{"title":"Yamaha 4-Stroke 9.9-20HP Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"max-width: 900px; margin: 0 auto; padding: 12px 0;\"\u003e\n  \u003cp\u003eThis page supports Yamaha 4‑Stroke 9.9–20 HP outboard engines. Use it to find compatible parts and practical service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse our main Yamaha outboard 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.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block;padding:10px 16px;background:#0a4ea1;color:#fff;text-decoration:none;border-radius:4px;\"\u003eBrowse All Yamaha Parts\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"max-width: 900px; margin: 0 auto;\"\u003e\n  \u003ch2\u003eHow to Identify Your 9.9–20 HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate location: Look on the port-side clamp\/swivel bracket for the model\/serial plate; a sticker may also be on the transom bracket.\u003c\/li\u003e\n    \u003cli\u003eReading the code: Yamaha 4‑stroke models start with “F” (e.g., F9.9, F15, F20). Suffix letters indicate shaft length (S\/L\/X), start (M\/E), tiller\/remote, and other options.\u003c\/li\u003e\n    \u003cli\u003ePlatform clues: Many F9.9\/F15 and early F20 units are twin‑cylinder carbureted; later F20 versions may be EFI. Fuel system type affects filter, pump, and sensor compatibility.\u003c\/li\u003e\n    \u003cli\u003eProp\/hub note: Several 9.9–20 HP Yamaha models use an 8‑spline prop hub—verify spline count before ordering propellers and hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"max-width: 900px; margin: 0 auto;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003eF9.9 \/ F15 (approx. 2003–2007)\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 #ddd;padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInline‑2 SOHC, carbureted 4‑stroke; manual or electric start; tiller or remote.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eF9.9 (short\/long shaft), F15 (short\/long, tiller\/remote).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eLightweight, quiet, and fuel‑efficient with widely available service parts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eMany service items interchange with sibling models. Prop hubs are commonly 8‑spline—confirm before purchasing props\/hardware.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eF20 (early carb; later EFI variants)\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 #ddd;padding:6px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInline‑2 4‑stroke; early units carbureted; some later markets received EFI. High‑thrust (FT) variants exist.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eF20 (S\/L shafts, manual\/electric), FT20 high‑thrust options.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eStronger mid‑range torque and good charging output for small‑boat accessories.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eFuel system parts differ between carb and EFI. Prop hubs often 8‑spline—verify on your prop shaft 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=\"max-width: 900px; margin: 0 auto;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for small Yamaha 4‑stroke outboards; always follow your engine’s 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 #ddd;padding:6px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eUse marine‑grade FC‑W oil; change more often for heavy trolling or harsh conditions.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eCheck for water contamination (milky oil). Replace seals if intrusion is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\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:6px;border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInspect 100 hrs; replace 200 hrs (or annually if fouled)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eConfirm heat range and gap for your specific model\/year.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\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:6px;border-bottom:1px solid #f0f0f0;\"\u003eFuel filter \/ water separator (inline)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eReplace sooner with ethanol or contaminated fuel issues.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\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:6px;border-bottom:1px solid #f0f0f0;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInspect annually; replace every 2 seasons (or ~200 hrs)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eShorter intervals for sandy\/silty or shallow‑water use.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\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:6px;border-bottom:1px solid #f0f0f0;\"\u003eAnodes (internal \u0026amp; external)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInspect each season; replace when ~50% depleted\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eMatch anode material (aluminum\/zinc\/magnesium) to water type.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\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:6px;border-bottom:1px solid #f0f0f0;\"\u003eThermostat\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInspect every 2 years\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eReplace if stuck or corroded; critical for correct operating temp.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\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:6px;\"\u003eValve clearance check\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eEvery 200 hours or 2 years\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eAdjust as needed; misadjustment can cause hard starting or noise.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\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=\"max-width: 900px; margin: 0 auto;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service \u0026amp; Kits – \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\u003eGearcase \u0026amp; Sealing – \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\u003eCorrosion Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropellers \u0026amp; Hardware – \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-propellers\"\u003eYamaha Propellers\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"max-width: 900px; margin: 0 auto;\"\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 #ddd;padding:6px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;padding:6px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eWeak tell‑tale or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eInspect intake screens for debris, verify impeller condition, test thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eWater pump kit, thermostat, intake screen\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eCheck prop damage\/slip, replace clogged fuel filter, inspect spark plugs; verify throttle\/carb sync on carb models.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003ePropeller, fuel filter, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eDrain stale fuel, confirm choke\/enrichment, check for vacuum leaks, verify plug gap and idle speed.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs, fuel filter, carburetor components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eGearcase noise or milky gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eCheck oil level\/color, inspect for fishing line at prop shaft, pressure\/vac test for leaking seals.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;border-bottom:1px solid #f0f0f0;\"\u003eLower unit seal kit, bearings, gear oil\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eBattery not charging\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eVerify rectifier\/regulator connectors and grounds; check fuses and charging output at idle and cruise rpm.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eRectifier\/regulator, wiring connectors, fuse\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=\"max-width: 900px; margin: 0 auto;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable across F9.9, F15, and F20 models?\u003c\/summary\u003e\n    \u003cp\u003eMany routine service items (plugs, anodes, some filters, impellers) are shared, but carbureted vs. EFI F20 fuel parts and certain gaskets\/sensors can differ. Always verify by model code, serial, and fuel system type.\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\u003eInspect annually and replace every two seasons (or sooner for sandy\/shallow use). Replace immediately if water flow weakens, the stream is intermittent, or the engine overheats.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eAt least every 100 hours or annually. If oil appears milky or contaminated, service seals and refill with fresh gear oil before further operation.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the exact model code and serial number, shaft length (S\/L\/X), start\/control type (manual\/electric; tiller\/remote), fuel system (carb or EFI for F20), and prop spline count.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"max-width: 900px; margin: 0 auto; padding: 12px 0;\"\u003e\n  \u003cp\u003eReady to find parts? Browse the main Yamaha outboard collection and filter by horsepower, year, and model to locate the right components for your engine.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block;padding:10px 16px;background:#0a4ea1;color:#fff;text-decoration:none;border-radius:4px;\"\u003eShop Yamaha Outboard Parts\u003c\/a\u003e\u003c\/p\u003e\n  \u003cp style=\"font-size:0.95em;color:#444;\"\u003eIf you’re unsure about your model, send us a clear photo of the nameplate and the part you need—we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"water-pump-impeller-kit-fits-yamaha-15-20-hp-4-stroke-replaces-6ah-w0078-00-00-18-3479","title":"Water Pump Service Kit with Housing – Fits Yamaha F15C and F20 4-Stroke Outboards (Replaces 6AH-W0078-00-00, 6AH-W0078-01-00, 6AH-W0078-02-00, Sierra 18-3479)","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  details { border:1px solid #e5e7eb; border-radius:4px; margin-bottom:8px; }\n  details summary { padding:12px; font-weight:600; cursor:pointer; }\n  details p { padding:0 12px 12px; margin:0; }\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 \u003cstrong\u003eWater Pump Service Kit with Housing\u003c\/strong\u003e is an aftermarket replacement for Yamaha F15C and F20 4-stroke outboard water pump assemblies. It is intended for complete water pump service, helping restore proper cooling-water circulation when the existing impeller, housing, wear surfaces, seals, or related service parts are worn.\u003c\/p\u003e\n\u003cp\u003eThe kit replaces the Yamaha references \u003cstrong\u003e6AH-W0078-00-00\u003c\/strong\u003e, \u003cstrong\u003e6AH-W0078-01-00\u003c\/strong\u003e, and \u003cstrong\u003e6AH-W0078-02-00\u003c\/strong\u003e. Sierra Marine reference \u003cstrong\u003e18-3479\u003c\/strong\u003e is included as an aftermarket interchange reference. These numbers identify the application or replacement reference; they do not indicate that this product is manufactured by Yamaha or Sierra Marine.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWater pump service kit supplied with the pump housing.\u003c\/li\u003e\n  \u003cli\u003eDesigned for Yamaha F15C and F20 4-stroke outboards.\u003c\/li\u003e\n  \u003cli\u003eProvides the principal wear and sealing components needed for a water pump service.\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement for the listed Yamaha and Sierra reference numbers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number References\u003c\/h2\u003e\n\u003cp\u003eUse the references below together with your engine model and the original water pump assembly to confirm fitment before ordering.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand or source\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\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003eOEM replacement reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-01-00\u003c\/td\u003e\n\u003ctd\u003eOEM replacement reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-02-00\u003c\/td\u003e\n\u003ctd\u003eOEM replacement reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003ctd\u003e18-3479\u003c\/td\u003e\n\u003ctd\u003eAftermarket interchange 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\u003eThis product is listed for \u003cstrong\u003eYamaha F15C and F20 4-stroke outboards\u003c\/strong\u003e. Model suffixes, shaft versions, production years, and serial-number ranges can affect water pump fitment. Confirm the complete model designation and compare the existing pump assembly or reference number before installation.\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\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated horsepower\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eFitment status\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF15C\u003c\/td\u003e\n\u003ctd\u003e15 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eListed application\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF20\u003c\/td\u003e\n\u003ctd\u003e20 HP\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eListed application\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eDo not use this listing as confirmation for other Yamaha models, F15 or F20 variants with a different suffix, or other engine brands unless the complete model and original part reference have been independently matched.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct type\u003c\/dt\u003e\n  \u003cdd\u003eWater pump service kit with housing\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eYamaha F15C and F20 4-stroke outboards\u003c\/dd\u003e\n  \u003cdt\u003eReplacement type\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement\u003c\/dd\u003e\n  \u003cdt\u003eHousing included\u003c\/dt\u003e\n  \u003cdd\u003eYes\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eDirect replacement when the engine model and original water pump reference match\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cp\u003eThis listing includes a water pump service kit with the pump housing and the associated service components supplied for the listed application. Component appearance and packaging may vary by production batch. Confirm the supplied parts against the existing assembly before beginning installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWater pump housing\u003c\/li\u003e\n  \u003cli\u003eWater pump impeller\u003c\/li\u003e\n  \u003cli\u003eWear and sealing components required for the service kit application\u003c\/li\u003e\n  \u003cli\u003eRelated installation hardware supplied with the kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eReview the engine service information and verify the complete model designation before disassembly.\u003c\/li\u003e\n  \u003cli\u003ePlace the outboard in neutral, disconnect the battery where applicable, and support the lower unit safely.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit according to the manufacturer's procedure. Keep track of the orientation of the water tube, driveshaft, shift shaft, and pump components.\u003c\/li\u003e\n  \u003cli\u003eRemove the old water pump housing, impeller, wear components, seals, and related service parts.\u003c\/li\u003e\n  \u003cli\u003eClean the mating surfaces and inspect the driveshaft, keyway, water tube, and surrounding components for damage or corrosion.\u003c\/li\u003e\n  \u003cli\u003eInstall the new service components in the correct order. Ensure the impeller key is seated correctly and the impeller is oriented for the direction of shaft rotation.\u003c\/li\u003e\n  \u003cli\u003eReinstall the housing and related hardware using the manufacturer's specified tightening sequence and torque values.\u003c\/li\u003e\n  \u003cli\u003eReinstall the lower unit, carefully aligning the driveshaft, shift shaft, and water tube.\u003c\/li\u003e\n  \u003cli\u003eRun the engine only in water or with an appropriate flushing device. Confirm a steady tell-tale stream and check for overheating or leakage.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eUse the manufacturer's service manual for model-specific torque values, disassembly procedures, and safety requirements. Professional installation is recommended if the lower unit or cooling system has not previously been serviced.\u003c\/p\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat symptoms indicate a worn water pump?\u003c\/summary\u003e\n  \u003cp\u003eCommon symptoms include a weak or intermittent tell-tale stream, overheating at idle or low speed, a temperature warning, or visible damage to the impeller and housing. A blocked tell-tale passage or water tube can produce similar symptoms, so inspect the complete cooling-water path.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this listing include the water pump housing?\u003c\/summary\u003e\n  \u003cp\u003eYes. The company product record identifies this application as a water pump service kit with housing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhich engines is this kit listed for?\u003c\/summary\u003e\n  \u003cp\u003eIt is listed for Yamaha F15C and F20 4-stroke outboards. Confirm the full model suffix and compare the original pump reference before ordering because similar horsepower models may use different assemblies.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eAre the Yamaha numbers shown on this page OEM parts?\u003c\/summary\u003e\n  \u003cp\u003eThe Yamaha numbers are OEM replacement references used to identify the application. This product is an aftermarket replacement and is not a genuine Yamaha component.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs Sierra 18-3479 included as a reference?\u003c\/summary\u003e\n  \u003cp\u003eYes. Sierra Marine 18-3479 is listed as an aftermarket interchange reference for this water pump service kit application. Always verify the complete engine model and original assembly before installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eCan I replace only the impeller?\u003c\/summary\u003e\n  \u003cp\u003eA qualified technician may replace only the impeller when the housing and other wear surfaces remain serviceable. If the housing, seals, plates, or related components show wear, replacing the complete service kit can help restore proper pump performance.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the complete engine model, horsepower, stroke, suffix, and original water pump reference before purchase.\u003c\/li\u003e\n  \u003cli\u003eDo not rely on horsepower alone for fitment; similar models may use different water pump assemblies.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM Yamaha or Sierra Marine product.\u003c\/li\u003e\n  \u003cli\u003eNever operate an outboard without an adequate water supply.\u003c\/li\u003e\n  \u003cli\u003eIncorrect installation can cause inadequate cooling, overheating, or engine damage.\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 service and repair applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-focused listings\u003c\/strong\u003e — Product references and engine information are provided to help customers compare their existing parts before ordering.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSupport when fitment matters\u003c\/strong\u003e — When model suffixes or original part numbers differ, verify the complete application before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723783868731,"sku":"17KY006","price":35.64,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_15_20_HP___6AH-W0078-00-00_6AH-W0078-01-00_6AH-W0078-02-00_-_JLM_MARINE-8286400.jpg?v=1763031698"},{"product_id":"timing-belt-fits-tohatsu-mercury-yamaha-9-9-20-hp-replaces-3h8-10061-0-57-835392q-66m-46241-00-00","title":"Timing Belt for Yamaha F9.9\/F15, Mercury\/Mariner 9.9\/15, Tohatsu 9.9–20 HP and Evinrude\/Johnson 15 HP 4-Stroke Outboards","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\u003eengine timing belt\u003c\/strong\u003e is a direct replacement for selected 4-stroke marine outboards. It is sold as one belt and is intended to maintain correct camshaft-to-crankshaft timing during engine operation.\u003c\/p\u003e\n\u003cp\u003eCompany fitment records identify this belt for selected Yamaha F9.9 and F15 models, Mercury and Mariner 9.9 HP and 15 HP 4-stroke models within the listed serial-number ranges, Tohatsu 9.9–20 HP 4-stroke outboards, and Evinrude\/Johnson\/OMC\/BRP 15 HP 4-stroke applications. Confirm the complete model and serial-number conditions before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Replacement engine timing belt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e One belt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Selected 4-stroke outboard engines\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaintenance guidance:\u003c\/strong\u003e The company catalog recommends replacement at 5 years or 100 hours of use, subject to the engine manufacturer's service instructions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number References\u003c\/h2\u003e\n\u003cp\u003eUse the manufacturer reference for your specific engine when confirming compatibility. Reference numbers are listed by application and should not be treated as universal fitment across every engine model.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eManufacturer Reference\u003c\/th\u003e\n\u003cth\u003eAftermarket Reference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha Outboard\u003c\/td\u003e\n\u003ctd\u003e66M-46241-00\u003c\/td\u003e\n\u003ctd\u003e18-15137\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n\u003ctd\u003e835392Q; 57-835392Q; 57835392Q; 895120002; 57-895120002\u003c\/td\u003e\n\u003ctd\u003e18-15147\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e3H8-10061-0; 3H8100610M\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEvinrude \/ Johnson \/ OMC \/ BRP\u003c\/td\u003e\n\u003ctd\u003e5041079\u003c\/td\u003e\n\u003ctd\u003e—\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\u003eFitment depends on the brand, model, production period, and—especially for Mercury and Mariner engines—the serial-number range. Match all available information before installation.\u003c\/p\u003e\n\n\u003ch3\u003eYamaha 4-Stroke Outboards\u003c\/h3\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Yamaha Compatibility\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF9.9\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2005–2006\u003c\/td\u003e\n\u003ctd\u003e66M-46241-00\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF15\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1998–2005\u003c\/td\u003e\n\u003ctd\u003e66M-46241-00\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eMercury and Mariner 4-Stroke Outboards\u003c\/h3\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Mercury and Mariner Compatibility\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eSerial Number Range\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e0G760300–1B226999\u003c\/td\u003e\n\u003ctd\u003e57-835392Q\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e0G760300–1B226999\u003c\/td\u003e\n\u003ctd\u003e57-835392Q\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e1B227000–1B727495\u003c\/td\u003e\n\u003ctd\u003e57-835392Q\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp\u003eFor Mercury and Mariner applications, the serial-number range is part of the fitment specification. Do not rely on horsepower alone.\u003c\/p\u003e\n\n\u003ch3\u003eTohatsu 4-Stroke Outboards\u003c\/h3\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Tohatsu Compatibility\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eModel or Application\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 9.9 HP outboards\u003c\/td\u003e\n\u003ctd\u003e3H8-10061-0; 3H8100610M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 15 HP outboards\u003c\/td\u003e\n\u003ctd\u003e3H8-10061-0; 3H8100610M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e18\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 18 HP outboards\u003c\/td\u003e\n\u003ctd\u003e3H8-10061-0; 3H8100610M\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTohatsu\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 20 HP outboards\u003c\/td\u003e\n\u003ctd\u003e3H8-10061-0; 3H8100610M\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eEvinrude, Johnson, OMC and BRP 4-Stroke Outboards\u003c\/h3\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Evinrude and Johnson Compatibility\"\u003e\n    \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eEvinrude \/ Johnson \/ OMC \/ BRP\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected 15 HP outboards\u003c\/td\u003e\n\u003ctd\u003e5041079\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\u003eEngine timing belt\u003c\/dd\u003e\n  \u003cdt\u003ePart Configuration\u003c\/dt\u003e\n\u003cdd\u003eSingle replacement belt; not a complete timing-belt service kit\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eSelected 4-stroke gasoline outboard engines\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement when the application and reference number match\u003c\/dd\u003e\n  \u003cdt\u003eIncluded Components\u003c\/dt\u003e\n\u003cdd\u003eOne timing belt\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e1 x\u003c\/span\u003e Engine timing belt\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTensioners, pulleys, seals, keys, covers, and other engine components are not included.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eTurn off the engine, disconnect the battery where applicable, and allow the engine to cool before service.\u003c\/li\u003e\n  \u003cli\u003eRemove the cowling and timing-belt covers according to the engine manufacturer's service procedure.\u003c\/li\u003e\n  \u003cli\u003eSet the crankshaft and camshaft to the manufacturer's specified timing positions before removing the old belt.\u003c\/li\u003e\n  \u003cli\u003eInspect the pulleys, tensioner, seals, and surrounding components for wear, contamination, or damage.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement belt without forcing, twisting, or contaminating it with oil or fuel.\u003c\/li\u003e\n  \u003cli\u003eSet belt tension and verify all timing marks using the correct service manual.\u003c\/li\u003e\n  \u003cli\u003eRotate the engine by hand as specified by the manufacturer and recheck timing before starting the engine.\u003c\/li\u003e\n  \u003cli\u003eReinstall the covers and all removed components, then test the engine for correct operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eTiming-belt installation requires accurate timing alignment. Professional installation is recommended if the required tools or service information are not available.\u003c\/p\u003e\n\n\u003ch2\u003eMaintenance and FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm that this belt fits my engine?\u003c\/summary\u003e\n  \u003cp\u003eMatch the engine brand, model, horsepower, stroke, production year where listed, and Mercury or Mariner serial-number range against the compatibility tables. Also compare the manufacturer reference on the existing belt or in the engine parts manual.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhen should the timing belt be replaced?\u003c\/summary\u003e\n  \u003cp\u003eThe company catalog recommends a 5-year or 100-hour maintenance interval. Always follow the engine manufacturer's service manual if it specifies a different interval or inspection procedure.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are signs that a timing belt may need replacement?\u003c\/summary\u003e\n  \u003cp\u003eCracking, fraying, missing or damaged teeth, oil contamination, abnormal slack, or visible wear are reasons to stop using the belt and inspect the complete timing system. An engine that runs poorly or will not start may have timing-system problems, but diagnosis should be performed before replacing parts.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a complete timing-belt kit?\u003c\/summary\u003e\n  \u003cp\u003eNo. This listing is for one timing belt only. Tensioners, pulleys, seals, keys, and other components are not included.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM belt?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for an aftermarket replacement belt. The manufacturer references shown above are provided for application identification and cross-reference purposes.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety and Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the complete engine identification and reference number before ordering.\u003c\/li\u003e\n  \u003cli\u003eMercury and Mariner compatibility is serial-number dependent; horsepower alone is not sufficient.\u003c\/li\u003e\n  \u003cli\u003eDo not install a belt that is damaged, contaminated, or visibly different from the required part.\u003c\/li\u003e\n  \u003cli\u003eIncorrect timing-belt installation can cause serious engine damage. Use the manufacturer's service manual.\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 — Parts selected for common outboard maintenance and repair applications.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Compatibility information is organized by engine brand, model, horsepower, stroke, year, and serial range where available.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaintenance Support\u003c\/strong\u003e — Clear product information helps you confirm the correct replacement before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723984376123,"sku":"23BL223","price":46.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23BL223_1.jpg?v=1763039410"},{"product_id":"water-pump-repair-kit-fits-yamaha-f15-f20-f9-9-4-stroke-replaces-6ah-w0078-00-sierra-18-3479-18-3484","title":"Water Pump Repair Kit with Housing for Yamaha F15C and F20 4-Stroke Outboards – Replaces 6AH-W0078-00-00","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 {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap;\n    word-break:normal;\n    letter-spacing:normal;\n    font-weight:600;\n    background:#f8fafc;\n  }\n  @media (max-width:480px){\n    table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; }\n  }\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 F15C and F20 four-stroke outboards. It replaces the Yamaha OEM water pump repair kit reference \u003cstrong\u003e6AH-W0078-00-00\u003c\/strong\u003e and is supplied as a complete service kit with the water pump housing, impeller, wear plates, seals, key, dowel pins, and mounting hardware listed below.\u003c\/p\u003e\n\u003cp\u003eCatalog applications identify this water pump kit for Yamaha F15C and F20 four-stroke models in the 2006–2017 application range. Model suffix, year, shaft configuration, and serial-number conditions can affect fitment, so compare your original assembly and OEM reference before ordering.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eComplete water pump repair kit with housing.\u003c\/li\u003e\n\u003cli\u003eIncludes the primary wear, sealing, drive, and mounting components needed for a water pump service.\u003c\/li\u003e\n\u003cli\u003eAftermarket replacement for the listed Yamaha OEM reference.\u003c\/li\u003e\n\u003cli\u003eSuitable for service or replacement of a worn water pump assembly when the application is confirmed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThese references are provided for identification and cross-reference purposes. They should not be treated as interchangeable unless the application and package configuration match.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003cth\u003eReference Type\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003eOEM reference\u003c\/td\u003e\n        \u003ctd\u003eWater pump repair kit reference for selected F15C and F20 applications.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-01-00\u003c\/td\u003e\n        \u003ctd\u003eOEM catalog reference\u003c\/td\u003e\n        \u003ctd\u003eListed for selected later F15 and F20 applications; verify the exact engine year and model.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-02-00\u003c\/td\u003e\n        \u003ctd\u003eOEM catalog reference\u003c\/td\u003e\n        \u003ctd\u003eListed for selected later F15 and F20 applications; verify the exact engine year and model.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3479\u003c\/td\u003e\n        \u003ctd\u003eAftermarket cross-reference\u003c\/td\u003e\n        \u003ctd\u003eWater pump kit reference; confirm housing configuration before using as a cross-reference.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSierra\u003c\/td\u003e\n        \u003ctd\u003e18-3484\u003c\/td\u003e\n        \u003ctd\u003eComponent reference\u003c\/td\u003e\n        \u003ctd\u003eWater pump housing reference, not a complete-kit equivalence.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eCatalog evidence identifies the following broad application. Always verify the complete model designation, year, shaft configuration, and OEM reference against your engine 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\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel Family\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eApplication Years\u003c\/th\u003e\n        \u003cth\u003eOEM Reference\u003c\/th\u003e\n        \u003cth\u003eFitment Notes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF15C\u003c\/td\u003e\n        \u003ctd\u003e15\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2006–2017 application range\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003eVerify the full model suffix, shaft configuration, year, and serial number.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF20\u003c\/td\u003e\n        \u003ctd\u003e20\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e2006–2017 application range\u003c\/td\u003e\n        \u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n        \u003ctd\u003eVerify the full model suffix, shaft configuration, year, and serial number.\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 The available catalog relationship confirms the F15C and F20 application family. It does not confirm every F15, F20, F9.9, F13.5, or other Yamaha model. Do not rely on horsepower alone when confirming fitment.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eOutboard water pump repair kit with housing\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected Yamaha F15C and F20 4-stroke outboards\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eReplacement water pump service assembly; confirm fitment before installation\u003c\/dd\u003e\n  \u003cdt\u003eHousing\u003c\/dt\u003e\n  \u003cdd\u003eIncluded\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n  \u003cdd\u003ePlastic\/composite aftermarket housing\u003c\/dd\u003e\n  \u003cdt\u003eManufacturer Status\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement; not a Yamaha Genuine OEM component\u003c\/dd\u003e\n  \u003cdt\u003ePrimary OEM Reference\u003c\/dt\u003e\n  \u003cdd\u003e6AH-W0078-00-00\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Water pump housing, OEM reference 6AH-44311-00-00\u003c\/li\u003e\n  \u003cli\u003e1 x Cartridge insert, OEM reference 63V-44322-00-00\u003c\/li\u003e\n  \u003cli\u003e1 x Water seal damper, OEM reference 6L2-44367-00-00\u003c\/li\u003e\n  \u003cli\u003e1 x Impeller, OEM reference 63V-44352-01-00\u003c\/li\u003e\n  \u003cli\u003e1 x Woodruff key, OEM reference 664-44338-00-00\u003c\/li\u003e\n  \u003cli\u003e1 x O-ring, OEM reference 93210-49046-00\u003c\/li\u003e\n  \u003cli\u003e1 x Cartridge outer plate, OEM reference 68T-44323-00-00\u003c\/li\u003e\n  \u003cli\u003e2 x Dowel pins, OEM reference 93604-10M03-00\u003c\/li\u003e\n  \u003cli\u003e4 x Bolts with washers, OEM reference 97095-08045-00\u003c\/li\u003e\n  \u003cli\u003e2 x Plates, OEM reference 63V-44328-01-00\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery cables and follow the outboard manufacturer's safety procedures before beginning service.\u003c\/li\u003e\n  \u003cli\u003ePlace the outboard in neutral and remove the lower-unit mounting hardware. Carefully separate the lower unit from the upper housing.\u003c\/li\u003e\n  \u003cli\u003eRemove the old water pump housing and disassemble the existing impeller, plates, seals, key, and related hardware.\u003c\/li\u003e\n  \u003cli\u003eClean the mating surfaces and inspect the drive shaft, pump plate, keyway, and water passages for wear, corrosion, or blockage.\u003c\/li\u003e\n  \u003cli\u003eInstall the supplied key, impeller, plates, seal, insert, and housing in the correct order. Ensure the impeller is correctly positioned on the drive shaft.\u003c\/li\u003e\n  \u003cli\u003eInstall the supplied dowel pins and bolts with washers. Tighten fasteners to the torque specification in the Yamaha service manual for your exact engine.\u003c\/li\u003e\n  \u003cli\u003eReinstall the lower unit using the manufacturer's recommended procedure and check that the shift mechanism engages correctly.\u003c\/li\u003e\n  \u003cli\u003eTest the outboard in a suitable water-filled test tank or with an appropriate flushing device. Confirm a steady tell-tale stream and monitor for overheating before returning the boat to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I confirm that this kit fits my Yamaha outboard?\u003c\/summary\u003e\n  \u003cp\u003eConfirm that your engine is a Yamaha F15C or F20 four-stroke in the applicable year range, then compare the full model designation, shaft configuration, serial-number range, original pump assembly, and OEM reference 6AH-W0078-00-00. Horsepower by itself is not sufficient for fitment confirmation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this kit include the water pump housing?\u003c\/summary\u003e\n  \u003cp\u003eYes. This package is the with-housing configuration and includes one water pump housing together with the impeller, insert, plates, seal, key, O-ring, dowel pins, and four bolts with washers listed in the package contents.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this a Yamaha Genuine OEM kit?\u003c\/summary\u003e\n  \u003cp\u003eNo. This is an aftermarket replacement kit. Yamaha part numbers are shown only as OEM reference numbers for identification and fitment comparison.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eAre Sierra 18-3479 and 18-3484 the same product?\u003c\/summary\u003e\n  \u003cp\u003eNo. Catalog information identifies Sierra 18-3479 as a water pump kit reference and Sierra 18-3484 as a water pump housing reference. They should not be treated as the same complete package or used to infer identical contents.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are common signs of a worn water pump?\u003c\/summary\u003e\n  \u003cp\u003ePossible symptoms include a weak or intermittent tell-tale stream, overheating at idle or low speed, steam from the exhaust, or reduced cooling-water flow. Inspect the impeller and related pump components when these symptoms occur.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow often should the water pump be serviced?\u003c\/summary\u003e\n  \u003cp\u003eService timing depends on the engine manufacturer's maintenance schedule, operating hours, and water conditions. Inspect the impeller and pump components at the intervals specified in your Yamaha service documentation, and service sooner if the engine operates in sandy, silty, or salt water.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eConfirm the complete engine model, year, shaft configuration, serial range, and OEM reference before ordering.\u003c\/li\u003e\n  \u003cli\u003eDo not assume fitment for F9.9, F13.5, or other Yamaha models based only on horsepower or general F-series naming.\u003c\/li\u003e\n  \u003cli\u003eCompare the original pump assembly and package contents before installation.\u003c\/li\u003e\n  \u003cli\u003eUse the correct torque values and service procedures for your exact outboard.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended if you are not experienced with lower-unit or water-pump service.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement and is not manufactured or endorsed by Yamaha.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMarine replacement parts selected for practical service and repair applications.\u003c\/li\u003e\n  \u003cli\u003eClear component listings and cross-reference information to support fitment checks.\u003c\/li\u003e\n  \u003cli\u003eAftermarket value for routine outboard maintenance and water-pump service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723987325243,"sku":"23KY707","price":67.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_F99_-_F135_-_F15_-_F15_-_F20_-_F20_6AH-W0078-00_-_JLM_MARINE-8289317.jpg?v=1763039514"},{"product_id":"water-pump-impeller-kit-fits-yamaha-9-9-13-5-15-20hp-4-stroke-outboards-replaces-6ah-w0078-00","title":"Water Pump Impeller Kit – Fits Yamaha 9.9\/13.5\/15\/20 HP 4-Stroke Outboards (Replaces 6AH-W0078-00)","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 Impeller Kit\u003c\/strong\u003e is designed for selected Yamaha 4-stroke outboard models, including the F9.9, F13.5, F15, F15C, F15L, F20, F20B, and F20L series. The listed model, year, and serial-number conditions should be checked before ordering to help ensure correct fitment.\u003c\/p\u003e\n\u003cp\u003eThis kit is listed as an aftermarket replacement for Yamaha water-pump references \u003cstrong\u003e6AH-W0078-00-00\u003c\/strong\u003e, \u003cstrong\u003e6AH-W0078-01-00\u003c\/strong\u003e, and \u003cstrong\u003e6AH-W0078-02-00\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for direct replacement of the corresponding water-pump components.\u003c\/li\u003e\n  \u003cli\u003eIncludes the impeller, housing, plates, seals, gaskets, key, dowel pins, and mounting hardware listed below.\u003c\/li\u003e\n  \u003cli\u003eFor cooling-system service on compatible Yamaha 4-stroke outboards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse this matrix to compare the listed Yamaha reference numbers.\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\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eSuperseded By\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\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-01-00\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-01-00\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-02-00\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-02-00\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003eCurrent listed version\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n\u003cp\u003eConfirm the exact engine model, year, and serial-number range before installation. The following compatibility information applies only to the listed Yamaha 4-stroke configurations.\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\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eOEM Part No.\u003c\/th\u003e\n\u003cth\u003eModel or Serial Notes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF9.9\u003c\/td\u003e\n\u003ctd\u003e9.9\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2009–2016\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003e6CA1–6AC9\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF13.5\u003c\/td\u003e\n\u003ctd\u003e13.5\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2009\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003e6AF1–6AF3\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF15\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2014\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003e6AG1–6AG9\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF15\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2015–2016\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003e6AGA–6AGB\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF15C\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2008–2017\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003eF15CEHL, F15CEHS\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF15C\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2017\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003eF15CMHL, F15CMHS\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF15L\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2022\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003eF15LEHA, F15LMHA\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2014\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003e6AH1–6AH9\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2015–2016\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003e6AHA–6AHB\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF20B\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2017\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003eF20BEHPL, F20BEPL, F20BMHL, F20BMHS\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF20L\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2007–2022\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003ctd\u003eF20LMHA, F20LPA, F20LPHA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eWater Pump Impeller Repair Kit\u003c\/dd\u003e\n  \u003cdt\u003eApplication\u003c\/dt\u003e\n  \u003cdd\u003eSelected Yamaha 4-stroke outboards from 9.9 HP to 20 HP\u003c\/dd\u003e\n  \u003cdt\u003eInstallation\u003c\/dt\u003e\n  \u003cdd\u003eDirect replacement for the corresponding water-pump assembly\u003c\/dd\u003e\n  \u003cdt\u003eHousing Material\u003c\/dt\u003e\n  \u003cdd\u003eCast iron\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Water Pump Housing (6AH-44311-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Cartridge Insert (63V-44322-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Water Seal Damper (6L2-44367-00-00\/6L2-44367-01-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Impeller (63V-44352-01-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Woodruff Key (664-44338-00-00)\u003c\/li\u003e\n  \u003cli\u003e1 x O-Ring (93210-49046-00)\u003c\/li\u003e\n  \u003cli\u003e1 x Cartridge Outer Plate (68T-44323-00-00)\u003c\/li\u003e\n  \u003cli\u003e2 x Dowel Pins (93604-10M03-00)\u003c\/li\u003e\n  \u003cli\u003e4 x Bolts (97095-08045-00)\u003c\/li\u003e\n  \u003cli\u003e2 x Plates (63V-44328-01-00)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the negative battery cable before beginning work.\u003c\/li\u003e\n  \u003cli\u003ePlace a drain pan under the lower unit and remove the gearcase oil drain screw to drain the lubricant.\u003c\/li\u003e\n  \u003cli\u003eRemove the bolts securing the lower unit to the engine’s upper casing, then carefully lower the unit.\u003c\/li\u003e\n  \u003cli\u003eUnbolt and remove the existing water-pump housing to access the impeller and related components.\u003c\/li\u003e\n  \u003cli\u003eClean all mating surfaces thoroughly and remove old gasket material or sealant.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement woodruff key, impeller, plates, seals, and other supplied components. Orient the impeller blades in the direction of driveshaft rotation.\u003c\/li\u003e\n  \u003cli\u003eSeat the replacement housing and tighten the bolts to the engine manufacturer’s specified torque.\u003c\/li\u003e\n  \u003cli\u003eReinstall the lower unit, refill it with the correct gearcase lubricant, and reconnect the battery.\u003c\/li\u003e\n  \u003cli\u003eRun the engine in an appropriate water source and verify a strong, steady stream from the cooling-system tell-tale outlet.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eHow do I know if my water pump needs replacing?\u003c\/summary\u003e\n  \u003cp\u003eCommon signs include a weak or intermittent stream from the tell-tale outlet, an engine-overheating warning, or an impeller that is cracked, brittle, worn, or deformed during inspection.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the recommended replacement interval for this kit?\u003c\/summary\u003e\n  \u003cp\u003eInspect the impeller regularly, preferably during annual maintenance. Replacement timing depends on operating hours, water conditions, storage conditions, and the engine manufacturer’s maintenance schedule. Replace worn or damaged components immediately.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this fit my specific engine serial number?\u003c\/summary\u003e\n  \u003cp\u003eCheck the engine model, year, and serial or model-code information against the compatibility table. The listed model and serial conditions must be considered together; a horsepower match alone does not confirm fitment.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the signs of an incorrectly installed impeller?\u003c\/summary\u003e\n  \u003cp\u003eOverheating, no tell-tale stream, or an unusually weak stream can indicate incorrect installation. Possible causes include incorrectly oriented impeller blades, a missing woodruff key, damaged seals, or an improperly seated housing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eOEM vs. Aftermarket: What’s the difference?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for an aftermarket replacement, not a Yamaha OEM component. The Yamaha part numbers shown are reference numbers for comparison and fitment identification.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat are the shipping speed and costs?\u003c\/summary\u003e\n  \u003cp\u003eStandard shipping is free where offered. Typical transit is 5–15 days, while expedited options may be available at checkout depending on the destination.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat is the warranty and return policy?\u003c\/summary\u003e\n  \u003cp\u003eThis product is covered by a 1-year warranty against manufacturing defects under normal use. Returns are accepted within the applicable standard return window when the item is unused and in its original condition. Contact support for instructions before returning an item.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the engine model, year, serial or model-code range, and original water-pump components before ordering.\u003c\/li\u003e\n  \u003cli\u003eCompare the supplied components with the original assembly before installation. Do not install a component that differs in a way that could affect fitment or operation.\u003c\/li\u003e\n  \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eFollow the engine manufacturer’s service procedures and torque specifications. Professional installation is recommended.\u003c\/li\u003e\n  \u003cli\u003eNever run an outboard without an appropriate water supply.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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 engineered for dependable service in real-world operating conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery is available to most regions, with typical transit of 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing and practical replacement solutions for marine maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723987358011,"sku":"SIE-17KY006","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_F99_-_F135_-_F15_-_F15_-_F20_-_F20_6AH-W0078-00_-_JLM_MARINE-8289230.jpg?v=1763039516"},{"product_id":"water-pump-impeller-kit-fits-yamaha-f9-9-f13-5-f15-f20-outboard-motors-replaces-6ah-w0078-00-00","title":"Water Pump Repair Kit for Yamaha F15C and F20 4-Stroke Outboards – Replaces 6AH-W0078-00-00","description":"\u003cstyle\u003e\n.ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\ntable.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\ntable.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\ntable.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 aftermarket \u003cstrong\u003eWater Pump Repair Kit\u003c\/strong\u003e is designed to restore the cooling-water pump on selected Yamaha F15C and F20 four-stroke outboard engines. The water pump circulates cooling water through the engine; worn or damaged pump components can reduce water flow and contribute to overheating.\u003c\/p\u003e\n\u003cp\u003eThe kit is associated with Yamaha water pump repair kit references \u003cstrong\u003e6AH-W0078-00-00\u003c\/strong\u003e, \u003cstrong\u003e6AH-W0078-01-00\u003c\/strong\u003e, and \u003cstrong\u003e6AH-W0078-02-00\u003c\/strong\u003e. Sierra reference \u003cstrong\u003e18-3479\u003c\/strong\u003e is also listed as an aftermarket cross-reference. Because Yamaha model codes, production years, and lower-unit configurations can differ, confirm the complete model code and the part number from your service manual before ordering.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInstalls in the outboard lower unit.\u003c\/li\u003e\n\u003cli\u003eReplaces worn water-pump service components to help restore cooling-water circulation.\u003c\/li\u003e\n\u003cli\u003eSuitable for selected Yamaha F15C and F20 four-stroke applications listed below.\u003c\/li\u003e\n\u003cli\u003eAftermarket replacement; Yamaha and Sierra references are used for identification and compatibility comparison only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eThese references are provided to help compare the kit with the part number shown in your engine service documentation.\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\u003ePart 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\u003e6AH-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\u003e6AH-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\u003e6AH-W0078-02-00\u003c\/td\u003e\n\u003ctd\u003eWater pump repair kit reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3479\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\u003eThe catalog evidence available for these references identifies Yamaha F15C and F20 four-stroke applications. Fitment depends on the complete model code and model year, so use the table as a guide and verify your engine identification 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 Family\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eDocumented Examples\u003c\/th\u003e\n\u003cth\u003eRelated 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\u003eF15C\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eF15CELH, F15CESH, F15CMLH, F15CMSH, F15CPLH; 2007 catalog examples\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF15C \/ F15L variants\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eSelected F15LEHA, F15LMHA, F15LPHA, F15SEHA, and F15SMHA applications are documented with later suffix references; verify year and model code\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-01-00 or 6AH-W0078-02-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF20\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003eF20ELH, F20ELR, F20ESH, F20ESR, and F20MLH; 2007 catalog examples\u003c\/td\u003e\n\u003ctd\u003e6AH-W0078-00-00\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 The available evidence does not establish universal fitment for every F9.9, F13.5, F15, or F20 engine. The former F9.9 and F13.5 claims have therefore been removed. Match the full model designation and year, not horsepower alone.\u003c\/p\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 Repair Kit\u003c\/dd\u003e\n\u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eSelected Yamaha F15C and F20 4-Stroke outboard engines\u003c\/dd\u003e\n\u003cdt\u003eInstallation Location\u003c\/dt\u003e\n\u003cdd\u003eLower unit \/ water pump assembly\u003c\/dd\u003e\n\u003cdt\u003eProduct Status\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement part\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\u003cp\u003eThe listed kit contents are intended for servicing the water-pump assembly. Compare the components with your original parts before installation.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1 x Water Pump Housing (6AH-44311-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Cartridge Insert (63V-44322-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Water Seal Damper (6L2-44367-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x Impeller (63V-44352-01-00)\u003c\/li\u003e\n\u003cli\u003e1 x Woodruff Key (664-44338-00-00)\u003c\/li\u003e\n\u003cli\u003e1 x O-Ring (93210-49046-00)\u003c\/li\u003e\n\u003cli\u003e1 x Cartridge Outer Plate (68T-44323-00-00)\u003c\/li\u003e\n\u003cli\u003e2 x Dowel Pins (93604-10M03-00)\u003c\/li\u003e\n\u003cli\u003e4 x Bolts (97095-08045-00)\u003c\/li\u003e\n\u003cli\u003e2 x Plates (63V-44328-01-00)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect the battery and follow the safety instructions in the engine service manual.\u003c\/li\u003e\n\u003cli\u003ePlace a drain pan beneath the lower unit and drain the gearcase lubricant as required by the service procedure.\u003c\/li\u003e\n\u003cli\u003eRemove the hardware securing the lower unit to the upper casing.\u003c\/li\u003e\n\u003cli\u003eLower and separate the lower unit carefully, paying attention to the driveshaft, shift shaft, and water-tube connections.\u003c\/li\u003e\n\u003cli\u003eRemove the water-pump cover or housing and retain the parts needed for comparison.\u003c\/li\u003e\n\u003cli\u003eClean the mating surfaces and remove the old impeller, key, seals, plates, and gaskets as applicable.\u003c\/li\u003e\n\u003cli\u003eInstall the replacement components in the order specified by the service manual. Lubricate seals only with a product compatible with the material and application.\u003c\/li\u003e\n\u003cli\u003eInstall the impeller with the vanes oriented according to the direction of driveshaft rotation and the manufacturer’s procedure.\u003c\/li\u003e\n\u003cli\u003eReassemble the water-pump housing and tighten fasteners to the manufacturer’s specified torque.\u003c\/li\u003e\n\u003cli\u003eReinstall the lower unit while aligning the driveshaft, shift shaft, and water tube.\u003c\/li\u003e\n\u003cli\u003eRefill the gearcase with the correct lubricant and quantity before operating the engine.\u003c\/li\u003e\n\u003cli\u003eRun the engine only with an appropriate water supply and confirm a steady tell-tale stream and normal operating temperature.\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 can I confirm that this kit fits my engine?\u003c\/summary\u003e\n\u003cp\u003eCheck the complete Yamaha model code, model year, and the water-pump part number in your service manual. F15C and F20 horsepower labels alone are not sufficient because different model variants can use different water-pump references.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat are the signs of a failing water-pump impeller?\u003c\/summary\u003e\n\u003cp\u003eCommon signs include a weak or missing tell-tale stream, overheating warnings, higher-than-normal operating temperature, or visibly cracked, hardened, or damaged impeller vanes. Always investigate restricted passages, damaged seals, and other cooling-system faults as well.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow often should the water pump be serviced?\u003c\/summary\u003e\n\u003cp\u003eFollow the maintenance schedule for your specific Yamaha engine. Inspect the impeller and related pump components more frequently when operating in saltwater, shallow water, sand, or silt. Replace parts that show wear, deformation, cracking, or loss of flexibility.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n\u003cp\u003eNo. This listing is for an aftermarket replacement water pump repair kit. Yamaha and Sierra names and part numbers are shown only as identification and cross-reference information.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes the kit fit every Yamaha F15 or F20?\u003c\/summary\u003e\n\u003cp\u003eNo universal fitment should be assumed. Confirm the complete model code, year, and reference number before ordering; model family, shaft configuration, and production-year changes may affect compatibility.\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 model code, year, original part, and kit contents before installation.\u003c\/li\u003e\n\u003cli\u003eDo not operate the outboard without an adequate water supply.\u003c\/li\u003e\n\u003cli\u003eUse the service manual for torque values, gearcase procedures, alignment instructions, and safety requirements.\u003c\/li\u003e\n\u003cli\u003eImproper water-pump installation can cause inadequate cooling and serious engine damage.\u003c\/li\u003e\n\u003cli\u003eProfessional installation by a qualified marine technician is recommended when the lower unit or cooling system is unfamiliar.\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 Replacement Parts\u003c\/strong\u003e — We provide aftermarket components for common outboard maintenance and repair applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication-Focused Information\u003c\/strong\u003e — Product references and fitment guidance are presented to help customers compare their original parts and engine documentation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService Support\u003c\/strong\u003e — Always use the engine manufacturer’s service information for final compatibility, installation, and maintenance decisions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723987390779,"sku":"17KY006-KOPS","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_F99_-_F135_-_F15_-_F15_-_F20_-_F20_6AH-W0078-00_-_JLM_MARINE-8289135.jpg?v=1763039519"}],"url":"https:\/\/seasierra.com\/collections\/yamaha-4-stroke-9-9-20hp-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}