{"title":"Evinrude 2-Stroke Outboard Engine Parts 6-250HP","description":"\u003csection id=\"hero\" style=\"max-width:960px;margin:auto;padding:16px 12px;\"\u003e\n  \u003cp\u003eEvinrude 2‑Stroke 6–250HP outboard engines: this page helps you confirm compatible parts and service information for your motor. Below you’ll find maintenance intervals, frequently used replacement parts, and quick troubleshooting guidance. You can also browse our main Johnson\/Evinrude (OMC) collection. Scroll to the bottom of this page to start browsing parts for your engine. On the collection page, use the Filter \u0026amp; Sort controls to narrow results by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003cp\u003e\n    \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-outboard-parts\" style=\"display:inline-block;padding:10px 14px;background:#0a5;border-radius:4px;color:#fff;text-decoration:none;\"\u003eBrowse All Johnson\/Evinrude Parts\u003c\/a\u003e\n  \u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"max-width:960px;margin:auto;padding:12px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 6–250HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eFind the ID plate: typically on the transom bracket (starboard side) or inside the clamp bracket. It lists the model code and serial number.\u003c\/li\u003e\n    \u003cli\u003eRead the model code: suffix letters often indicate shaft length (S\/L\/XL), starting\/controls (manual\/electric, tiller\/remote), and production year or series.\u003c\/li\u003e\n    \u003cli\u003eConfirm platform: small 6–15HP are single\/twin-cylinder; 25–70HP are usually inline‑3; 75–140HP are V4; 150–250HP are V6. Count spark plugs\/cylinders and note cowl size to distinguish.\u003c\/li\u003e\n    \u003cli\u003e2‑Stroke specifics: verify whether your engine uses premix fuel or an oil‑injection system; this affects service parts and procedures.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"platforms\" style=\"max-width:960px;margin:auto;padding:12px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003ePortable \u0026amp; Small (6–15HP)\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 #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\u003eSingle or inline‑2 carbureted 2‑Stroke; manual or electric start; tiller or remote.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e6–9.9HP and 15HP 2‑Stroke families (short\/long shaft variants).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eLightweight, simple, easy to service; good portability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eImpeller and gearcase parts are model‑year specific; verify shaft length and gear ratio.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eMidrange (25–70HP)\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 #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 2‑Stroke, typically oil‑injected; manual\/auto choke\/enrichment depending on year.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e25\/30\/40\/50\/60\/70HP 2‑Stroke models across multiple years.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eStrong mid‑range torque and quick hole‑shot; broad parts availability.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eCarburetor, ignition, and control components vary by year\/serial; match by model code.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eV4 (75–140HP)\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 #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\u003eV4 carbureted or oil‑injected 2‑Stroke with CDI ignition.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eClassic 90–140HP 2‑Stroke V4 families (various shaft lengths and gearcases).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eProven design, serviceable, strong acceleration for mid‑size boats.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eWater pump kits and props depend on gearcase style; verify spline count and diameter.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eV6 (150–250HP)\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 #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\u003eV6 2‑Stroke, carbureted or direct‑injected depending on year; CDI\/ECU‑controlled ignition.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e150\/175\/200\/225\/250HP 2‑Stroke families across multiple generations.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eHigh output with strong top‑end; wide range of propeller options.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eCooling, ignition, and fuel components are year\/platform‑specific; use model\/serial to confirm parts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"max-width:960px;margin:auto;padding:12px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Evinrude 2‑Stroke outboards. Always follow the maintenance schedule and procedures in your official service manual.\u003c\/p\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #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 for water or metal; reseal if contamination is found.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-lower-unit-seal-kits\"\u003eLower Unit Seal 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\u003eCheck gap and replace fouled\/eroded plugs; keep a spare set onboard.\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 \/ water separator\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eReplace more often with ethanol fuel or contamination.\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 or kit\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or 1–2 seasons\u003c\/td\u003e\n        \u003ctd\u003eShorten interval in sandy\/silty or heavy‑use conditions.\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 (external\/internal)\u003c\/td\u003e\n        \u003ctd\u003eInspect often; replace when 50% depleted\u003c\/td\u003e\n        \u003ctd\u003eUse the correct alloy for your water (salt\/brackish\/fresh).\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\u003c\/td\u003e\n        \u003ctd\u003eInspect annually; replace as needed\u003c\/td\u003e\n        \u003ctd\u003eStuck thermostats cause overheating or cold‑running and excess smoke.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-outboard-parts\"\u003eJohnson\/Evinrude\/OMC Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eProp\/hub inspection\u003c\/td\u003e\n        \u003ctd\u003eSeasonally or if RPM spikes\u003c\/td\u003e\n        \u003ctd\u003eCheck for spun hub, dings, and correct pitch for load.\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      \u003ctr\u003e\n        \u003ctd\u003e2‑Stroke oil system\u003c\/td\u003e\n        \u003ctd\u003eEach season\u003c\/td\u003e\n        \u003ctd\u003ePremix ratio or oil‑injection health is critical; inspect hoses, filters, and bleed as required.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-outboard-parts\"\u003eJohnson\/Evinrude\/OMC Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n  \u003cp style=\"font-size:0.9em;color:#555;\"\u003e*Intervals are typical for recreational use; severe duty (towing, sandy water, prolonged idling) may require shorter intervals.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"max-width:960px;margin:auto;padding:12px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\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\u003eGearcase \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\u003ePropellers \u0026amp; Hubs: \u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-propellers\"\u003eJohnson\/Evinrude\/OMC Propellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-anodes\"\u003eJohnson\/Evinrude\/OMC Anodes\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 \u0026amp; \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\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGaskets \u0026amp; Sealing: \u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-gaskets\"\u003eJohnson\/Evinrude\/OMC Gaskets\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"max-width:960px;margin:auto;padding:12px;\"\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 #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 or overheat alarm\u003c\/td\u003e\n        \u003ctd\u003eInspect intake screens for blockage; verify thermostat operation; check impeller condition.\u003c\/td\u003e\n        \u003ctd\u003eWater pump kit, impeller, thermostat, gasket\/seal set\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd\u003eConfirm fresh fuel and correct oil mix; check prop for damage\/slip; inspect plugs and compression.\u003c\/td\u003e\n        \u003ctd\u003eSpark plugs, fuel filter, propeller\/hub, carb kit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd\u003ePrime fuel system; verify choke\/enrichment function; clean carburetors; check ignition spark strength.\u003c\/td\u003e\n        \u003ctd\u003eFuel pump\/bulb, carburetor kit, ignition coil\/CDI, spark plugs\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 oil‑injection output; confirm thermostat closes; look for stuck float\/over‑rich carb.\u003c\/td\u003e\n        \u003ctd\u003eOil lines\/filter, thermostat, carburetor needles\/seats, plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise or metal in oil\u003c\/td\u003e\n        \u003ctd\u003eDrain and inspect gear oil; check for water intrusion; examine prop shaft seals for fishing line damage.\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, bearings, gear lube, prop shaft seals\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"max-width:960px;margin:auto;padding:12px;\"\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 items (plugs, anodes, fuel filters) may cross multiple families, but many components—especially cooling, ignition, and gearcase parts—are year and platform specific. Always confirm by model and serial.\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\u003eTypically every 100 hours or 1–2 seasons, sooner in sandy\/silty water or if the tell‑tale weakens or the engine overheats.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should lower unit gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eChange every 100 hours or annually, and anytime you suspect impact or water intrusion. Inspect for metal flakes and milky color.\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, serial number, shaft length, and any known year or series. Photos of the nameplate and the part you are replacing are also helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"max-width:960px;margin:auto;padding:16px 12px;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year, and model? Browse the main Johnson\/Evinrude collection to filter down to your exact 2‑Stroke engine.\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;background:#0a5;border-radius:4px;color:#fff;text-decoration:none;\"\u003eShop Johnson\/Evinrude Outboard Parts\u003c\/a\u003e\n  \u003c\/p\u003e\n  \u003cp style=\"font-size:0.9em;color:#555;\"\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":"thermostat-fits-johnson-evinrude-6-250-hp-v4-v6-replaces-johnson-evinrude-5005440-434841","title":"143°F Marine Outboard Thermostat – Fits Mercury Mariner 135–200 HP EFI and Select Johnson\/Evinrude Models","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;\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\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis replacement \u003cstrong\u003e143°F (62°C) marine thermostat\u003c\/strong\u003e is a single thermostat for selected Mercury\/Mariner and Johnson\/Evinrude outboard applications. The company fitment data identifies Mercury\/Mariner 135–200 HP EFI applications and additional Johnson\/Evinrude applications including 40–250 HP E-TEC, 6–55 HP, crossflow V4 and V6 models, and 9.9 HP and 15 HP four-stroke models from 1994–2001.\u003c\/p\u003e\n  \u003cp\u003eFor Mercury\/Mariner applications, the company records also list selected models and serial ranges from 7.5 HP through V300\/3.4L, including 7.5 HP serial 5226935 and up, 9.8 HP serial 5206550 and up, 40 HP serial 3336258–C159199, 50\/60 HP serial D000750 and up, 65 HP serial 3547987–4571651, 70 HP serial 4571652–4825248, 70\/75\/80\/90 HP serial A996142 and up, 100\/115 HP serial B209468 and up, V135\/V150 serial A904646 and up, V175 serial C100861 and up, V200 serial 6435503 and up, V220 serial B117316 and up, V225 serial 5628028 and up, V300\/3.4L serial 5611648 and up, and XR4 and Magnum II serial C239553–D081999. Confirm your exact model, serial number, and thermostat reference before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eSingle aftermarket thermostat for selected marine outboard cooling systems.\u003c\/li\u003e\n    \u003cli\u003e143°F (62°C) operating temperature rating.\u003c\/li\u003e\n    \u003cli\u003eDesigned as a direct replacement when the listed reference and fitment conditions match.\u003c\/li\u003e\n    \u003cli\u003eAftermarket replacement; not an OEM-branded component.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse the following references to compare your existing thermostat. A reference-number match should be confirmed against the complete engine model and serial-number conditions.\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 or source\u003c\/th\u003e\n\u003cth\u003eReference numbers\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003e62981 \/ 66850 \/ 75692 \/ 75692B2 \/ 75692Q2 \/ 75692T\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\/OMC\u003c\/td\u003e\n\u003ctd\u003e377148 \/ 378065 \/ 393659 \/ 434841 \/ 437414 \/ 5005440 \/ 508626\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3543 \/ 18-3553\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e13010\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOther listed aftermarket reference\u003c\/td\u003e\n\u003ctd\u003e9-43019 \/ 9-43101\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eCompatibility is application-specific. Keep horsepower, engine family, stroke type, model, and serial-number conditions together when checking fitment.\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\u003eApplication\u003c\/th\u003e\n\u003cth\u003eRated HP\u003c\/th\u003e\n\u003cth\u003eStroke or engine type\u003c\/th\u003e\n\u003cth\u003eYear or serial condition\u003c\/th\u003e\n\u003cth\u003eReference\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003eEFI outboard applications\u003c\/td\u003e\n\u003ctd\u003e135–200\u003c\/td\u003e\n\u003ctd\u003eVerify engine type\u003c\/td\u003e\n\u003ctd\u003eVerify model and serial number\u003c\/td\u003e\n\u003ctd\u003e62981, 66850, 75692 family\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003eSelected small and mid-range applications\u003c\/td\u003e\n\u003ctd\u003e7.5–115\u003c\/td\u003e\n\u003ctd\u003eVerify engine type\u003c\/td\u003e\n\u003ctd\u003eSpecific serial ranges listed by the manufacturer; confirm before purchase\u003c\/td\u003e\n\u003ctd\u003e75692 family\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury\/Mariner\u003c\/td\u003e\n\u003ctd\u003eV135, V150, V175, V200, V220, V225, V300\/3.4L\u003c\/td\u003e\n\u003ctd\u003e135–300\u003c\/td\u003e\n\u003ctd\u003eV-engine applications\u003c\/td\u003e\n\u003ctd\u003eSpecific model and serial ranges listed by the manufacturer; confirm before purchase\u003c\/td\u003e\n\u003ctd\u003e75692 family \/ Sierra 18-3553\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003eE-TEC applications\u003c\/td\u003e\n\u003ctd\u003e40–250\u003c\/td\u003e\n\u003ctd\u003e2-stroke E-TEC\u003c\/td\u003e\n\u003ctd\u003eVerify model and year\u003c\/td\u003e\n\u003ctd\u003e393659, 434841, 378065, 508626, 5005440\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003eVarious outboard applications\u003c\/td\u003e\n\u003ctd\u003e6–55\u003c\/td\u003e\n\u003ctd\u003e2-stroke\u003c\/td\u003e\n\u003ctd\u003eVerify model and year\u003c\/td\u003e\n\u003ctd\u003eListed Johnson\/Evinrude references\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e9.9 HP and 15 HP applications\u003c\/td\u003e\n\u003ctd\u003e9.9 \/ 15\u003c\/td\u003e\n\u003ctd\u003e4-stroke\u003c\/td\u003e\n\u003ctd\u003e1994–2001\u003c\/td\u003e\n\u003ctd\u003eListed Johnson\/Evinrude references\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003eCrossflow V4 and V6 applications\u003c\/td\u003e\n\u003ctd\u003eVerify engine rating\u003c\/td\u003e\n\u003ctd\u003e2-stroke V4\/V6\u003c\/td\u003e\n\u003ctd\u003eVerify model and year\u003c\/td\u003e\n\u003ctd\u003eListed Johnson\/Evinrude references\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\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n    \u003cdd\u003eMarine outboard thermostat\u003c\/dd\u003e\n    \u003cdt\u003eTemperature Rating\u003c\/dt\u003e\n    \u003cdd\u003e143°F (62°C)\u003c\/dd\u003e\n    \u003cdt\u003eProduct Configuration\u003c\/dt\u003e\n    \u003cdd\u003eSingle thermostat; not a seals or gasket kit\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eDirect replacement when the reference number and complete fitment conditions match\u003c\/dd\u003e\n    \u003cdt\u003eBrand Status\u003c\/dt\u003e\n    \u003cdd\u003eAftermarket replacement, not OEM-branded\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 143°F (62°C) thermostat\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eGaskets, seals, carriers, poppets, washers, and other service parts are not included unless specifically stated in the package contents.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eSwitch off the engine, allow it to cool completely, and follow the service manual’s safety procedure.\u003c\/li\u003e\n    \u003cli\u003eConfirm the thermostat reference, engine model, horsepower, stroke type, and serial number before removing the original part.\u003c\/li\u003e\n    \u003cli\u003eLocate the thermostat housing and place a suitable drain pan beneath the work area if water may drain during service.\u003c\/li\u003e\n    \u003cli\u003eRemove the housing cover and note the orientation of the original thermostat.\u003c\/li\u003e\n    \u003cli\u003eClean the mating surfaces carefully and remove old gasket material without damaging the housing.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement thermostat in the correct orientation. Use a new gasket or seal if required by the engine service manual; none is included with this single thermostat.\u003c\/li\u003e\n    \u003cli\u003eReinstall the housing cover and tighten fasteners evenly to the manufacturer’s specified torque.\u003c\/li\u003e\n    \u003cli\u003eRun the engine according to the service manual and check for water leakage and proper cooling-system 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 know if an outboard thermostat may be failing?\u003c\/summary\u003e\n    \u003cp\u003ePossible symptoms include overheating, an engine that runs unusually cool, poor temperature stability, restricted cooling-water flow, or a thermostat that is visibly corroded or stuck open or closed. Diagnose the complete cooling system before replacing the thermostat.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhy is the 143°F rating important?\u003c\/summary\u003e\n    \u003cp\u003eThe thermostat controls the engine’s operating temperature within the range specified for the application. Use the temperature rating required by your exact engine; do not substitute a different rating solely because the part looks similar.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan this thermostat be used in saltwater?\u003c\/summary\u003e\n    \u003cp\u003eIt is intended for the listed marine outboard applications. Saltwater use increases corrosion risk, so follow the engine manufacturer’s flushing and cooling-system maintenance recommendations.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs a new gasket required?\u003c\/summary\u003e\n    \u003cp\u003eA new gasket or seal is commonly recommended when servicing a thermostat housing, but this listing contains the thermostat only. Select the gasket specified for your exact engine separately if required.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM thermostat?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement intended to match the listed manufacturer references and fitment conditions. Mercury, Mariner, Johnson, Evinrude, OMC, Sierra, and GLM references are used for identification and cross-reference purposes only.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow should I verify fitment?\u003c\/summary\u003e\n    \u003cp\u003eCompare the complete reference number and thermostat temperature rating, then verify the engine brand, model, horsepower, stroke or engine type, year where applicable, and serial-number range. If any of these details differ, consult the engine service manual before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping speed and cost\u003c\/summary\u003e\n    \u003cp\u003eAvailable shipping methods, delivery estimates, and shipping charges are shown at checkout and may vary by destination.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty and returns\u003c\/summary\u003e\n    \u003cp\u003eWarranty coverage and return eligibility are governed by the current store policies. Contact customer support with your order details if the part arrives damaged or appears to be incorrect.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify the complete application and reference number before purchase; horsepower alone does not confirm compatibility.\u003c\/li\u003e\n    \u003cli\u003eDo not rely on a general model range when the engine has a specific serial-number condition.\u003c\/li\u003e\n    \u003cli\u003eAllow the engine to cool before opening the thermostat housing.\u003c\/li\u003e\n    \u003cli\u003eUse the manufacturer’s service manual for torque values, gasket requirements, orientation, and cooling-system testing.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when the correct procedure or fitment is uncertain.\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 marine components selected for listed applications and service needs.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Confirm model, reference, and serial conditions before ordering.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCustomer Support\u003c\/strong\u003e — Contact us with your engine details and existing part reference when you need help checking fitment.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723981132091,"sku":"20TH005","price":26.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Outboard_Thermostat_for_Johnson_Evinrude_6-250_HP_V4_V6_Outboard_Motors_______5005440_-_JLM_MARINE-8286946.jpg?v=1763039251"}],"url":"https:\/\/seasierra.com\/collections\/evinrude-2-stroke-outboard-engine-parts-6-250hp.oembed","provider":"SeaSierra","version":"1.0","type":"link"}