{"title":"Evinrude 2-Stroke Outboard Engine 30-70HP Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp style=\"max-width:900px;\"\u003e\n    This page is for Evinrude 2-Stroke Outboard Engine 30-70HP models. Use it to find compatible parts and essential service information. Below you’ll find maintenance tips, common replacement categories, and troubleshooting guidance. You can also browse the main Johnson\/Evinrude\/OMC collection anytime. Scroll to the bottom of this page to start browsing parts for your engine, and remember you can use the Filter \u0026amp; Sort controls on the collection page to narrow results by horsepower, year range, and part category.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-outboard-parts\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0b6;border-radius:6px;text-decoration:none;\"\u003eBrowse All Johnson\/Evinrude\/OMC Parts\u003c\/a\u003e\n  \u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:10px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 30–70HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the nameplate\/serial plate on the transom bracket or swivel bracket. The model code and serial number are stamped on this tag.\u003c\/li\u003e\n    \u003cli\u003eRead the model code: prefixes like J (Johnson) or E (Evinrude) are followed by horsepower (e.g., 70) and suffix letters that indicate shaft length (S\/L\/X), electric start (E), trim\/tilt (T), and year code.\u003c\/li\u003e\n    \u003cli\u003e2‑Stroke identification: these engines are carbureted; many use a VRO\/oil‑injection system. Some 30HP units are inline‑2, while most 40–70HP are inline‑3.\u003c\/li\u003e\n    \u003cli\u003eRecord the full model and serial before ordering; small suffix differences affect ignition, carburetion, and wiring compatibility.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:10px 0;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003eInline‑2 (Approx. 30 HP) – Carbureted 2‑Stroke\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eInline‑2, carbureted 2‑stroke with premix or VRO oil‑injection, rope or electric start depending on suffix.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eEvinrude\/Johnson 30HP 2‑stroke variants (model codes typically include 30 and suffix letters for year\/shaft\/control).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eLightweight and simple; easy service access; good portability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eCarburetor size and ignition components vary by year; confirm model suffix before ordering coils, stators, or carb parts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eInline‑3 (Approx. 40–70 HP) – Carbureted 2‑Stroke\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;max-width:900px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eInline‑3, carbureted 2‑stroke; many components (ignition, linkages) share design across 40–70HP families in the late 1980s–early 2000s.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eJohnson\/Evinrude 40\/50\/60\/65\/70HP 2‑stroke models; model IDs often start with J or E + horsepower, followed by trim\/shaft\/year suffix letters.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eStrong mid‑range torque, straightforward carb service, widely available ignition and rigging parts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eThrottle cam\/linkage, timing base, stator\/coil, and wiring harnesses may interchange across years within the family—verify by model code and connector style.\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:10px 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for typical use; always follow the official service manual for your exact model and operating conditions.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;max-width:1000px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eInspect magnetic drain plug for metal; check for water intrusion (milky oil).\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/service-maintenance-kits\"\u003eService \u0026amp; Maintenance Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eReplace or clean\/gap as specified; fouling is common with rich mix or extended idling.\u003c\/td\u003e\n        \u003ctd\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\u003eFuel filter \/ inline filter\u003c\/td\u003e\n        \u003ctd\u003eInspect every 50 hours; replace annually\u003c\/td\u003e\n        \u003ctd\u003eReplace sooner if debris or phase‑separated fuel is found.\u003c\/td\u003e\n        \u003ctd\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\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd\u003eEvery 2–3 seasons (annually in sandy\/silty water)\u003c\/td\u003e\n        \u003ctd\u003eWeak tell‑tale stream or overheat alarm indicates immediate service.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-water-pump-repair-kits\"\u003eJohnson\/Evinrude\/OMC Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAnodes (zincs)\u003c\/td\u003e\n        \u003ctd\u003eInspect every 50 hours; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd\u003eEssential for corrosion protection, especially in brackish\/salt water.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-anodes\"\u003eJohnson\/Evinrude\/OMC Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eThermostat \u0026amp; gasket\u003c\/td\u003e\n        \u003ctd\u003eInspect annually; replace as needed\u003c\/td\u003e\n        \u003ctd\u003eStuck‑open stats cause cold running and excess smoke; stuck‑closed can overheat.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-gaskets\"\u003eJohnson\/Evinrude\/OMC Gaskets\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003e2‑Stroke oiling (premix or VRO)\u003c\/td\u003e\n        \u003ctd\u003eCheck each service\u003c\/td\u003e\n        \u003ctd\u003eVerify correct premix ratio or test VRO output; inspect oil lines and filters for air leaks.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-hoses\"\u003eJohnson\/Evinrude\/OMC Hoses\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePropeller \u0026amp; hardware\u003c\/td\u003e\n        \u003ctd\u003eInspect each outing\u003c\/td\u003e\n        \u003ctd\u003eCheck for dings, spun hub symptoms, and fishing line at seals.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-propellers\"\u003eJohnson\/Evinrude\/OMC 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:10px 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service — \u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-service-maintenance-kits\"\u003eJohnson\/Evinrude\/OMC Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System — \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-water-pump-repair-kits\"\u003eWater Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System — \u003ca href=\"https:\/\/seasierra.com\/collections\/carburetor\"\u003eCarburetor\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical — \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eLower Unit \u0026amp; Seals — \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-lower-unit-seal-kits\"\u003eLower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection — \u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropellers \u0026amp; Hardware — \u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-propellers\"\u003ePropellers\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:10px 0;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%;max-width:1000px;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ccc;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eWeak tell‑tale stream \/ overheat alarm\u003c\/td\u003e\n        \u003ctd\u003eInspect intake screens for blockage; check tell‑tale hose for kinks; evaluate impeller and thermostat.\u003c\/td\u003e\n        \u003ctd\u003eWater pump repair kit, thermostat, intake screen, tell‑tale hose\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd\u003eCheck prop damage or incorrect pitch; verify spark and plug condition; inspect fuel filter and carburetor jets\/synchronization.\u003c\/td\u003e\n        \u003ctd\u003ePropeller, spark plugs, carburetor rebuild kit, fuel filter, throttle cam\/linkage\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd\u003eConfirm choke\/primer operation; check for stale fuel; set idle mixture; inspect for air leaks at fuel lines and gaskets.\u003c\/td\u003e\n        \u003ctd\u003ePrimer\/choke solenoid, spark plugs, fuel filter, carb kit, intake gaskets\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eExcessive smoke (2‑stroke)\u003c\/td\u003e\n        \u003ctd\u003eVerify premix ratio or VRO output; ensure engine reaches proper temp (thermostat); avoid extended cold idling.\u003c\/td\u003e\n        \u003ctd\u003eOil injection lines\/hoses, fuel pump\/primer, thermostat\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise \/ metal in gear oil\u003c\/td\u003e\n        \u003ctd\u003eCheck fluid level\/condition; inspect for water intrusion; examine prop shaft seals and carrier bearings.\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, gear lube, prop shaft seals, water pump base gasket\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:10px 0;\"\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 ignition and rigging components interchange across inline‑3 Johnson\/Evinrude 40–70HP families from the late 1980s into the early 2000s, but verify by full model code, connector style, and year suffix before ordering. Inline‑2 30HP models often use different carburetion and ignition parts than the inline‑3 units.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should the water pump impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eReplace the impeller every 2–3 seasons under normal use, or annually if you boat in sand\/silt or see a weak tell‑tale stream or any overheat indication. Always service sooner if the engine ingests debris or the lower unit was disassembled.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eChange lower unit gear oil every 100 hours or once per season, and anytime the lower unit has been submerged or shows signs of water intrusion (milky oil). Inspect the magnetic drain plug for metal.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information helps confirm part compatibility?\u003c\/summary\u003e\n    \u003cp\u003eProvide the full model code and serial number, shaft length, control type (tiller\/remote), and year. Photos of the nameplate and the part or connector in question are also helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year, and model? Browse the main Johnson\/Evinrude\/OMC collection and use the filters to narrow your search.\u003c\/p\u003e\n  \u003cp\u003e\n    \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-outboard-parts\" style=\"display:inline-block;padding:10px 14px;border:1px solid #0b6;border-radius:6px;text-decoration:none;\"\u003eShop Johnson\/Evinrude\/OMC Parts\u003c\/a\u003e\n  \u003c\/p\u003e\n  \u003cp style=\"font-size:0.95em;color:#444;\"\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-mercury-mariner-johnson-evinrude-30-70hp-replaces-46-77177a3-water-pump-impeller-kit-fits-mercury-mariner-johnson-evinrude-30-70hp-replaces-46-77177a3","title":"Water Pump Impeller Kit Without Housing – Fits Mercury\/Mariner 30–70 HP Outboards, Replaces 46-77177A3","description":"\u003cstyle\u003e\n.ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\ntable.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\ntable.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\ntable.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n@media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis \u003cstrong\u003ewater pump impeller kit without housing\u003c\/strong\u003e is intended to service the water pump assembly on compatible Mercury and Mariner outboard engines in the 30–70 HP range. It helps restore water circulation and cooling performance when the existing pump housing remains serviceable.\u003c\/p\u003e\n\u003cp\u003eThe kit is listed as a replacement for Mercury Marine part number \u003cstrong\u003e46-77177A3\u003c\/strong\u003e. The pump housing is not included.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAftermarket replacement water pump impeller service kit.\u003c\/li\u003e\n\u003cli\u003eDesigned for use with the existing water pump housing and related reusable hardware.\u003c\/li\u003e\n\u003cli\u003eIncludes the service components listed below; quantities should be checked against the parts received before installation.\u003c\/li\u003e\n\u003cli\u003eWater pump housing is not included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number References\u003c\/h2\u003e\n\u003cp\u003eUse the following reference to compare your original part before ordering. Part-number references do not replace verification of the complete engine model, serial number, and pump configuration.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand or Reference\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e46-77177A3\u003c\/td\u003e\n\u003ctd\u003eWater pump repair-kit reference; housing not included with this listing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlternate format\u003c\/td\u003e\n\u003ctd\u003e77177A3\u003c\/td\u003e\n\u003ctd\u003eReference associated with the same base part number\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\u003eCatalog data associates part number 46-77177A3 with selected Mercury 30 HP and 40 HP applications, including model and serial-number conditions. Additional aftermarket references list the part across a broader 30–70 HP range. Because water-pump fitment can change by model, gearcase, serial number, and configuration, verify your exact engine application before installation.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Engine Compatibility Guidance\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eRated HP Range\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eModel \/ Serial Requirement\u003c\/th\u003e\n\u003cth\u003eFitment Note\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n\u003ctd\u003e30–70 HP\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eVerify exact model and serial number\u003c\/td\u003e\n\u003ctd\u003eUse the original part number and pump configuration for final confirmation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e30 HP\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eCatalog examples include 30 JET with serial ranges 0C159200–0G589999 and 9570790 and up\u003c\/td\u003e\n\u003ctd\u003eThese are catalog examples, not a complete application list\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMercury\u003c\/td\u003e\n\u003ctd\u003e40 HP\u003c\/td\u003e\n\u003ctd\u003eNot specified\u003c\/td\u003e\n\u003ctd\u003eCatalog examples include 40 (4 CYL.) with serial ranges 0C159200 and up and 9570790 and up\u003c\/td\u003e\n\u003ctd\u003eConfirm the exact serial range before ordering\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eWater pump impeller service kit\u003c\/dd\u003e\n\u003cdt\u003eHousing\u003c\/dt\u003e\n\u003cdd\u003eNot included\u003c\/dd\u003e\n\u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eReplacement service part; installation requires removal and reassembly of the applicable water pump components\u003c\/dd\u003e\n\u003cdt\u003ePrimary Reference\u003c\/dt\u003e\n\u003cdd\u003eMercury Marine 46-77177A3\u003c\/dd\u003e\n\u003cdt\u003eBrand Status\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement, not an OEM-branded component\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\u003cli\u003eGaskets and seals for the water pump service\u003c\/li\u003e\n\u003cli\u003e1 x Drive key\u003c\/li\u003e\n\u003cli\u003e1 x Face plate\u003c\/li\u003e\n\u003cli\u003e1 x Face seal\u003c\/li\u003e\n\u003cli\u003e1 x Seal carrier\u003c\/li\u003e\n\u003cli\u003e1 x Water tube coupling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot included:\u003c\/strong\u003e water pump housing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eComponent appearance and exact quantity may vary by production batch. Compare the supplied components with the original pump assembly and service-manual parts diagram before installation.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eDisconnect the battery and follow the engine manufacturer's safety procedures.\u003c\/li\u003e\n\u003cli\u003ePlace a drain pan under the lower unit. If required by the service procedure, drain the gearcase lubricant.\u003c\/li\u003e\n\u003cli\u003eRemove the gearcase according to the service-manual procedure, taking care to support the unit and protect the shift shaft, driveshaft, and water tube.\u003c\/li\u003e\n\u003cli\u003eRemove the water pump cover or housing and inspect the existing housing, wear surfaces, plate, and base for scoring, cracks, distortion, or heat damage.\u003c\/li\u003e\n\u003cli\u003eRemove the old impeller and drive key. Note the original vane direction before removal.\u003c\/li\u003e\n\u003cli\u003eClean the mating surfaces and install the replacement gaskets, seals, plate, key, and impeller supplied with the kit.\u003c\/li\u003e\n\u003cli\u003eInstall the impeller with the vanes oriented in the direction of engine rotation. Use an appropriate lubricant compatible with the impeller material.\u003c\/li\u003e\n\u003cli\u003eReinstall the existing pump housing only if it is in serviceable condition. Do not use a damaged or severely scored housing.\u003c\/li\u003e\n\u003cli\u003eReinstall the gearcase, aligning the driveshaft, shift shaft, and water tube. Tighten fasteners to the manufacturer's specifications.\u003c\/li\u003e\n\u003cli\u003eRefill the gearcase if it was drained, reconnect the battery, and test the engine with an appropriate water supply.\u003c\/li\u003e\n\u003cli\u003eConfirm a steady tell-tale stream and monitor for overheating or abnormal water-pressure indications.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eDoes this kit include the water pump housing?\u003c\/summary\u003e\n\u003cp\u003eNo. This listing is for an impeller service kit without the water pump housing. Reuse your existing housing only after confirming that it is not cracked, warped, melted, or excessively scored.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I confirm compatibility?\u003c\/summary\u003e\n\u003cp\u003eCompare the original part number, engine brand, horsepower, model, serial number, gearcase configuration, and water-pump diagram. The 30–70 HP range is a general application guide and is not a substitute for exact model and serial-number verification.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat are common signs of a failing impeller?\u003c\/summary\u003e\n\u003cp\u003eCommon signs include a weak or missing tell-tale stream, overheating warnings, reduced water pressure, or visible impeller damage. A blocked cooling passage, failed thermostat, worn plate, or damaged housing can cause similar symptoms.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow often should the impeller be inspected or replaced?\u003c\/summary\u003e\n\u003cp\u003eImpeller service intervals depend on the engine manufacturer's schedule and operating conditions. Inspect it regularly and replace it sooner when the engine is used in sandy, silty, salty, or debris-filled water.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill replacing the impeller correct an overheating engine?\u003c\/summary\u003e\n\u003cp\u003eA worn or damaged impeller can cause overheating, but it is not the only possible cause. If overheating continues after installation, inspect the housing, wear plate, thermostat, cooling passages, water tube, and water-pressure system.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this an OEM part?\u003c\/summary\u003e\n\u003cp\u003eNo. This is an aftermarket replacement kit intended to replace the referenced water-pump service part. It is not manufactured or branded by Mercury Marine.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerify the complete engine model and serial number before ordering.\u003c\/li\u003e\n\u003cli\u003eDo not rely on horsepower alone to determine fitment.\u003c\/li\u003e\n\u003cli\u003eInspect the existing housing and wear surfaces before installing a new impeller.\u003c\/li\u003e\n\u003cli\u003eFollow the engine service manual for disassembly, torque values, lubrication, and testing.\u003c\/li\u003e\n\u003cli\u003eProfessional installation is recommended when the lower unit or cooling system cannot be safely serviced by the owner.\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 maintenance and repair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication-Focused Support\u003c\/strong\u003e — Confirm the engine model, serial number, and original part before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eService-Ready Selection\u003c\/strong\u003e — Parts are selected for common marine maintenance and replacement applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723966648635,"sku":"21KM010","price":55.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Water_Pump_Impeller_Kit_without_Housing_for_Mercury_Mariner_-_BRP_Johnson_-_Evinrude_46-77177A3_-_JLM_MARINE-8290006.jpg?v=1763038640"}],"url":"https:\/\/seasierra.com\/collections\/evinrude-2-stroke-outboard-engine-30-70hp-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}