{"title":"Yamaha 4-6HP 2-Stroke Outboard Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page covers Yamaha 2-Stroke 4–6HP outboard engines and helps you find compatible parts and service information. Below you’ll find maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Yamaha collection. Scroll to the bottom of the 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; padding:10px 16px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Yamaha Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\"\u003e\n  \u003ch2\u003eHow to Identify Your 4–6HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate location: Look on the starboard side transom bracket or swivel bracket for the model\/serial plate and stamped number.\u003c\/li\u003e\n    \u003cli\u003eModel code \u0026amp; suffix: Yamaha codes include letters\/numbers for series and revisions. Suffix letters typically indicate shaft length (S = 15\" short, L = 20\" long) and configuration (tiller\/remote). A trailing letter often maps to a year code.\u003c\/li\u003e\n    \u003cli\u003e2‑Stroke confirmation: 2‑strokes typically require 50:1 premix fuel (or have an oiling label) and do not have a crankcase oil dipstick like 4‑strokes.\u003c\/li\u003e\n    \u003cli\u003ePlatform clues: 4HP models are often single‑cylinder; 5–6HP models are commonly twin‑cylinder. Count plug leads and carb orientation to help differentiate.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eYamaha 4HP 2‑Stroke Portable\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eSingle‑cylinder, carbureted 2‑Stroke, manual start, tiller steer (typical).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e4HP 2‑Stroke portable series (e.g., early “4A\/4B” style models; short\/long shaft variants).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eVery light weight and simple to service; great for dinghies and small tenders.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eUse fresh 50:1 premix with TC‑W3 oil. Many wear parts cross over with 5–6HP siblings, but verify by model code\/serial.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eYamaha 5–6HP 2‑Stroke Portable\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eTwin‑cylinder, carbureted 2‑Stroke; manual start with tiller steer common; short (S) and long (L) shafts available.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e5–6HP 2‑Stroke series such as 6A\/6B\/6G1\/6M8 portable families spanning multiple year codes.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eGood torque for size, easy parts availability, straightforward seasonal service.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eMany cooling and gearcase components interchange across years, but always match by model\/serial and shaft length.\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\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Yamaha 2‑Stroke 4–6HP outboards. Always follow the official Yamaha service manual for your exact model\/year and 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 #e5e7eb;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eChange after water intrusion or submersion; check for metal on drain plug.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\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 0;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eInspect every 50 hours; replace ~100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eUse correct heat range and gap; replace if fouled or worn.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\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 0;\"\u003eInline fuel filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e50–100 hours or as needed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eReplace if contaminated; keep water out of the tank.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\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 0;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eEvery 100 hours or 1–2 seasons\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eShorter intervals in sandy\/silty water or if tell‑tale weak.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\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 0;\"\u003eAnodes (zincs)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eInspect every 50 hours; replace when ~50% gone\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eUse the correct alloy for fresh\/salt\/brackish water.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\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 0;\"\u003e2‑Stroke fuel\/oil mix\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eEvery fill‑up\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eUse fresh gasoline with TC‑W3 oil at the ratio specified for your model (commonly 50:1). If oil‑injected, inspect pump\/lines per manual.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\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 0;\"\u003eCarburetor service\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eAs needed \/ layup\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eClean jets and passages if hard starting or surging; stabilize fuel for storage.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/carburetor\"\u003eCarburetors\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\"\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\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; 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; Hubs – \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  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eWeak tell‑tale stream \/ overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eInspect intake screen, flush passages, verify impeller condition, confirm thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eWater pump kit, intake screen, thermostat, gaskets\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eCheck for fouled plugs, dirty carb jets, restricted fuel filter, damaged prop or wrong pitch.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eSpark plugs, carburetor kit, fuel filter, propeller\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eUse fresh fuel, verify choke\/enrichment, set idle mixture, inspect plug gap and compression.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eCarburetor kit, spark plugs, fuel line\/filter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eExcessive smoke (2‑Stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eConfirm correct oil ratio, choke not stuck on, carb not flooding; replace old fuel.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eFuel system parts, carburetor components, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eGearcase noise \/ metal in oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eDrain and inspect gear oil; check for water; pressure test gearcase; inspect seals and bearings.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px 0;\"\u003eLower unit seal kit, bearings, shims, gear oil\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\"\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\u003eMany wear items for Yamaha 2‑Stroke 4–6HP portables carry across multiple years and series, but there are exceptions by model code, shaft length, and revision. Always match parts using the exact model code and serial number on the nameplate.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the water pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eReplace the impeller every 100 hours or 1–2 seasons, sooner for sandy\/silty use or if the tell‑tale is weak. Always inspect the housing, wear plate, and key during service.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the gear oil?\u003c\/summary\u003e\n    \u003cp\u003eChange lower unit gear oil every 100 hours or annually, and any time you suspect water intrusion or after an impact or submersion event.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003ePlease provide the full model code and serial number from the nameplate, shaft length (S\/L), tiller or remote control, approximate year range, and whether the engine is 2‑Stroke or 4‑Stroke.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year and model? Browse our main Yamaha collection to locate compatible components for your 2‑Stroke 4–6HP outboard.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/yamaha-outboard-parts\" style=\"display:inline-block; padding:10px 16px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Yamaha Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#374151;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"water-pump-impeller-kit-fits-yamaha-4hp-5hp-2-stroke-f4-f5-f6-4-stroke-replaces-6e0-w0078-a2-00-18-3410","title":"Yamaha 4HP\/5HP 2-Stroke Water Pump Repair Kit with Housing – Replaces 6E0-W0078-A2-00","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 {\n    padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n  }\n  table.ss-table th {\n    white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; 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\u003csection\u003e\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 4HP and 5HP 2-stroke outboards. It provides the principal components required to service the water pump and restore dependable cooling-water circulation when the existing impeller and related pump parts are worn.\u003c\/p\u003e\n  \u003cp\u003eThe primary Yamaha reference associated with this kit is \u003cstrong\u003e6E0-W0078-A2-00\u003c\/strong\u003e. Yamaha parts-catalog occurrences identify this water pump repair kit on selected 4HP and 5HP 2-stroke models, including 1996 4MLHU, 4MLHU2, 4MSHU, 4MSHU2, 5MLHU, 5MLHU2, 5MSHU, and 5MSHU2 applications.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eWater pump repair kit supplied with a pump housing.\u003c\/li\u003e\n    \u003cli\u003eSuitable for selected Yamaha 4HP and 5HP 2-stroke outboards.\u003c\/li\u003e\n    \u003cli\u003eIntended for replacement of worn water-pump service components.\u003c\/li\u003e\n    \u003cli\u003eVerify the exact model, year, and existing part number before ordering.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number References\u003c\/h2\u003e\n  \u003cp\u003eThe following references are catalog or aftermarket identifiers associated with this product family. They should not be treated as universally interchangeable without confirming the engine application.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n          \u003cth\u003eReference Status\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\u003e6E0-W0078-A2-00\u003c\/td\u003e\n          \u003ctd\u003ePrimary catalog reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003e6E0-W0078-A3-00\u003c\/td\u003e\n          \u003ctd\u003eRelated catalog variant; confirm exact model and year\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003e6E0-W0078-02-00\u003c\/td\u003e\n          \u003ctd\u003eCatalog occurrence on selected 1984 applications; not a universal interchange claim\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 Sierra 18-3410 is listed in the Sierra catalog as a different Yamaha water-pump kit associated with Yamaha 68T-W0078-00-00. It is not presented here as a confirmed equivalent for this product.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eFitment must be confirmed using the complete engine model and year. Horsepower alone is not sufficient because Yamaha water-pump components can vary by model generation and application.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel Examples\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eYear\u003c\/th\u003e\n          \u003cth\u003eCatalog Reference\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\u003e4MLHU, 4MLHU2, 4MSHU, 4MSHU2\u003c\/td\u003e\n          \u003ctd\u003e4\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1996\u003c\/td\u003e\n          \u003ctd\u003e6E0-W0078-A2-00\u003c\/td\u003e\n          \u003ctd\u003eCatalog-listed repair-kit applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003e5MLHU, 5MLHU2, 5MSHU, 5MSHU2\u003c\/td\u003e\n          \u003ctd\u003e5\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1996\u003c\/td\u003e\n          \u003ctd\u003e6E0-W0078-A2-00\u003c\/td\u003e\n          \u003ctd\u003eCatalog-listed repair-kit applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003e4MLHV, 4MSHV, 5MLHV, 5MSHV\u003c\/td\u003e\n          \u003ctd\u003e4–5\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1997\u003c\/td\u003e\n          \u003ctd\u003e6E0-W0078-A3-00\u003c\/td\u003e\n          \u003ctd\u003eRelated catalog variant; verify before purchase\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eYamaha\u003c\/td\u003e\n          \u003ctd\u003e4MLHW, 4MSHW, 5MLHW, 5MSHW\u003c\/td\u003e\n          \u003ctd\u003e4–5\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e1998\u003c\/td\u003e\n          \u003ctd\u003e6E0-W0078-A3-00\u003c\/td\u003e\n          \u003ctd\u003eRelated catalog variant; verify before purchase\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp\u003eThe available catalog evidence does not confirm fitment for Yamaha F4, F5, or F6 4-stroke engines. Those models have been removed from the confirmed compatibility claims for this listing.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003eWater pump repair kit with housing\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n    \u003cdd\u003eSelected Yamaha 4HP and 5HP 2-stroke outboards\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eDirect replacement when the exact engine application is confirmed\u003c\/dd\u003e\n    \u003cdt\u003ePrimary Yamaha Reference\u003c\/dt\u003e\n    \u003cdd\u003e6E0-W0078-A2-00\u003c\/dd\u003e\n    \u003cdt\u003eConstruction\u003c\/dt\u003e\n    \u003cdd\u003eRubber impeller with metal and molded water-pump service components\u003c\/dd\u003e\n    \u003cdt\u003eFunction\u003c\/dt\u003e\n    \u003cdd\u003eRestores water-pump service components used for engine cooling\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\u003eThis is a water-pump repair kit supplied with a housing. The exact component configuration can vary by application and production version, so compare the supplied parts with the pump assembly on your engine before installation.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eWater-pump impeller\u003c\/li\u003e\n    \u003cli\u003eWater-pump housing and related pump components\u003c\/li\u003e\n    \u003cli\u003eWear or impeller plate, where specified for the application\u003c\/li\u003e\n    \u003cli\u003eImpeller key, gasket, seals, and installation hardware as applicable to the kit configuration\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\u003eConfirm the complete engine model, year, stroke, and existing water-pump reference before disassembly.\u003c\/li\u003e\n    \u003cli\u003eStop the engine, remove the ignition key, disconnect the battery where applicable, and allow the engine to cool.\u003c\/li\u003e\n    \u003cli\u003ePlace the engine securely in a suitable service position and remove the lower unit according to the manufacturer's service procedure.\u003c\/li\u003e\n    \u003cli\u003eRemove the water-pump housing and inspect the impeller, wear surfaces, key, seals, and mating faces.\u003c\/li\u003e\n    \u003cli\u003eClean old gasket material and debris from all sealing surfaces.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement components in the same orientation as the removed parts. Make sure the impeller key is fully seated.\u003c\/li\u003e\n    \u003cli\u003eApply only the lubricant recommended by the engine manufacturer and avoid contaminating gasket or sealing surfaces.\u003c\/li\u003e\n    \u003cli\u003eReassemble the pump and lower unit using the manufacturer's tightening sequence and torque specifications.\u003c\/li\u003e\n    \u003cli\u003eRun the engine in a suitable test tank or water source and confirm a steady cooling-water telltale stream before normal operation.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm that this kit fits my Yamaha engine?\u003c\/summary\u003e\n    \u003cp\u003eCompare the complete Yamaha model code and model year with the compatibility information above, and compare the existing water-pump reference with the listed catalog reference. Do not rely on horsepower alone. If the model, year, stroke, or pump design differs, confirm the application before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the signs of a worn water-pump impeller?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs include a weak or interrupted telltale stream, overheating at idle or low speed, reduced cooling-water flow, or a brittle, cracked, melted, or deformed impeller during inspection.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should the water-pump components be inspected?\u003c\/summary\u003e\n    \u003cp\u003eInspect the water pump at the interval recommended for your engine and whenever the engine has been operated in sandy, silty, weedy, or saltwater conditions. Replace damaged or hardened components promptly.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this kit include a housing?\u003c\/summary\u003e\n    \u003cp\u003eYes. This listing is described as a water-pump repair kit with housing. Because component configurations can vary by application, compare the product contents with your original pump assembly before installation.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM Yamaha part?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement kit intended for the listed Yamaha applications. Yamaha and other brand names and part numbers are used only to identify compatibility references.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use this kit on a Yamaha F4, F5, or F6 4-stroke?\u003c\/summary\u003e\n    \u003cp\u003eFitment for those 4-stroke models is not confirmed by the available catalog evidence for this listing. Confirm the exact engine model and water-pump reference before purchasing.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat if my original part looks different?\u003c\/summary\u003e\n    \u003cp\u003eDo not install the kit if the housing, impeller, keyway, sealing surfaces, or other critical components differ from your original assembly. Confirm the exact model and application with a qualified marine technician.\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 complete engine model, year, stroke, and existing part number before ordering.\u003c\/li\u003e\n    \u003cli\u003eDo not treat a number appearing in a cross-reference list as proof of universal interchangeability.\u003c\/li\u003e\n    \u003cli\u003eUse the manufacturer's service manual for disassembly, torque, sealing, and testing procedures.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended if you are not experienced with outboard lower-unit or water-pump service.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM Yamaha component.\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-Focused Selection\u003c\/strong\u003e — Replacement parts selected for common outboard maintenance and repair applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication-Conscious Fitment\u003c\/strong\u003e — We recommend checking the complete model and part-number information before ordering.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eService Support\u003c\/strong\u003e — Clear product information helps you select the correct maintenance component for your engine.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723976413499,"sku":"23KY701","price":52.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_for_Yamaha__4_-_5_HP_2-stroke_F4_-_F5_-_F6_1_cyl_4-stroke_6E0-W0078-00_-_JLM_MARINE-8289259.jpg?v=1763039027"},{"product_id":"water-pump-impeller-fits-yamaha-4-6-hp-replaces-6e0-44352-00","title":"Water Pump Impeller for Yamaha 4–6 HP Outboards – Replaces 6E0-44352-00","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 impeller\u003c\/strong\u003e is designed for specified Yamaha 4–6 HP outboards, including selected 2-stroke 4A, 4B, and 5C models and 4-stroke F4A, F4B, F5A, and F6C models. It is also listed for Mariner 4A and 5C 2-stroke applications. Always compare your original impeller and OEM part number before ordering.\u003c\/p\u003e\n\u003cp\u003eThe impeller is a direct replacement reference for Yamaha \u003cstrong\u003e6E0-44352-00\u003c\/strong\u003e and \u003cstrong\u003e6E0-44352-00-00\u003c\/strong\u003e. Additional aftermarket reference numbers include Sierra \u003cstrong\u003e18-3073\u003c\/strong\u003e, Mallory \u003cstrong\u003e9-45611\u003c\/strong\u003e, GLM \u003cstrong\u003e89860\u003c\/strong\u003e, and Mercury Marine \u003cstrong\u003e47-96305M\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eReplacement water pump impeller for selected small Yamaha and Mariner outboards.\u003c\/li\u003e\n  \u003cli\u003eSix-blade design for the specified water pump application.\u003c\/li\u003e\n  \u003cli\u003eManufactured to the listed replacement dimensions for proper pump fit and cooling-system operation.\u003c\/li\u003e\n  \u003cli\u003eSold as a single impeller; confirm all required installation hardware against your original water pump assembly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the following numbers as cross-reference information only. Confirm the exact engine model and water pump configuration before installation.\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\u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E0-44352-00\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003e6E0-44352-00-00\u003c\/td\u003e\n\u003ctd\u003eOEM reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e47-96305M\u003c\/td\u003e\n\u003ctd\u003eAftermarket\/OEM cross-reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3073\u003c\/td\u003e\n\u003ctd\u003eAftermarket reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-45611\u003c\/td\u003e\n\u003ctd\u003eAftermarket reference\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e89860\u003c\/td\u003e\n\u003ctd\u003eAftermarket reference\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\u003eThe company fitment records identify the following applications. Model, horsepower, and stroke conditions should be treated together; do not rely on horsepower alone.\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\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eOEM 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\u003e4A, 4B\u003c\/td\u003e\n        \u003ctd\u003e4\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e6E0-44352-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003e5C\u003c\/td\u003e\n        \u003ctd\u003e5\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e6E0-44352-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e4A\u003c\/td\u003e\n        \u003ctd\u003e4\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e47-96305M\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e5C\u003c\/td\u003e\n        \u003ctd\u003e5\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e47-96305M\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF4A, F4B\u003c\/td\u003e\n        \u003ctd\u003e4\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e6E0-44352-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF5A\u003c\/td\u003e\n        \u003ctd\u003e5\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e6E0-44352-00-00\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eF6C\u003c\/td\u003e\n        \u003ctd\u003e6\u003c\/td\u003e\n        \u003ctd\u003e4-Stroke\u003c\/td\u003e\n        \u003ctd\u003e6E0-44352-00-00\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\u003c\/dd\u003e\n  \u003cdt\u003eProduct Configuration\u003c\/dt\u003e\n  \u003cdd\u003eSingle impeller\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n  \u003cdd\u003eRubber impeller\u003c\/dd\u003e\n  \u003cdt\u003eOutside Diameter\u003c\/dt\u003e\n  \u003cdd\u003e1.540 in\u003c\/dd\u003e\n  \u003cdt\u003eBore Diameter\u003c\/dt\u003e\n  \u003cdd\u003e0.415 in\u003c\/dd\u003e\n  \u003cdt\u003eThickness\u003c\/dt\u003e\n  \u003cdd\u003e0.485 in\u003c\/dd\u003e\n  \u003cdt\u003eKey Dimension Reference\u003c\/dt\u003e\n  \u003cdd\u003e0.155 in\u003c\/dd\u003e\n  \u003cdt\u003eNumber of Blades\u003c\/dt\u003e\n  \u003cdd\u003e6\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 impeller\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eDisconnect the spark plug wire(s), place the outboard in neutral, and follow the service manual safety instructions.\u003c\/li\u003e\n  \u003cli\u003eRemove the lower unit from the driveshaft housing according to the engine manufacturer’s procedure.\u003c\/li\u003e\n  \u003cli\u003eRemove the water pump housing cover and expose the existing impeller.\u003c\/li\u003e\n  \u003cli\u003eBefore removal, note the impeller blade orientation and inspect the keyway, pump housing, wear plate, gaskets, and related hardware.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller and clean the mating surfaces. Replace worn gaskets or damaged pump components as required.\u003c\/li\u003e\n  \u003cli\u003eInstall the impeller using the correct key or drive pin for your specific engine. Do not reuse damaged hardware.\u003c\/li\u003e\n  \u003cli\u003eApply a light water-compatible lubricant or soap-and-water solution to the impeller and pump housing to prevent damage during initial rotation. Avoid starting the engine dry.\u003c\/li\u003e\n  \u003cli\u003eReinstall the pump housing and related components, tightening fasteners to the manufacturer’s specified torque.\u003c\/li\u003e\n  \u003cli\u003eReattach the lower unit and test the engine in water. Confirm a steady tell-tale stream and monitor for overheating.\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 impeller needs replacing?\u003c\/summary\u003e\n  \u003cp\u003eCommon signs include a weak or missing tell-tale stream, overheating, reduced cooling-water flow, or visible cracking, stiffness, melting, or damaged blades. An impeller should also be inspected when the water pump is serviced.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eDoes this listing include a key, gasket, or complete water pump kit?\u003c\/summary\u003e\n  \u003cp\u003eNo. This product is listed as a single water pump impeller. The box contents do not identify a key, gasket, housing, wear plate, or complete repair kit. Check your original assembly and obtain any additional parts required for your specific engine separately.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eWill this fit my engine if the model is not listed?\u003c\/summary\u003e\n  \u003cp\u003eDo not assume fitment. Confirm the complete engine model, horsepower, stroke, year or serial range when applicable, and OEM part number. The listed references are not a substitute for checking the exact water pump configuration.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs lubrication needed during installation?\u003c\/summary\u003e\n  \u003cp\u003eUse a light water-compatible lubricant or soap-and-water solution during installation to help protect the blades during initial rotation. Never operate the engine without an adequate water supply.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n  \u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n  \u003cp\u003eThis listing is for an aftermarket replacement impeller, not a Yamaha or Mercury branded OEM component. The displayed OEM and aftermarket numbers are reference numbers used for identification and compatibility checking.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eVerify the original impeller dimensions, blade count, keyway, and part number before purchase.\u003c\/li\u003e\n  \u003cli\u003eKeep the Yamaha 2-stroke and 4-stroke model conditions separate when confirming fitment.\u003c\/li\u003e\n  \u003cli\u003eReplace damaged pump components and gaskets as needed; a worn housing or wear plate can affect cooling performance.\u003c\/li\u003e\n  \u003cli\u003eDo not run the outboard dry. Test the cooling system in water or with the manufacturer-approved flushing equipment.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended if you are unfamiliar 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 replacement components for common outboard maintenance needs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Fitment information is organized by engine brand, model, horsepower, and stroke.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClear Cross-References\u003c\/strong\u003e — OEM and aftermarket reference numbers are provided to support careful part identification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723976446267,"sku":"17IY015","price":14.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_for_Yamaha_4-5-6_HP_6E0-44352-00_-_JLM_MARINE-8288702.jpg?v=1763039029"}],"url":"https:\/\/seasierra.com\/collections\/yamaha-4-6hp-2-stroke-outboard-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}