{"title":"Force 2-Stroke 70-135HP Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e5e5; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page supports Force 2-Stroke 70–135HP outboard engines. Use it to find compatible parts and service information, including maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Force 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\/section.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/force-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#0a5; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Force Parts\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 70-135HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eLocate the model\/serial plate on the transom bracket or the swivel bracket. The sticker or plate typically shows model code, serial number, and production date.\u003c\/li\u003e\n    \u003cli\u003eRead the model code: suffix letters often indicate shaft length (e.g., L\/XL), start\/charging options, and remote vs. tiller controls.\u003c\/li\u003e\n    \u003cli\u003eConfirm platform: 70\/85\/90HP models are commonly inline-3 2‑stroke; 120\/125\/135HP models are commonly inline‑4 2‑stroke.\u003c\/li\u003e\n    \u003cli\u003eNote Mercury-era Force units (late 1980s–1990s) may share some gearcase\/prop hardware styles with Mercury; verify prop shaft size and thread before ordering hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"platforms\" style=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eEngine Platform Overview\u003c\/h2\u003e\n\n  \u003ch3\u003eInline-3 Carbureted 2‑Stroke (70\/85\/90 HP)\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; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInline‑3 carbureted 2‑stroke outboard with conventional reed induction.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e70HP, 85HP, 90HP Force 2‑stroke models (remote control, various shaft lengths).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eGood power-to-weight, simple carburetion, straightforward maintenance.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eIgnition, fuel, and prop hardware may differ by year; verify serial\/model before ordering. Use 50:1 fuel mix unless equipped with a functional oil-injection system.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3 style=\"margin-top:20px;\"\u003eInline-4 Carbureted 2‑Stroke (120\/125\/135 HP)\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; padding:8px;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eConfiguration\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eInline‑4 carbureted 2‑stroke with through‑hub exhaust and standard gearcase.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eCommon Models\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003e120HP, 125HP, 135HP Force 2‑stroke models in L\/XL shaft lengths.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eAdvantages\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f0f0f0;\"\u003eStrong mid‑range torque for heavier boats; widely supported service parts.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eNotes\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eMany Mercury‑era Force gearcases use Mercury‑style prop hardware; confirm spline count and prop nut style before purchase.\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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for 2‑stroke outboards. Always follow the procedures and schedules in your engine’s 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 #ddd; padding:8px;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eGear oil (lower unit)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eInspect for water intrusion (milky oil). Replace seals if contamination is found.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/force-outboard-parts\"\u003eForce Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eInspect every 50 hours; replace ~100 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eUse correct heat range and gap; replace if fouled or worn.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\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 style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eFuel filter \/ in‑line filter\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eReplace more often with ethanol fuel or contaminated tanks.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eWater pump impeller \/ kit\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003e2–3 seasons or 200 hours\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eEssential for cooling; replace sooner if weak tell‑tale or overheat.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/force-water-pump-repair-kits\"\u003eForce Water Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eAnodes (sacrificial)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eInspect each service; replace when 50% consumed\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eMatch material (zinc\/aluminum\/magnesium) to your water type.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003e2‑Stroke oil mix \/ oil injection check\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eEvery fill‑up \/ every service\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eUse fresh 50:1 mix unless equipped with a maintained oil‑injection system; inspect lines and pump if applicable.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/force-outboard-parts\"\u003eForce Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003ePropeller \u0026amp; hardware inspection\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eEach service \/ after impacts\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eCheck for bent blades, worn hub, and correct prop nut\/washer stack.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eThermostat\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eEvery 2–3 years or if overcooling\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003eStuck‑open thermostats can cause rich running and smoke.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f5f5f5;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/force-outboard-parts\"\u003eForce Outboard Parts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLower unit seal service\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eAs needed (water in gear oil \/ leaks)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003ePressure\/vacuum test gearcase and reseal if it fails.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/force-lower-unit-seal-kits\"\u003eForce Lower 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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eCooling System – \u003ca href=\"https:\/\/seasierra.com\/collections\/force-water-pump-repair-kits\"\u003eForce Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase \u0026amp; Seals – \u003ca href=\"https:\/\/seasierra.com\/collections\/force-lower-unit-seal-kits\"\u003eForce Lower Unit Seal Kits\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\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\u003ePropellers \u0026amp; Hardware – \u003ca href=\"https:\/\/seasierra.com\/collections\/propellers\"\u003ePropellers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection – \u003ca href=\"https:\/\/seasierra.com\/collections\/anodes\"\u003eAnodes\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGeneral Force Parts – \u003ca href=\"https:\/\/seasierra.com\/collections\/force-outboard-parts\"\u003eForce Outboard Parts\u003c\/a\u003e\n\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"margin-top:24px;\"\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; padding:8px;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #ddd; padding:8px;\"\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eWeak tell‑tale or overheat alarm\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eInspect intake screens, tell‑tale hose, and water pump impeller; verify thermostat operation.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eWater pump kit, thermostat, intake screen components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eCheck fuel quality, in‑line filter, spark condition, and prop damage; perform compression test if needed.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eFuel filter, spark plugs, propeller, carburetor components\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eVerify primer bulb firmness, look for air leaks at connectors\/lines, clean carbs, confirm choke\/enrichment function.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eSpark plugs, fuel connector\/lines, carburetor kits, fuel pump diaphragm\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eExcessive smoke (2‑stroke)\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eConfirm 50:1 mix ratio, use fresh TC‑W3 oil, and check thermostat (over‑cooling increases smoke).\u003c\/td\u003e\n        \u003ctd style=\"padding:8px; border-bottom:1px solid #f2f2f2;\"\u003eSpark plugs, thermostat\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd style=\"padding:8px;\"\u003eGearcase noise \/ metal in gear oil\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eInspect drained oil for water\/metal, check prop shaft for fishing line, and measure end play; pressure test gearcase.\u003c\/td\u003e\n        \u003ctd style=\"padding:8px;\"\u003eLower unit seal kit, bearings, prop hardware\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=\"margin-top:24px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable across different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome Force models share components across years, but ignition, carburetion, and gearcase parts can change by platform and production year. Always confirm model and serial to verify compatibility before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should I replace the impeller?\u003c\/summary\u003e\n    \u003cp\u003eInspect annually and replace every 2–3 seasons (or ~200 hours). Replace immediately if you see a weak tell‑tale, overheating, or if the engine ingested sand\/debris.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I change lower unit gear oil?\u003c\/summary\u003e\n    \u003cp\u003eChange every 100 hours or annually, and any time the oil looks milky or contaminated. If water is present, pressure test and reseal the gearcase.\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 model code, serial number, shaft length (L\/XL), and any notable features (remote\/tiller, electric start, oil injection). Photos of the nameplate and the part to be replaced are helpful.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"margin-top:24px; padding:16px; border:1px solid #e5e5e5; border-radius:8px;\"\u003e\n  \u003cp\u003eReady to find the parts you need? Browse the main Force collection to filter by horsepower, year, and model.\u003c\/p\u003e\n  \u003cp\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/force-outboard-parts\" style=\"display:inline-block; padding:10px 14px; background:#0a5; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Force Outboard Parts\u003c\/a\u003e\u003c\/p\u003e\n  \u003cp style=\"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-omc-johnson-evinrude-55-75-hp-replaces-396987-382385","title":"143°F Marine Thermostat for Johnson\/Evinrude, Chrysler\/Force, MerCruiser and Volvo Penta Applications","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:560px; }\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 143°F (62°C) marine thermostat is an aftermarket replacement designed for selected Johnson\/Evinrude, Chrysler\/Force, MerCruiser and Volvo Penta applications. It helps regulate engine operating temperature by opening at the specified 143°F rating.\u003c\/p\u003e\n  \u003cp\u003eThe company catalog identifies this product as a single thermostat rather than a multi-part kit. Confirm the part number and complete engine or sterndrive application before ordering.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eProduct type: Marine thermostat\u003c\/li\u003e\n    \u003cli\u003eOpening temperature: 143°F (62°C)\u003c\/li\u003e\n    \u003cli\u003eInstallation: Replacement thermostat; follow the engine manufacturer’s service procedure\u003c\/li\u003e\n    \u003cli\u003ePackage type: Single thermostat\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eReference Part Numbers\u003c\/h2\u003e\n  \u003cp\u003eThe following manufacturer and aftermarket references are associated with this thermostat application. Part-number matching should be confirmed against the original component and engine service information.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Reference Part Numbers\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand or application\u003c\/th\u003e\n          \u003cth\u003eReference number\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC Johnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e396987\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC Johnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e382385\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eOMC Johnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003e778261\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eChrysler\/Force\u003c\/td\u003e\n\u003ctd\u003eF335068\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMerCruiser\u003c\/td\u003e\n\u003ctd\u003e47594\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eVolvo Penta\u003c\/td\u003e\n\u003ctd\u003e21148403\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra\u003c\/td\u003e\n\u003ctd\u003e18-3557\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e13080\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eMallory\u003c\/td\u003e\n\u003ctd\u003e9-43024\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eApplication Compatibility\u003c\/h2\u003e\n  \u003cp\u003eCompany catalog records associate this thermostat with the following application groups. The records do not provide a universal model-year, serial-number or stroke range for every application, so verify the exact engine or sterndrive identification and reference number before purchase.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Application Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eManufacturer or application\u003c\/th\u003e\n          \u003cth\u003eDocumented application details\u003c\/th\u003e\n          \u003cth\u003eReference number\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eJohnson\/Evinrude outboard\u003c\/td\u003e\n          \u003ctd\u003eSelected 55, 60, 65, 70 and 75 HP outboard applications\u003c\/td\u003e\n          \u003ctd\u003e396987, 382385, 778261\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eChrysler\/Force outboard\u003c\/td\u003e\n          \u003ctd\u003eSelected 70, 90, 105, 120 and 135 HP applications\u003c\/td\u003e\n          \u003ctd\u003eF335068\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMerCruiser stern drive \/ outdrive\u003c\/td\u003e\n          \u003ctd\u003eGM 6-cylinder engines with 4.1–4.8 L displacement and 90, 160 or 200 HP applications\u003c\/td\u003e\n          \u003ctd\u003e47594\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eVolvo Penta stern drive \/ outdrive\u003c\/td\u003e\n          \u003ctd\u003e3.0 GXi and 3.0GXiC applications\u003c\/td\u003e\n          \u003ctd\u003e21148403\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \u003cp\u003eHorsepower, engine family and drive type must remain matched to the correct reference number. A similar-looking thermostat or a matching horsepower rating alone does not confirm fitment.\u003c\/p\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct type\u003c\/dt\u003e\n    \u003cdd\u003eAftermarket marine thermostat\u003c\/dd\u003e\n    \u003cdt\u003eOpening temperature\u003c\/dt\u003e\n    \u003cdd\u003e143°F (62°C)\u003c\/dd\u003e\n    \u003cdt\u003eApplications\u003c\/dt\u003e\n    \u003cdd\u003eSelected Johnson\/Evinrude, Chrysler\/Force, MerCruiser and Volvo Penta outboard or stern-drive applications\u003c\/dd\u003e\n    \u003cdt\u003ePackage configuration\u003c\/dt\u003e\n    \u003cdd\u003eSingle thermostat\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\n  \u003ch2\u003eWhat’s in the Box\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 × 143°F (62°C) marine thermostat\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eA gasket or seal is not listed as an included component in the company package record. Check the condition of the existing sealing parts and obtain any required replacement gasket or seal separately unless your application documentation specifies otherwise.\u003c\/p\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eAllow the engine to cool completely and follow all applicable safety procedures.\u003c\/li\u003e\n    \u003cli\u003eDisconnect the battery or otherwise isolate the starting system as directed by the service manual.\u003c\/li\u003e\n    \u003cli\u003eLocate the thermostat housing and place a suitable drain pan or absorbent material below the work area.\u003c\/li\u003e\n    \u003cli\u003eRemove the housing cover according to the engine manufacturer’s instructions.\u003c\/li\u003e\n    \u003cli\u003eNote the orientation of the original thermostat before removing it.\u003c\/li\u003e\n    \u003cli\u003eClean the mating surfaces carefully, removing old gasket material and corrosion without damaging the housing.\u003c\/li\u003e\n    \u003cli\u003eInstall the replacement thermostat in the correct orientation and use the proper gasket or seal for the application.\u003c\/li\u003e\n    \u003cli\u003eReinstall the housing and tighten the fasteners to the manufacturer’s specified torque.\u003c\/li\u003e\n    \u003cli\u003eRestore the cooling system as required, start the engine in accordance with the service manual, and check for leaks and correct temperature control.\u003c\/li\u003e\n  \u003c\/ol\u003e\n  \u003cp\u003eFor stern-drive and outdrive systems, follow the specific cooling-system procedure for the engine and drive assembly. Do not rely on a generic installation procedure where the manufacturer specifies a different service method.\u003c\/p\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat temperature is this thermostat rated for?\u003c\/summary\u003e\n    \u003cp\u003eThis thermostat is rated at 143°F (62°C).\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow can I tell whether my thermostat may be failing?\u003c\/summary\u003e\n    \u003cp\u003ePossible symptoms include overheating, running too cool, failure to reach normal operating temperature, or irregular temperature changes. These symptoms can also be caused by other cooling-system problems, so diagnose the complete system before replacing parts.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this product include a gasket or seal?\u003c\/summary\u003e\n    \u003cp\u003eThe company record identifies the product as a single thermostat and does not list a gasket or seal as included. Check your application requirements and purchase any required sealing component separately unless it is supplied with your specific order.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this an OEM thermostat?\u003c\/summary\u003e\n    \u003cp\u003eThis is an aftermarket replacement thermostat. The listed manufacturer and aftermarket numbers are reference numbers used to help identify compatible applications; the product is not represented as a genuine OEM-branded component.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I confirm fitment?\u003c\/summary\u003e\n    \u003cp\u003eCompare the original thermostat and its reference number with the application information above. Confirm the manufacturer, engine or drive type, horsepower, displacement where applicable, and service-manual requirements before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should a marine thermostat be replaced?\u003c\/summary\u003e\n    \u003cp\u003eInspect the thermostat as part of normal cooling-system maintenance and replace it if it sticks, corrodes, fails to regulate temperature, or does not meet the manufacturer’s service requirements. Follow the maintenance interval specified for your engine.\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 application and reference number before purchase.\u003c\/li\u003e\n    \u003cli\u003eNever open a hot cooling system. Allow the engine to cool before service.\u003c\/li\u003e\n    \u003cli\u003eUse the correct gasket or seal and follow the manufacturer’s torque and installation instructions.\u003c\/li\u003e\n    \u003cli\u003eIncorrect thermostat fitment or installation can cause overheating, poor temperature control or engine damage.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended when the correct service procedure is not known.\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-focused selection:\u003c\/strong\u003e We supply replacement components for a range of outboard, stern-drive and inboard marine applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication support:\u003c\/strong\u003e Use the listed reference numbers and application details to help identify the correct replacement before ordering.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePractical replacement parts:\u003c\/strong\u003e Our catalog is organized around serviceable marine components intended to restore reliable operation when matched to the correct application.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723979460923,"sku":"23TH612","price":31.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23TH612_1_5e34ae9e-97b8-41a0-aa58-a69e26612693.jpg?v=1763039169"}],"url":"https:\/\/seasierra.com\/collections\/force-2-stroke-70-135hp-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}