{"title":"Yamaha 55-60HP 4-Stroke Outboard Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e5e5; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page is for Yamaha 55–60HP 4‑Stroke outboard engines. Use it to find compatible parts and service information. Below you’ll find maintenance tips, commonly replaced 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.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block; margin-top:8px; padding:10px 14px; background:#0b5; 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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 55–60HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eFind the nameplate\/ID label on the transom bracket (usually port side) or swivel bracket. It shows the model code and serial number.\u003c\/li\u003e\n    \u003cli\u003eModel code basics: “F” = 4‑Stroke (e.g., F60), “T” = High‑Thrust 4‑Stroke (e.g., T60). Suffix letters\/numbers indicate shaft length (S\/L\/X), control\/trim type, and year code.\u003c\/li\u003e\n    \u003cli\u003eVisual cues: 4‑Stroke models have an engine oil fill\/cap and EFI\/fuel system components under the cowling. Cowling labels typically show “F60” or “T60”.\u003c\/li\u003e\n    \u003cli\u003eIf you’re unsure whether you have standard F60 vs. High‑Thrust T60, check the propeller size and gearcase: T60 units use larger, low‑pitch props and different gear ratios.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eYamaha F60 (55–60HP class)\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‑4 EFI 4‑Stroke, mid‑range outboard designed for light to medium hulls.\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;\"\u003eF60 variants (regional year\/feature codes vary). Often shares a platform with select 50HP 4‑Stroke models.\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;\"\u003eGood fuel economy, reliable EFI starting, smooth idle, broad parts availability.\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 parts (filters, plugs, water pump kits) are shared across the F50\/F60 family. Verify by model code\/serial for exact gearcase and prop fit.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eYamaha T60 High‑Thrust (Heavy‑duty 55–60HP class)\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‑4 EFI 4‑Stroke tuned for thrust; larger gearcase and low‑pitch props suit heavy or high‑drag boats.\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;\"\u003eT60 High‑Thrust variants (regional year\/feature codes vary).\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;\"\u003eSuperior low‑speed control and push, ideal for pontoons, workboats, and sailboats.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003ePropellers, gear ratios, and some gearcase components differ from standard F60. Confirm T60 designation before ordering prop or gearcase parts.\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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for typical use. Always follow your specific Yamaha service manual and local operating conditions.\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 (after first 20 hours)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px; border-bottom:1px solid #f0f0f0;\"\u003eUse marine‑grade FC‑W oil; replace filter with each oil change.\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;\"\u003eInspect drain\/fill gaskets; check for water intrusion or metal on magnet.\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 hours; replace ~300 hours or as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px; border-bottom:1px solid #f0f0f0;\"\u003eGap to spec; replace fouled or worn plugs to maintain idle and efficiency.\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\u003c\/td\u003e\n        \u003ctd style=\"padding:6px; border-bottom:1px solid #f0f0f0;\"\u003eCheck often; replace 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:6px; border-bottom:1px solid #f0f0f0;\"\u003eEssential with ethanol fuels; drain water and replace elements regularly.\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;\"\u003eEvery 2 years or 200 hours (sooner in sandy\/silty water)\u003c\/td\u003e\n        \u003ctd style=\"padding:6px; border-bottom:1px solid #f0f0f0;\"\u003eMaintain strong tell‑tale to prevent overheating.\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 50 hours; replace when 50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px; border-bottom:1px solid #f0f0f0;\"\u003eMatch anode material to water type (zinc, aluminum, or magnesium).\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;\"\u003eThermostat inspection\/replacement\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect annually; replace 2–3 years or as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eReplace if stuck or corroded; a cool‑running engine can indicate stuck‑open.\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=\"margin-top:24px;\"\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\u003eGearcase \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\u003ePropellers \u0026amp; Hardware – \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-propellers\"\u003eYamaha Propellers\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\u003eIgnition \/ Electrical – \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel Filtration – \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"margin-top:24px;\"\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, gaskets, 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 or ventilation; replace fuel filter; verify spark plug condition.\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 or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:6px; border-bottom:1px solid #f0f0f0;\"\u003eConfirm battery voltage and cable connections; renew spark plugs; check for stale fuel.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px; border-bottom:1px solid #f0f0f0;\"\u003eSpark plugs, fuel filter, starter\/ignition components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:6px;\"\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eInspect gear oil for water\/metal; check prop shaft for fishing line; evaluate bearing play and seals.\u003c\/td\u003e\n        \u003ctd style=\"padding:6px;\"\u003eLower unit seal kit, bearings, washers, 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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre F60 and T60 parts interchangeable with other Yamaha 4‑Stroke models?\u003c\/summary\u003e\n    \u003cp\u003eMany routine service parts are shared across the 4‑cylinder 50–60HP platform, but gearcase, propellers, and certain cooling\/rigging components can differ—especially on High‑Thrust T60 models. Always confirm by model code and serial number before ordering.\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 preventive measure every 2 years or about 200 hours—sooner if you operate in sandy or silty water, or if the tell‑tale weakens. Replace the full pump kit when wear is evident.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should the lower unit gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eTypically every 100 hours or annually. Also change it after any suspected impact or submersion to check for water intrusion or metal debris.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to verify part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the model code (e.g., F60 or T60 with suffix), serial number, shaft length, control type (tiller\/remote), and a brief description or photo of the part location. This ensures accurate cross‑reference.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"margin-top:24px; padding:16px; border:1px solid #e5e5e5; border-radius:8px;\"\u003e\n  \u003cp\u003eReady to find parts? Browse the main Yamaha collection and narrow by horsepower, year, and model to locate compatible components for your 55–60HP 4‑Stroke.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block; margin:8px 0; padding:10px 14px; background:#0b5; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Yamaha Outboard Parts\u003c\/a\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-25-70-hp-replaces-663-44311-02","title":"Water Pump Service Kit with Housing for Yamaha C55 2-Stroke, 1990–1994 – OEM Reference 663-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 {\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 service kit with housing\u003c\/strong\u003e is designed for Yamaha C55 2-stroke outboard engines from model years 1990 through 1994. It is intended for water pump service when the impeller, sealing components, wear components, and pump housing require replacement.\u003c\/p\u003e\n\u003cp\u003eThe company product record identifies this as a service kit supplied \u003cstrong\u003ewith housing\u003c\/strong\u003e. The listed Yamaha OEM reference is \u003cstrong\u003e663-W0078-00\u003c\/strong\u003e. Please compare the original water pump assembly and reference number before ordering, because fitment depends on the exact engine model and year.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eComplete water pump service kit with housing for the specified Yamaha C55 application.\u003c\/li\u003e\n  \u003cli\u003eIncludes service components intended to renew the water pump assembly and restore cooling-water circulation.\u003c\/li\u003e\n  \u003cli\u003eAftermarket replacement component; Yamaha is referenced for application and part-number identification only.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Information\u003c\/h2\u003e\n\u003cp\u003eUse the following reference when confirming the correct water pump service kit for your engine.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Information\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eReference\u003c\/th\u003e\n        \u003cth\u003eApplication note\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha Outboard\u003c\/td\u003e\n        \u003ctd\u003e663-W0078-00\u003c\/td\u003e\n        \u003ctd\u003eWater pump service kit with housing\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 listing is specifically for the following application:\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Engine Compatibility\"\u003e\n    \u003cthead\u003e\n      \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\u003eModel years\u003c\/th\u003e\n        \u003cth\u003eHousing reference\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\u003eC55\u003c\/td\u003e\n        \u003ctd\u003e55 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1990–1991\u003c\/td\u003e\n        \u003ctd\u003e663-W0078-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eC55\u003c\/td\u003e\n        \u003ctd\u003e55 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1992–1994\u003c\/td\u003e\n        \u003ctd\u003e663-W0078-00\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 assume compatibility with other Yamaha horsepower ratings, C55 variants, 4-stroke engines, or other model years solely because a similar water pump reference appears in another catalog. Confirm the complete model designation, year, original housing, and part-number reference before purchase.\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\u003eBrand application\u003c\/dt\u003e\n  \u003cdd\u003eYamaha Outboard\u003c\/dd\u003e\n  \u003cdt\u003eEngine model\u003c\/dt\u003e\n  \u003cdd\u003eC55\u003c\/dd\u003e\n  \u003cdt\u003eEngine output\u003c\/dt\u003e\n  \u003cdd\u003e55 HP\u003c\/dd\u003e\n  \u003cdt\u003eEngine stroke\u003c\/dt\u003e\n  \u003cdd\u003e2-Stroke\u003c\/dd\u003e\n  \u003cdt\u003eApplicable years\u003c\/dt\u003e\n  \u003cdd\u003e1990–1994\u003c\/dd\u003e\n  \u003cdt\u003eHousing included\u003c\/dt\u003e\n  \u003cdd\u003eYes\u003c\/dd\u003e\n  \u003cdt\u003eProduct status\u003c\/dt\u003e\n  \u003cdd\u003eAftermarket replacement\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n\u003cp\u003eThis product is supplied as a water pump service kit \u003cstrong\u003ewith housing\u003c\/strong\u003e. The kit includes the housing and the service components supplied for the specified application. Component appearance and exact included hardware may vary by production batch, so compare the package contents with the product image and your original assembly before installation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Water pump housing\u003c\/li\u003e\n  \u003cli\u003eWater pump service components for the Yamaha C55 application\u003c\/li\u003e\n  \u003cli\u003eReplacement fasteners as supplied with the kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the battery and place the outboard in neutral before beginning work.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit according to the engine manufacturer's service procedure.\u003c\/li\u003e\n  \u003cli\u003eRemove the original water pump cover and housing, then take out the old impeller and related service components.\u003c\/li\u003e\n  \u003cli\u003eClean gasket surfaces and inspect the driveshaft, water pump plate, water tube, and surrounding components for corrosion, scoring, or damage.\u003c\/li\u003e\n  \u003cli\u003eInstall the new service components and housing in the same orientation as the original assembly. Make sure the impeller vanes and key are correctly positioned if applicable to the engine assembly.\u003c\/li\u003e\n  \u003cli\u003eUse the supplied fasteners only where they match the original hardware and tighten all fasteners to the manufacturer's specified torque.\u003c\/li\u003e\n  \u003cli\u003eReinstall the lower unit, ensuring correct alignment of the driveshaft, shift shaft, and water tube.\u003c\/li\u003e\n  \u003cli\u003eRun the engine using an appropriate water supply and confirm a steady tell-tale stream before returning the boat to service.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eMaintenance \u0026amp; Troubleshooting\u003c\/h2\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWhat indicates a water pump service may be needed?\u003c\/summary\u003e\n  \u003cp\u003eA weak or missing tell-tale stream, an overheating warning, steam, or visible deterioration of the impeller and housing can indicate a cooling-system problem. Stop the engine if it overheats and inspect the water pump before continued operation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this kit include the housing?\u003c\/summary\u003e\n  \u003cp\u003eYes. The company product specification identifies this item as a Yamaha 2-stroke water pump service kit with housing.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this fit another Yamaha engine?\u003c\/summary\u003e\n  \u003cp\u003eThe confirmed application for this listing is the Yamaha C55 2-stroke from 1990 through 1994. Other models, horsepower ratings, strokes, and years are not confirmed by the company fitment record. Verify the original part reference and housing before ordering.\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. Yamaha and reference 663-W0078-00 are used only to identify the intended application and corresponding reference.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the exact Yamaha model, year, stroke, and original water pump housing before purchase.\u003c\/li\u003e\n  \u003cli\u003eCompare the product image and supplied components with your existing assembly before installation.\u003c\/li\u003e\n  \u003cli\u003eUse proper marine-service procedures and follow the engine manufacturer's torque and safety instructions.\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\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\u003eApplication-focused listings\u003c\/strong\u003e — Fitment information is provided by model, year, horsepower, and stroke where available.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eService support\u003c\/strong\u003e — Contact support if you need help comparing your original water pump assembly with this application.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723807789371,"sku":"23KY087","price":45.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_25_to_70_HP_663-44311-02_-_JLM_MARINE-8288881.jpg?v=1763032292"}],"url":"https:\/\/seasierra.com\/collections\/yamaha-55-60hp-4-stroke-outboard-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}