003e\n    \u003cli\u003e1 x Impeller, Yamaha reference 697-44352-00-00\u003c\/li\u003e\n    \u003cli\u003e1 x Water pump cover, Yamaha reference 63D-44312-00-00\u003c\/li\u003e\n    \u003cli\u003e1 x Wear plate, Yamaha reference 63D-44323-00-00\u003c\/li\u003e\n    \u003cli\u003e1 x O-ring, Yamaha reference 93210-59MG7-00\u003c\/li\u003e\n    \u003cli\u003e1 x Water pump gasket, Yamaha reference 63D-44316-00-00\u003c\/li\u003e\n    \u003cli\u003e1 x Bolt set containing 4 bolts, Yamaha reference 90119-08M15-00\u003c\/li\u003e\n    \u003cli\u003e4 x Bolt washers, Yamaha reference 90209-08M02-00\u003c\/li\u003e\n    \u003cli\u003e1 x Water seal, Yamaha reference 663-44366-00-00\u003c\/li\u003e\n    \u003cli\u003e1 x Impeller key, Yamaha reference 90280-03M03-00\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eThis package includes the pump cover listed above. It does not establish inclusion of a complete water pump housing; compare the contents with your original assembly before ordering.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and allow the engine to cool completely before beginning work.\u003c\/li\u003e\n    \u003cli\u003eDrain the lower-unit gear lubricant according to the manufacturer’s service procedure.\u003c\/li\u003e\n    \u003cli\u003eRemove the propeller and unbolt the lower unit from the upper engine casing.\u003c\/li\u003e\n    \u003cli\u003eLower the gearcase carefully and disconnect the speedometer tube if equipped.\u003c\/li\u003e\n    \u003cli\u003eRemove the old water pump cover and service components. Note the orientation of the original parts.\u003c\/li\u003e\n    \u003cli\u003eClean the pump mounting surfaces and inspect the driveshaft, water tube, keyway, and mating surfaces for wear or damage.\u003c\/li\u003e\n    \u003cli\u003eInstall the new gasket, wear plate, impeller key, impeller, insert cup, O-ring, water seal, and pump cover in the correct order.\u003c\/li\u003e\n    \u003cli\u003eRotate the driveshaft in the manufacturer-specified direction while fitting the impeller blades into the cover.\u003c\/li\u003e\n    \u003cli\u003eApply only the appropriate marine lubricant where specified and tighten the fasteners to the manufacturer’s torque specifications.\u003c\/li\u003e\n    \u003cli\u003eReinstall the lower unit, ensuring correct alignment of the water tube, shift shaft, and driveshaft.\u003c\/li\u003e\n    \u003cli\u003eRefill the gearcase with the correct lubricant, reinstall the propeller, and test the cooling-water flow before normal operation.\u003c\/li\u003e\n  \u003c\/ol\u003e\n  \u003cp\u003eFollow the service manual for your exact Yamaha model. Professional installation is recommended if you are not experienced with lower-unit or water-pump service.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if my water pump impeller needs replacing?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs include a weak or inconsistent tell-tale stream, rising engine temperature at idle or low speed, or an overheat alarm. Inspect the impeller and related cooling components whenever these symptoms occur.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat is the recommended replacement interval?\u003c\/summary\u003e\n    \u003cp\u003eInspect the impeller according to the maintenance schedule for your exact engine. Saltwater, sand, silt, extended storage, and heavy use can accelerate wear, so replacement intervals may need to be shortened.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy is my engine still overheating after installation?\u003c\/summary\u003e\n    \u003cp\u003eCheck the impeller orientation, key installation, pump-cover seal, water-tube alignment, intake screens, thermostat, and cooling passages. Also confirm that the replacement kit matches the complete engine model and year.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this kit include the complete water pump housing?\u003c\/summary\u003e\n    \u003cp\u003eThe listed package includes a water pump cover and the other service components shown in the box contents. A complete pump housing is not listed as an included component.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm fitment?\u003c\/summary\u003e\n    \u003cp\u003eMatch your engine’s complete model designation, year, and serial-number range with the compatibility information and compare the existing OEM reference. If any identification detail differs, confirm with a qualified marine-parts professional before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM Yamaha kit?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement kit intended to replace the applicable Yamaha water pump service components.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping speed and cost\u003c\/summary\u003e\n    \u003cp\u003eTypical transit is 5–15 days, and standard shipping is free where available. Expedited options, delivery estimates, and destination restrictions are shown at checkout.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty and returns\u003c\/summary\u003e\n    \u003cp\u003eThe product is covered by a 1-year warranty against manufacturing defects under normal use. Returns are accepted within the standard return window when the item is unused and in its original condition; consult the applicable store policy for details.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the full engine model, year, shaft configuration, and existing part number before purchase.\u003c\/li\u003e\n    \u003cli\u003eCompare the supplied components with your original water pump assembly. Do not install a component that differs in size, shape, or configuration.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement and is not manufactured by Yamaha.\u003c\/li\u003e\n    \u003cli\u003eUse the appropriate service manual and torque specifications for your engine.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safe and reliable operation.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection\u003e\n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts designed for dependable service in real-world operating conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Standard delivery is available to most regions, with estimated transit times shown at checkout.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Practical aftermarket replacement parts with clear application and package information.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723973136699,"sku":"23KY711","price":74.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23KY711_8_53b5bd91-f849-42a3-ac09-33179a8d8e12.jpg?v=1763038893"},{"product_id":"water-pump-impeller-kit-fits-yamaha-40-50-hp-2-stroke-f40-f50-f60-4-stroke-replaces-yamaha-63d-w0078-01-00","title":"Yamaha Water Pump Repair Kit with Housing – 40\/50 HP 2-Stroke and F40\/F50\/F60 4-Stroke","description":"\u003csection\u003e\n\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis aftermarket \u003cstrong\u003ewater pump repair kit with housing\u003c\/strong\u003e is designed for selected Yamaha 40 HP and 50 HP 2-stroke outboards, plus selected F40, F50, and F60 4-stroke models. It provides the main components needed to service the water pump and renew the impeller, wear surface, seals, gaskets, fasteners, and pump housing.\u003c\/p\u003e\n\u003cp\u003eThe kit is listed for Yamaha reference numbers \u003cstrong\u003e63D-44311-00-00\u003c\/strong\u003e, \u003cstrong\u003e63D-W0078-00-00\u003c\/strong\u003e, \u003cstrong\u003e63D-W0078-01-00\u003c\/strong\u003e, \u003cstrong\u003e63D-W0078-02-00\u003c\/strong\u003e, and \u003cstrong\u003e63D-W0078-03-00\u003c\/strong\u003e. Sierra catalog references \u003cstrong\u003e18-3415\u003c\/strong\u003e and \u003cstrong\u003e18-3434\u003c\/strong\u003e identify comparable water-pump service configurations; verify the exact engine model and year before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete water pump service kit with replacement housing.\u003c\/li\u003e\n  \u003cli\u003eIncludes an impeller, wear plate, insert cup, key, gaskets, seals, O-ring, cover, housing, washers, and fasteners.\u003c\/li\u003e\n  \u003cli\u003eSuitable for listed Yamaha gasoline outboards in both 2-stroke and 4-stroke configurations.\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement part; Yamaha and Sierra names and numbers are used only for identification and fitment reference.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eReference Numbers\u003c\/h2\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Reference numbers\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand or catalog\u003c\/th\u003e\n\u003cth\u003eReference number\u003c\/th\u003e\n\u003cth\u003eUse\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-44311-00-00\u003c\/td\u003e\n\u003ctd\u003eWater pump housing reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003eWater pump repair-kit reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-01-00\u003c\/td\u003e\n\u003ctd\u003eWater pump repair-kit reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-02-00\u003c\/td\u003e\n\u003ctd\u003eReference listed for this kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e63D-W0078-03-00\u003c\/td\u003e\n\u003ctd\u003eReference listed for this kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3415\u003c\/td\u003e\n\u003ctd\u003eComparable kit with housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3434\u003c\/td\u003e\n\u003ctd\u003eComparable repair-kit reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe company fitment records identify the following Yamaha engine families and year ranges. Model suffixes, shaft lengths, serial ranges, and regional variations may affect fitment, so compare the complete engine model designation and existing pump-part numbers before purchase.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Yamaha engine compatibility\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eEngine model or family\u003c\/th\u003e\n\u003cth\u003eHorsepower\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears listed\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e40, C40\u003c\/td\u003e\n\u003ctd\u003e40 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998–2003\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eP40, 50, C50, P50\u003c\/td\u003e\n\u003ctd\u003e40–50 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1997–2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF40\u003c\/td\u003e\n\u003ctd\u003e40 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1999\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF50\u003c\/td\u003e\n\u003ctd\u003e50 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1997–2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF60\u003c\/td\u003e\n\u003ctd\u003e60 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2002–2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct type\u003c\/dt\u003e\n\u003cdd\u003eWater pump repair kit with housing\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eSelected Yamaha outboard cooling-system service\u003c\/dd\u003e\n  \u003cdt\u003eEngine type\u003c\/dt\u003e\n\u003cdd\u003eSelected 2-stroke and 4-stroke gasoline outboards\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eReplacement water-pump service component\u003c\/dd\u003e\n  \u003cdt\u003eHousing included\u003c\/dt\u003e\n\u003cdd\u003eYes\u003c\/dd\u003e\n  \u003cdt\u003eManufacturer status\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement; not a Yamaha genuine part\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cp\u003eOne complete water pump service kit with housing, including the following components:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Water pump housing — reference 63D-44311-00-00\u003c\/li\u003e\n  \u003cli\u003e1 × Water pump housing cover — reference 63D-44312-00-00\u003c\/li\u003e\n  \u003cli\u003e1 × Impeller\u003c\/li\u003e\n  \u003cli\u003e1 × Wear plate\u003c\/li\u003e\n  \u003cli\u003e1 × Insert cup\u003c\/li\u003e\n  \u003cli\u003e1 × Impeller key\u003c\/li\u003e\n  \u003cli\u003e1 × Water pump case gasket\u003c\/li\u003e\n  \u003cli\u003e1 × Water seal\u003c\/li\u003e\n  \u003cli\u003e1 × O-ring\u003c\/li\u003e\n  \u003cli\u003e1 × Bolt set containing 4 bolts\u003c\/li\u003e\n  \u003cli\u003e4 × Bolt washers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eComponent appearance and component-brand markings may vary by production batch. Confirm the parts against your original water-pump assembly before installation.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and remove the engine cowling according to the engine service procedure.\u003c\/li\u003e\n  \u003cli\u003ePlace the outboard securely and remove the lower unit.\u003c\/li\u003e\n  \u003cli\u003eRemove the existing water-pump cover, impeller, key, plate, cup, housing, gaskets, seals, and related fasteners.\u003c\/li\u003e\n  \u003cli\u003eClean all mating surfaces and inspect the driveshaft, water tube, keyway, and surrounding components for wear or corrosion.\u003c\/li\u003e\n  \u003cli\u003eInstall the new gasket, plate, insert cup, impeller key, impeller, seals, O-ring, cover, housing, washers, and bolts in the correct service-manual order.\u003c\/li\u003e\n  \u003cli\u003eApply suitable lubricant to the impeller only where specified by the engine manufacturer, and orient the impeller vanes in the direction required during installation.\u003c\/li\u003e\n  \u003cli\u003eTorque fasteners to the Yamaha service-manual specification for the exact engine model.\u003c\/li\u003e\n  \u003cli\u003eReinstall the lower unit, reconnect the battery, and test the engine in an appropriate water source.\u003c\/li\u003e\n  \u003cli\u003eConfirm a steady tell-tale stream and verify that the engine does not overheat before returning it to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eProfessional installation is recommended. Always follow the service manual for the exact model, year, shaft configuration, and serial range.\u003c\/p\u003e\n\n\u003ch2\u003eMaintenance and Troubleshooting\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are common signs of a failing water-pump impeller?\u003c\/summary\u003e\u003cp\u003eA weak or intermittent tell-tale stream, overheating at idle or low speed, a temperature alarm, or damaged and brittle impeller vanes can indicate water-pump wear. Stop the engine if overheating occurs and inspect the cooling system.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow often should the impeller be serviced?\u003c\/summary\u003e\u003cp\u003eInspect the water pump during routine maintenance and replace the impeller according to the engine manufacturer’s service schedule. Frequent operation in sandy, silty, or corrosive water can require more frequent service.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this kit include the water-pump housing?\u003c\/summary\u003e\u003cp\u003eYes. The company product record identifies this product as a water pump service kit with housing. The kit includes the housing as well as the cover and other listed service components.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eCan I use only the impeller from this kit?\u003c\/summary\u003e\u003cp\u003eThe kit is supplied as a complete water-pump service kit. If only an impeller is needed, compare the impeller and keyway with the exact engine application before purchasing a separate component.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow do I confirm fitment?\u003c\/summary\u003e\u003cp\u003eCompare your complete Yamaha engine model, horsepower, stroke, year, shaft configuration, and existing water-pump reference with the information above. Do not rely on horsepower alone, because different engine families can use different pump assemblies.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs this an OEM Yamaha part?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement kit. Yamaha reference numbers are provided only to help identify the applicable water-pump assembly.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety and Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the complete engine model and year before ordering.\u003c\/li\u003e\n  \u003cli\u003eDo not operate an outboard that shows signs of overheating or has no tell-tale water flow.\u003c\/li\u003e\n  \u003cli\u003eUse the exact torque values, sealants, lubricants, and installation sequence specified in the engine service manual.\u003c\/li\u003e\n  \u003cli\u003eInspect the water tube, driveshaft, keyway, pump base, and mating surfaces while the lower unit is removed.\u003c\/li\u003e\n  \u003cli\u003eYamaha and Sierra trademarks and part numbers belong to their respective owners and are used for identification only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMarine Replacement Parts\u003c\/strong\u003e — Practical aftermarket components for routine outboard maintenance and repair.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitment-Focused Listings\u003c\/strong\u003e — Product information is organized around engine model, horsepower, stroke, and year conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eService-Ready Solutions\u003c\/strong\u003e — Kits combine the listed water-pump service components to simplify standard maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723973169467,"sku":"24KY155","price":45.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/24KY155_1_bc4ce3f6-ef03-4fb9-8e1c-8ad91e07684f.jpg?v=1763038895"}],"url":"https:\/\/seasierra.com\/collections\/yamaha-f40-2-stroke-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}