{"title":"Johnson 2-Stroke 6-55HP Outboard Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp\u003eDesigned for Johnson 2‑Stroke 6–55HP outboard engines, this page helps you find compatible parts and clear service information. You’ll find maintenance tips, common replacement items, and troubleshooting guidance. You can also browse the main Johnson\/Evinrude\/OMC collection. Scroll to the bottom of this page to start browsing parts for this engine, and on the collection page use the “Filter \u0026amp; Sort” controls to narrow results by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-outboard-parts\" style=\"display:inline-block;padding:10px 16px;border:1px solid #0b5ed7;border-radius:6px;text-decoration:none;\"\u003eBrowse All Johnson\/Evinrude\/OMC Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:12px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 6–55HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the model and serial plate on the transom bracket or swivel bracket; record both numbers before ordering parts.\u003c\/li\u003e\n    \u003cli\u003eRead the model code: it typically indicates horsepower, shaft length (S\/L\/XL), and control type (tiller or remote). Suffix letters often denote the production year or revision.\u003c\/li\u003e\n    \u003cli\u003eConfirm it’s a 2‑Stroke: these models run premix fuel or an oil‑injection system (VRO). Presence of an oil tank and lines to the powerhead suggests oil‑injection.\u003c\/li\u003e\n    \u003cli\u003eMatch platform by size: small portables (6–15HP) are single\/twin cylinder; midrange (18–55HP) are inline twin or triple. Use exact model numbers for accurate fitment.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"platforms\" style=\"padding:12px 0;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003ePortable Inline 2‑Stroke (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 #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\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\u003eLightweight, carbureted 2‑Stroke single or twin; manual or electric start.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eJohnson 6–8–9.9–15HP portable families across multiple years.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eSimple upkeep, easy starting, excellent for dinghies and small fishing boats.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eService the water pump regularly; verify prop spline and shaft length. Keep idle circuits clean for smooth trolling.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eMidrange Inline 2‑Stroke (18–35HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\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\u003eCarbureted inline twin or triple with choke\/primer; robust gearcases for utility use.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eJohnson 18–20–25–30–35HP 2‑Stroke platforms (multiple generations).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eStrong hole‑shot and midrange punch; straightforward ignition and fuel systems.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eCarb synchronization and clean fuel delivery are key. Match prop pitch to boat load and target RPM.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eMidrange Inline 2‑Stroke (40–55HP)\u003c\/h3\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\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 twin or triple carbureted 2‑Stroke; some models use VRO oil‑injection.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eJohnson 40–48–50–55HP families across various years.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eGood balance of weight and thrust for larger aluminum boats and light pontoons.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eUse correct thermostats and maintain tell‑tale flow. Inspect oiling hoses and clamps on VRO builds.\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:12px 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Johnson 2‑Stroke models. Always follow the official service manual for your exact engine 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 #ddd;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\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\u003eCheck for water intrusion (milky oil). Replace sealing washers; service seals if metal\/water present.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-service-maintenance-kits\"\u003eShop Service \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\u003eInspect 50 hours; replace ~100 hours or as needed\u003c\/td\u003e\n        \u003ctd\u003eUse correct heat range and gap; 2‑Strokes can foul from extended idling.\u003c\/td\u003e\n        \u003ctd\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\u003eFuel Filter \/ In‑Line Filter\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eReplace in‑line filter and clean on‑engine screens; drain separators in humid climates.\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\u003eAnnually in sandy\/silty use; otherwise every 2–3 seasons\u003c\/td\u003e\n        \u003ctd\u003eRestore cooling performance; replace housing if worn or scored.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-water-pump-repair-kits\"\u003eJohnson\/Evinrude\/OMC Water Pump Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAnodes (Internal\/External)\u003c\/td\u003e\n        \u003ctd\u003eInspect every 20–50 hours; replace when ~50% depleted\u003c\/td\u003e\n        \u003ctd\u003eMatch anode material (zinc\/aluminum\/magnesium) to water type for best corrosion protection.\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\u003e2‑Stroke Oiling (Premix or VRO)\u003c\/td\u003e\n        \u003ctd\u003eCheck each service; replace hoses every 5–7 years\u003c\/td\u003e\n        \u003ctd\u003ePremix is commonly 50:1 unless specified otherwise. On VRO, inspect tank, lines, and bleed after service.\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\u003eLower Unit Seals (if leak detected)\u003c\/td\u003e\n        \u003ctd\u003eAs needed\u003c\/td\u003e\n        \u003ctd\u003eReplace when water intrusion or oil leakage is found during gear oil changes.\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    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:12px 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service \u0026amp; Tune‑Up: \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\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e and \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-pumps\"\u003eFuel Pumps\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical: \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003ePropulsion: \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\u003eGearcase \u0026amp; Seals: \u003ca href=\"https:\/\/seasierra.com\/collections\/lower-unit-seal-kits\"\u003eLower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:12px 0;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left;border-bottom:1px solid #ddd;\"\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, thermostat, and impeller; verify hose routing and kinks.\u003c\/td\u003e\n        \u003ctd\u003eWater pump kit, impeller, thermostat, intake screen\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd\u003eCheck for damaged prop or wrong pitch, fouled plugs, clogged filters, and dirty carb circuits.\u003c\/td\u003e\n        \u003ctd\u003ePropeller, spark plugs, fuel filter, carburetor repair kit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd\u003eVerify primer\/choke operation, look for air leaks in fuel lines, confirm spark and plug gap.\u003c\/td\u003e\n        \u003ctd\u003ePrimer\/solenoid, fuel hoses, spark plugs, carburetor repair kit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eExcessive smoke at idle (2‑Stroke)\u003c\/td\u003e\n        \u003ctd\u003eConfirm premix ratio, thermostat function (cold running), and oil‑injection settings\/hoses.\u003c\/td\u003e\n        \u003ctd\u003eThermostat, oil lines\/hoses, spark plugs\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd\u003eInspect oil level\/condition, prop shaft for fishing line, and seals for leakage.\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, bearings, drain\/fill plug gaskets\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:12px 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\u003eSome items interchange within the same platform and generation, but many components vary by year, horsepower, and configuration. Always verify with your exact model and serial number.\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\u003eIn clean water, every 2–3 seasons is typical. In sandy or silty conditions, replace annually or sooner if the tell‑tale weakens or temperature alarms occur.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change the lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eAt least every 100 hours or annually. If you find milky oil or metal particles, service seals and inspect for internal wear before further operation.\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 share the engine model and serial numbers, approximate year, shaft length, and photos of the nameplate and the part you intend to replace.\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 for your Johnson 2‑Stroke 6–55HP outboard? Browse the main collection and filter by horsepower, year, and model to quickly narrow results.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-outboard-parts\" style=\"display:inline-block;padding:10px 16px;border:1px solid #198754;border-radius:6px;text-decoration:none;\"\u003eShop Johnson\/Evinrude\/OMC Outboard Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;\"\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-143-f-62-c-fits-johnson-evinrude-6-250-hp-replaces-5005440-378065-393659","title":"143°F Thermostat for Mercury Mariner 75–175 HP DFI Outboards – Replaces Mercury 833072002, 833072003, 833072004","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 aftermarket \u003cstrong\u003e143°F (62°C) thermostat\u003c\/strong\u003e is designed for specified Mercury and Mariner DFI outboard applications from 75 to 175 HP. It is a single replacement thermostat for engines using the Mercury references listed below, including 1.5L three-cylinder DFI applications and 2.5L V-135, V-150, and V-175 DFI applications.\u003c\/p\u003e\n  \u003cp\u003eThe thermostat begins opening at 143°F (62°C) to help regulate engine temperature within the cooling system. Verify the complete engine model and serial-number range before ordering; horsepower alone does not confirm fitment.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eReplacement type:\u003c\/strong\u003e Single aftermarket outboard thermostat\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOpening temperature:\u003c\/strong\u003e 143°F (62°C)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplicable brands:\u003c\/strong\u003e Mercury and Mariner\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation:\u003c\/strong\u003e Direct replacement when the listed model and serial conditions match\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eThese manufacturer and aftermarket references are provided for identification and cross-reference purposes. Confirm the reference against your engine parts diagram 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\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e833072002\u003c\/td\u003e\n\u003ctd\u003eReplacement reference for specified 1.5L DFI applications\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e833072003\u003c\/td\u003e\n\u003ctd\u003eReplacement reference for specified 2.5L DFI applications\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMercury Marine\u003c\/td\u003e\n\u003ctd\u003e833072004\u003c\/td\u003e\n\u003ctd\u003eReplacement reference for specified 1.5L DFI applications\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3536\u003c\/td\u003e\n\u003ctd\u003e143°F thermostat reference for specified 2.5L DFI applications\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3537\u003c\/td\u003e\n\u003ctd\u003e143°F thermostat reference for specified 1.5L DFI applications\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC \/ Johnson-Evinrude\u003c\/td\u003e\n\u003ctd\u003e5005440\u003c\/td\u003e\n\u003ctd\u003eSeparate cross-reference shown in catalog research; verify application independently\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC \/ Johnson-Evinrude\u003c\/td\u003e\n\u003ctd\u003e378065, 393659, 434841, 508626\u003c\/td\u003e\n\u003ctd\u003eSeparate cross-reference shown in catalog research; verify application independently\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\u003eThe following applications are stated for the corresponding Mercury or Mariner thermostat references. Keep each engine family, displacement, horsepower, year, and serial-number condition 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\u003eEngine family\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eDisplacement\u003c\/th\u003e\n          \u003cth\u003eYears\u003c\/th\u003e\n          \u003cth\u003eSerial range\u003c\/th\u003e\n          \u003cth\u003eApplicable reference\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\u003e75 DFI, 3-cylinder\u003c\/td\u003e\n          \u003ctd\u003e75 HP\u003c\/td\u003e\n          \u003ctd\u003e1.5L\u003c\/td\u003e\n          \u003ctd\u003e2006 and newer\u003c\/td\u003e\n          \u003ctd\u003eOT980000 and up\u003c\/td\u003e\n          \u003ctd\u003e833072004 \/ Sierra 18-3537\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003e90 DFI, 3-cylinder\u003c\/td\u003e\n          \u003ctd\u003e90 HP\u003c\/td\u003e\n          \u003ctd\u003e1.5L\u003c\/td\u003e\n          \u003ctd\u003e2004 and newer\u003c\/td\u003e\n          \u003ctd\u003eOT801000 and up\u003c\/td\u003e\n          \u003ctd\u003e833072004 \/ Sierra 18-3537\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003e115 DFI, 3-cylinder\u003c\/td\u003e\n          \u003ctd\u003e115 HP\u003c\/td\u003e\n          \u003ctd\u003e1.5L\u003c\/td\u003e\n          \u003ctd\u003e2004 and newer\u003c\/td\u003e\n          \u003ctd\u003eOT801000 and up\u003c\/td\u003e\n          \u003ctd\u003e833072004 \/ Sierra 18-3537\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003eV-135 DFI\u003c\/td\u003e\n          \u003ctd\u003e135 HP\u003c\/td\u003e\n          \u003ctd\u003e2.5L\u003c\/td\u003e\n          \u003ctd\u003e1998 and newer\u003c\/td\u003e\n          \u003ctd\u003eOG590000 and up\u003c\/td\u003e\n          \u003ctd\u003e833072003 \/ Sierra 18-3536\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003eV-150 DFI\u003c\/td\u003e\n          \u003ctd\u003e150 HP\u003c\/td\u003e\n          \u003ctd\u003e2.5L\u003c\/td\u003e\n          \u003ctd\u003e1998 and newer\u003c\/td\u003e\n          \u003ctd\u003eOG590000 and up\u003c\/td\u003e\n          \u003ctd\u003e833072003 \/ Sierra 18-3536\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury \/ Mariner\u003c\/td\u003e\n          \u003ctd\u003eV-175 DFI\u003c\/td\u003e\n          \u003ctd\u003e175 HP\u003c\/td\u003e\n          \u003ctd\u003e2.5L\u003c\/td\u003e\n          \u003ctd\u003e2001 and newer\u003c\/td\u003e\n          \u003ctd\u003eOT178500 and up\u003c\/td\u003e\n          \u003ctd\u003e833072003 \/ Sierra 18-3536\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e The catalog data supports the applications above. Do not extend compatibility to other Mercury, Mariner, Johnson, or Evinrude models solely because they share a horsepower rating or a similar-looking thermostat.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct type\u003c\/dt\u003e\n    \u003cdd\u003eOutboard engine thermostat\u003c\/dd\u003e\n    \u003cdt\u003eOpening temperature\u003c\/dt\u003e\n    \u003cdd\u003e143°F (62°C)\u003c\/dd\u003e\n    \u003cdt\u003eApplication range\u003c\/dt\u003e\n    \u003cdd\u003eSpecified Mercury and Mariner 75–175 HP DFI outboards\u003c\/dd\u003e\n    \u003cdt\u003eEngine applications\u003c\/dt\u003e\n    \u003cdd\u003e1.5L three-cylinder DFI and 2.5L V-135, V-150, and V-175 DFI applications listed above\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n    \u003cdd\u003eDirect replacement for a matching application\u003c\/dd\u003e\n    \u003cdt\u003eProduct status\u003c\/dt\u003e\n    \u003cdd\u003eAftermarket replacement; not a Mercury Marine OEM component\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\u003eThis listing is for a single thermostat. Gaskets, seals, thermostat covers, and multi-thermostat kits are not included unless separately stated in the order details.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eConfirm the engine model, displacement, horsepower, and complete serial-number range before beginning work.\u003c\/li\u003e\n    \u003cli\u003eSwitch off the engine, disconnect the battery where applicable, and allow the engine to cool completely.\u003c\/li\u003e\n    \u003cli\u003eLocate the thermostat housing or cylinder-head thermostat location for your specific engine.\u003c\/li\u003e\n    \u003cli\u003eRemove the housing or retaining hardware and note the original thermostat orientation.\u003c\/li\u003e\n    \u003cli\u003eClean the mating surfaces carefully and remove any damaged or contaminated sealing material.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement thermostat in the same orientation as the original part.\u003c\/li\u003e\n    \u003cli\u003eReuse or replace the required gasket or seal according to the engine service manual; no gasket or seal is included with this single thermostat listing.\u003c\/li\u003e\n    \u003cli\u003eReinstall the housing and tighten the fasteners to the manufacturer's specified torque.\u003c\/li\u003e\n    \u003cli\u003eRun the engine using the appropriate water supply procedure for the outboard and check for leaks and normal temperature regulation.\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\u003eWhat temperature does this thermostat open at?\u003c\/summary\u003e\n    \u003cp\u003eThis thermostat is specified to begin opening at 143°F (62°C).\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhich engines does this thermostat fit?\u003c\/summary\u003e\n    \u003cp\u003eIt is listed for specified Mercury and Mariner 75, 90, and 115 HP three-cylinder 1.5L DFI engines, plus V-135, V-150, and V-175 2.5L DFI engines. Year and serial-number conditions vary by engine family, so use the compatibility table rather than horsepower alone.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre gaskets or seals included?\u003c\/summary\u003e\n    \u003cp\u003eNo. This product is a single thermostat. Required gaskets or seals must be reused only if serviceable or purchased separately according to the engine service manual.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM Mercury Marine thermostat?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is an aftermarket replacement intended for the listed applications and reference numbers.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use the thermostat on another engine with the same horsepower?\u003c\/summary\u003e\n    \u003cp\u003eNot necessarily. Thermostat fitment depends on the engine family, displacement, model details, and serial-number range. Confirm all of those conditions before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat should I do if the replacement does not match my original part?\u003c\/summary\u003e\n    \u003cp\u003eDo not force or modify the part. Compare the thermostat and housing arrangement with the original and verify the engine serial range. Contact support before installation if the application or physical fit is unclear.\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\u003eAllow the engine to cool completely before servicing the cooling system.\u003c\/li\u003e\n    \u003cli\u003eFollow the service manual for your exact engine when replacing the thermostat and sealing components.\u003c\/li\u003e\n    \u003cli\u003eVerify the model, displacement, horsepower, year, and serial number before purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement and is not manufactured or endorsed by Mercury Marine, Mariner, Sierra, or OMC.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended if you are not familiar with outboard cooling-system service.\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 provide aftermarket components for boat and outboard maintenance.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication-focused listings\u003c\/strong\u003e — Product information is organized around engine models, reference numbers, and fitment conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSupport before installation\u003c\/strong\u003e — Contact our team if your engine details or replacement reference do not clearly match the information above.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723973562683,"sku":"23TH615","price":23.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Thermostat_for_Johnson-Evinrude_378065_393659_434841_437414_5005440___5005440_435491_833072003_18-3536_-_JLM_MARINE-8291316.jpg?v=1763038908"}],"url":"https:\/\/seasierra.com\/collections\/johnson-2-stroke-6-55hp-outboard-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}