{"title":"Yamaha 4-Stroke Outboard Engine 75-300HP Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page is focused on Yamaha 4-Stroke Outboard Engine 75-300HP models. Use it to find compatible parts and service information, including maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Yamaha outboard collection. Scroll to the bottom of this page to start browsing parts for this engine, and remember that on the collection page you can use the Filter \u0026amp; Sort controls to narrow results by horsepower, year range, and part category\/section.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#1d4ed8; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Yamaha Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 75–300HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate location: Look on the transom\/mounting bracket or swivel bracket for the model\/serial plate (also stamped on an engine label).\u003c\/li\u003e\n    \u003cli\u003eReading the code: Yamaha four-strokes typically start with “F” (e.g., F150, F200). Suffix letters indicate shaft length (S=15\", L=20\", X=25\", U=30\"), control type (R=remote, H=tiller), and other features. A trailing year letter is used on many models.\u003c\/li\u003e\n    \u003cli\u003ePlatform hint: 75–200HP are commonly Inline‑4 EFI four-strokes; 200–300HP are often V6 EFI four-strokes. Some 200HP motors exist in both I‑4 and V6 variants—confirm with the full model code (e.g., F200XB = I‑4; F200XCA = V6 digital control).\u003c\/li\u003e\n    \u003cli\u003eMatch parts: Use the exact model code and serial to verify impellers, anodes, filters, and gearcase components before ordering.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eInline‑4 EFI Four‑Stroke (approx. 75–200HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; max-width:980px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInline‑4 EFI 4‑stroke outboards; common in the F75\/F90\/F115\/F150 and later F175\/F200 I‑4 series.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eExamples: F75LA, F90LB, F115XB, F150TXR, F175XA, F200XB (model codes vary by year, shaft, and controls).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eLight weight for class, good fuel economy, broad parts availability, straightforward maintenance access.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eService parts (impellers, anodes, filters) are model‑ and year‑specific. Verify shaft length and control type in the suffix letters.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eV6 EFI Four‑Stroke (approx. 200–300HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; max-width:980px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eV6 EFI 4‑stroke outboards for offshore and heavy loads; found in F200\/F225\/F250\/F300 families.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eExamples: F200XCA, F225TXR, F250XA, F300XCA. Digital (DEC) and mechanical control versions exist.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eHigh torque, strong charging output, prop options for offshore, robust cooling and gearcase designs.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eMany parts differ from I‑4 models (water pump kits, anodes, filters, thermostats). 200HP appears in both I‑4 and V6—use the exact model code.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Yamaha four‑stroke outboards. Always follow your specific engine’s service manual and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%; max-width:980px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eEngine oil \u0026amp; filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eWarm engine before draining; replace crush washer; verify level after run‑up.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-service-maintenance-kits\"\u003eYamaha Service \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect for water or metal; replace gaskets on drain\/fill screws.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\"\u003eYamaha Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e100 hours (inspect 50)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCheck gap and condition; replace if fouled or out of spec.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/spark-plug\"\u003eSpark Plugs\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eFuel filter \/ water separator\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eDrain water bowl if equipped; replace cartridge\/element as needed.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eFuel pump (inspection)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect 100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCheck pressure\/flow if experiencing hesitation or top‑end loss.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-pumps\"\u003eFuel Pumps\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eWater pump impeller\/kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eEvery 2–3 seasons (or sooner in sandy\/silty water)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eReplace housing\/plate if scored; confirm tell‑tale flow and temperature.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-water-pump-repair-kits\"\u003eYamaha Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eAnodes (internal \u0026amp; external)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect 50 hours; replace at ~50% wear\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eMatch alloy to water type (salt\/brackish\/fresh). Keep contact points clean.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eLower unit seals (inspection)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect at each gear‑oil change\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eMilky oil or leaks after fishing line strikes suggest reseal.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-lower-unit-seal-kits\"\u003eYamaha Lower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003ePropeller \u0026amp; hardware (inspection)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect regularly\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCheck for nicks, bent blades, spun hubs; grease shaft and replace cotter as needed.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-propellers\"\u003eYamaha Propellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service 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\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\u003eFuel System — \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-pumps\"\u003eFuel Pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical — \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-starters\"\u003eYamaha Starters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion \u0026amp; Protection — \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-propellers\"\u003eYamaha Propellers\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/propeller-guards\"\u003ePropeller Guards\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection — \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-anodes\"\u003eYamaha Anodes\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; max-width:980px; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb; padding:8px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eWeak tell‑tale or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eVerify intake screens are clear; inspect impeller and housing; confirm thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eWater pump repair kit, thermostat, intake screen, anodes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eCheck prop condition, fuel quality, fuel filters, and plug condition; test fuel pressure.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003ePropeller, fuel filter, fuel pump, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eConfirm battery voltage; inspect\/replace plugs; check for air leaks on fuel lines and filter bowl.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eSpark plugs, fuel filter, starter\/battery cables\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eGearcase noise or milky oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eInspect drain\/fill screw gaskets; check for fishing line at prop shaft; pressure\/vac test if needed.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f3f4f6;\"\u003eLower unit seal kit, drain\/fill gaskets, prop hardware\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eCharging or electrical issues\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLoad test battery; inspect connections\/grounds; check alternator output and rectifier\/regulator.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eAlternator, rectifier\/regulator, starter cables\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome service parts interchange within the same platform (e.g., many Inline‑4 models share filters or anodes), but there are frequent year and configuration changes. Always confirm by full model code and serial, and whether your engine is an I‑4 or V6.\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 2–3 seasons, or sooner if the tell‑tale is weak, you run in sandy\/silty water, or the housing\/plate shows scoring.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change gear oil?\u003c\/summary\u003e\n    \u003cp\u003eEvery 100 hours or annually, and any time you see water intrusion (milky oil) or metal on the magnet. Replace the drain\/fill gaskets each service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the complete model code (e.g., F150TXR, F200XB, F300XCA), the serial number, shaft length, and control type. Photos of the nameplate and the part area help ensure an exact match.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; border-top:1px solid #e5e7eb;\"\u003e\n  \u003cp\u003eReady to find parts for your Yamaha four‑stroke by horsepower, year, and model? Browse the main Yamaha outboard collection to get started.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block; margin-top:8px; padding:10px 14px; background:#1f2937; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Yamaha Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#6b7280;\"\u003eIf you’re unsure about your model, send us a clear photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"water-pump-repair-kit-fits-yamaha-75-250hp-replaces-61a-w0078-a3-00-61a-w0078-a4-00","title":"Water Pump Repair Kit Without Housing for Yamaha Outboards – Replaces 61A-W0078-A3-00 and 61A-W0078-A4-00","description":"\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\n  table.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis Water Pump Repair Kit is an aftermarket replacement service kit for selected Yamaha outboard cooling-system applications. The kit is supplied without the water-pump housing and is intended to renew the impeller, insert, wear plate, gaskets, O-rings, dowel pins, key, and related pump hardware during water-pump service.\u003c\/p\u003e\n  \u003cp\u003eThe documented Yamaha reference numbers for this configuration include \u003cstrong\u003e61A-W0078-A3-00\u003c\/strong\u003e and \u003cstrong\u003e61A-W0078-A4-00\u003c\/strong\u003e. Because Yamaha used different pump configurations across engine families, confirm the complete engine model, year, stroke, shaft configuration, and original water-pump reference before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eAftermarket water-pump repair kit for selected Yamaha outboards.\u003c\/li\u003e\n    \u003cli\u003eSupplied without the water-pump housing.\u003c\/li\u003e\n    \u003cli\u003eIncludes an impeller, impeller key, insert cup, wear plate, gaskets, O-rings, dowel pins, and pump fasteners.\u003c\/li\u003e\n    \u003cli\u003eDesigned for cooling-system service when the existing housing is reusable and within service limits.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eReference Numbers\u003c\/h2\u003e\n  \u003cp\u003eThese numbers are manufacturer or aftermarket catalog references associated with this water-pump kit family. They are provided for identification only; verify the application against your engine before installation.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Reference Numbers\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n\u003cth\u003eApplication Note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n\u003ctd\u003eWater-pump kit reference used on selected Yamaha 2-stroke applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A4-00\u003c\/td\u003e\n\u003ctd\u003eWater-pump repair-kit reference used on selected Yamaha 4-stroke applications.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3396-1\u003c\/td\u003e\n\u003ctd\u003eAftermarket catalog reference associated with the Yamaha water-pump kit family; confirm housing configuration before purchase.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-48618\u003c\/td\u003e\n\u003ctd\u003eAftermarket catalog reference; application and contents should be verified against the original part.\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 Compatibility\u003c\/h2\u003e\n  \u003cp\u003eCatalog records associate the 61A-W0078-A3-00 reference with selected Yamaha 2-stroke engines, including examples from the 150, 175, and 200 hp families. The 61A-W0078-A4-00 reference is documented on selected Yamaha 4-stroke engines, including F150 and F175 variants. The examples below are not a substitute for model and serial-number verification.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Documented Yamaha Compatibility Examples\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModel Example\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eYear Example\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\u003e150TJRV, 150TLRV, C150TLRV, L150TXRV, S150TLRV\u003c\/td\u003e\n\u003ctd\u003e150\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1997\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e200TLRV, L200TXRV, S200TXRV\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e1997\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A2-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eLZ150TXRY, VZ150TLRY, Z150TLRY, Z150TXRY\u003c\/td\u003e\n\u003ctd\u003e150\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eLZ200TXRY, Z200TLRY, Z200TXRY\u003c\/td\u003e\n\u003ctd\u003e200\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2000\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e150TXRZ, LX150TXRZ, LZ150TXRZ, SX150TXRZ, VX150TLRZ, VZ150TLRZ\u003c\/td\u003e\n\u003ctd\u003e150\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e2001\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A3-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF150JB, F150LB, F150LB2, F150LCA, F150LCA2, F150XB, F150XB2, F150XCA, F150XCA2\u003c\/td\u003e\n\u003ctd\u003e150\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2021\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A4-00\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eF175LA\u003c\/td\u003e\n\u003ctd\u003e175\u003c\/td\u003e\n\u003ctd\u003e4-Stroke\u003c\/td\u003e\n\u003ctd\u003e2021\u003c\/td\u003e\n\u003ctd\u003e61A-W0078-A4-00\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 references above occur in different Yamaha model, year, and configuration records. Do not treat a horsepower-only match as confirmed fitment. Check the original pump reference and compare the existing parts before ordering.\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\u003eHousing\u003c\/dt\u003e\n\u003cdd\u003eNot included; supplied without water-pump housing\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eReplacement service part for selected Yamaha outboards\u003c\/dd\u003e\n    \u003cdt\u003eReference Numbers\u003c\/dt\u003e\n\u003cdd\u003e61A-W0078-A3-00 and 61A-W0078-A4-00\u003c\/dd\u003e\n    \u003cdt\u003eConstruction\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement components\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 x Insert cup \/ cartridge insert, Yamaha reference 61A-44322-02-00\u003c\/li\u003e\n    \u003cli\u003e1 x Water-pump gasket, Yamaha reference 6E5-44315-A0-00\u003c\/li\u003e\n    \u003cli\u003e1 x Impeller, Yamaha reference 6E5-44352-01-00\u003c\/li\u003e\n    \u003cli\u003e1 x Wear plate \/ cartridge outer plate, Yamaha reference 6G5-44323-01-00\u003c\/li\u003e\n    \u003cli\u003e4 x Pump bolts with washers\u003c\/li\u003e\n    \u003cli\u003e1 x Woodruff key, Yamaha reference 90280-04M05-00\u003c\/li\u003e\n    \u003cli\u003e1 x O-ring, Yamaha reference 93210-37M67-00\u003c\/li\u003e\n    \u003cli\u003e1 x O-ring, Yamaha reference 93210-86M38-00\u003c\/li\u003e\n    \u003cli\u003e2 x Dowel pins, Yamaha reference 93606-12019-00\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eThe water-pump housing is not included. Reuse the original housing only after checking it for grooves, cracks, distortion, corrosion, and excessive wear.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and secure the outboard according to the manufacturer's service procedure.\u003c\/li\u003e\n    \u003cli\u003eRemove the lower unit and drain the gearcase lubricant as required by the service manual.\u003c\/li\u003e\n    \u003cli\u003eRemove the water-pump cover and take out the old impeller, key, gasket, insert, wear plate, O-rings, pins, and related hardware.\u003c\/li\u003e\n    \u003cli\u003eInspect the reusable housing and driveshaft. Do not install the kit if the housing is damaged or excessively worn.\u003c\/li\u003e\n    \u003cli\u003eClean all mating surfaces and install the new gasket, insert, wear plate, key, and impeller in the correct order.\u003c\/li\u003e\n    \u003cli\u003eRotate the driveshaft in the manufacturer's specified direction while seating the impeller vanes in the housing.\u003c\/li\u003e\n    \u003cli\u003eInstall the new O-rings, dowel pins, bolts, and washers. Tighten fasteners to the Yamaha service-manual specification for the exact engine.\u003c\/li\u003e\n    \u003cli\u003eReinstall the lower unit, aligning the driveshaft, shift shaft, and water tube correctly.\u003c\/li\u003e\n    \u003cli\u003eRefill the gearcase with the specified marine lubricant.\u003c\/li\u003e\n    \u003cli\u003eRun the engine only with an adequate water supply and confirm a steady tell-tale stream and normal operating temperature.\u003c\/li\u003e\n  \u003c\/ol\u003e\n  \u003cp\u003eAlways use the service manual for the exact engine model, serial range, torque values, sealants, and adjustment procedures.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm fitment?\u003c\/summary\u003e\n    \u003cp\u003eCompare the complete engine model, year, stroke, shaft configuration, and original water-pump reference with the compatibility information. The strongest confirmation is a match to 61A-W0078-A3-00 or 61A-W0078-A4-00 together with the correct pump configuration. Horsepower alone is not sufficient.\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\u003eNo. This listing is for a repair kit without the housing. The original housing must be inspected and reused only if it is serviceable.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the symptoms of a worn water pump?\u003c\/summary\u003e\n    \u003cp\u003eCommon symptoms include a weak or intermittent tell-tale stream, overheating alarms, steam, elevated operating temperature, or a damaged, brittle, or cracked impeller.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use the kit on any Yamaha 75–300 hp engine?\u003c\/summary\u003e\n    \u003cp\u003eNo. The kit is not confirmed for every Yamaha engine in that horsepower range. Yamaha water-pump parts vary by model, year, stroke, shaft configuration, and serial range. Verify the exact application before purchase.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM Yamaha kit?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement kit. Yamaha reference numbers are used only to identify the intended application and cross-reference the original service parts.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should the impeller be serviced?\u003c\/summary\u003e\n    \u003cp\u003eInspect the water pump according to the engine manufacturer's maintenance schedule. Replace the impeller sooner when the engine operates in saltwater, sand, silt, or other abrasive conditions, or whenever overheating or reduced tell-tale flow occurs.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I install it without a service manual?\u003c\/summary\u003e\n    \u003cp\u003eProfessional installation is recommended. Correct assembly, torque, sealants, lower-unit alignment, and post-installation cooling-system testing depend on the exact engine model.\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\u003eConfirm the engine model, year, stroke, serial range, and original part reference before ordering.\u003c\/li\u003e\n    \u003cli\u003eDo not install the kit if the pump housing, driveshaft, or mating surfaces are damaged or outside service limits.\u003c\/li\u003e\n    \u003cli\u003eNever run an outboard without an adequate water supply.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement part and is not manufactured by Yamaha.\u003c\/li\u003e\n    \u003cli\u003eUse the exact manufacturer's torque and maintenance specifications for your engine.\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 supply aftermarket components for routine marine maintenance and repair.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Information\u003c\/strong\u003e — Reference numbers and compatibility details are provided to help match the correct service part.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSupport for Maintenance Work\u003c\/strong\u003e — Review the complete engine information and contact support if you need help comparing the original part.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723783377211,"sku":"23KY723","price":100.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha_F75_to_F100_61A-W0078-00_-_JLM_MARINE-8289416.jpg?v=1763031674"}],"url":"https:\/\/seasierra.com\/collections\/yamaha-4-stroke-outboard-engine-75-300hp-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}