{"title":"OMC 4-Stroke 8.2L Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px 0;\"\u003e\n  \u003cp style=\"max-width:900px;\"\u003e\n    This page is for OMC 4‑Stroke 8.2L marine engines and is designed to help you find compatible parts and service information. Below you’ll find maintenance tips, commonly replaced parts, and troubleshooting guidance. You can also browse our main Johnson\/Evinrude\/OMC collection anytime. Scroll to the bottom of this page to start browsing parts for this engine, and remember that on the collection page you can use the Filter \u0026amp; Sort controls to narrow results by horsepower, year range, and part category.\n  \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 #0b66c3;border-radius:6px;text-decoration:none;color:#0b66c3;\"\u003eBrowse All OMC Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:10px 0;\"\u003e\n  \u003ch2\u003eHow to Identify Your 8.2L Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate\/serial plate: Look on the engine block or valve cover, and on the transom bracket or drive housing for sterndrive packages. Record both the engine serial and the drive model if equipped.\u003c\/li\u003e\n    \u003cli\u003eModel code and suffix: Codes often indicate displacement (8.2L), induction type (carbureted vs. EFI), cooling (raw water vs. closed), and year\/production revisions.\u003c\/li\u003e\n    \u003cli\u003eDrive identification: OMC Cobra\/King Cobra sterndrive tags are typically on the upper gearcase. Gear ratio and year help confirm seal kit and water pump compatibility.\u003c\/li\u003e\n    \u003cli\u003e4‑Stroke cues: Presence of an engine oil filter, valve covers, and a separate gearcase with drain\/fill plugs (for sterndrives) help confirm parts selection.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:10px 0;\"\u003e\n  \u003ch2\u003eEngine Overview\u003c\/h2\u003e\n  \u003ch3\u003eOMC 8.2L V8 (Carbureted)\u003c\/h3\u003e\n  \u003ctable style=\"max-width:900px;border-collapse:collapse;\" border=\"1\" cellpadding=\"6\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eFeature\u003c\/th\u003e\n        \u003cth\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\u003eV8, 4‑stroke gasoline, carbureted; commonly paired with OMC Cobra\/King Cobra sterndrives.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e8.2L big‑block packages used in heavy runabouts, cruisers, and workboats.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eStrong low‑to‑midrange torque; straightforward service with conventional ignition\/fuel systems.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eMatch water pump and seal kits by drive model and year; verify ignition components and fuel filter style before ordering.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eOMC 8.2L V8 (EFI)\u003c\/h3\u003e\n  \u003ctable style=\"max-width:900px;border-collapse:collapse;\" border=\"1\" cellpadding=\"6\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eFeature\u003c\/th\u003e\n        \u003cth\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\u003eV8, 4‑stroke gasoline with electronic fuel injection; sterndrive propulsion.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003eLate‑production big‑block OMC packages in performance and cruiser applications.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eSmoother cold starts, improved fuel metering, and better altitude\/temperature compensation.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eConfirm sensor and fuel filter part styles; impeller and gearcase parts are selected by the sterndrive model and year.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"service-kits\" style=\"padding:10px 0;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for typical recreational use. Always follow the official service manual for your exact model, operating profile, and environment.\u003c\/p\u003e\n  \u003ctable style=\"max-width:1000px;border-collapse:collapse;\" border=\"1\" cellpadding=\"6\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eItem\u003c\/th\u003e\n        \u003cth\u003eInterval*\u003c\/th\u003e\n        \u003cth\u003eRemarks\u003c\/th\u003e\n        \u003cth\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eEngine oil + filter\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eUse marine‑rated oil; replace filter at each oil change.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/oil-filters\"\u003eOil Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGear oil (sterndrive)\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eInspect drain\/fill seals and magnetic plug for debris.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-lower-unit-seal-kits\"\u003eJohnson\/Evinrude\/OMC Lower 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\u003eInspect 100 hours; replace 200 hours or as needed\u003c\/td\u003e\n        \u003ctd\u003eGap to spec; replace fouled or worn plugs.\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 \/ water separator\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hours or annually\u003c\/td\u003e\n        \u003ctd\u003eDrain separator and replace elements regularly; ethanol fuel may require shorter intervals.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eWater pump impeller\/kit\u003c\/td\u003e\n        \u003ctd\u003eEvery 2 seasons (sooner in sandy\/silty water)\u003c\/td\u003e\n        \u003ctd\u003eCritical for cooling; replace housing if scored or warped.\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 (corrosion protection)\u003c\/td\u003e\n        \u003ctd\u003eInspect every 50 hours; replace when 50% consumed\u003c\/td\u003e\n        \u003ctd\u003eMatch alloy to water type (zinc\/salt, aluminum\/brackish, magnesium\/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\u003eAccessory\/serpentine belt\u003c\/td\u003e\n        \u003ctd\u003eInspect 100 hours; replace 2 years or as needed\u003c\/td\u003e\n        \u003ctd\u003eCheck for cracks, glazing, tensioner wear.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/belt\"\u003eBelts\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCharging system check\u003c\/td\u003e\n        \u003ctd\u003eAnnually\u003c\/td\u003e\n        \u003ctd\u003eVerify output and connections; inspect pulleys and wiring.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/alternators\"\u003eAlternators\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:10px 0;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-service-maintenance-kits\"\u003eJohnson\/Evinrude\/OMC Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-water-pump-repair-kits\"\u003eJohnson\/Evinrude\/OMC Water Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eFuel System: \u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eIgnition \/ Electrical: \u003ca href=\"https:\/\/seasierra.com\/collections\/electrical-items\"\u003eElectrical Items\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCorrosion Protection: \u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-anodes\"\u003eJohnson\/Evinrude\/OMC Anodes\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    \u003cli\u003ePropulsion \u0026amp; Gearcase: \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-lower-unit-seal-kits\"\u003eJohnson\/Evinrude\/OMC Lower 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:10px 0;\"\u003e\n  \u003ch2\u003eCommon Symptoms \u0026amp; Quick Checks\u003c\/h2\u003e\n  \u003ctable style=\"max-width:1000px;border-collapse:collapse;\" border=\"1\" cellpadding=\"6\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eSymptom\u003c\/th\u003e\n        \u003cth\u003eCheck First\u003c\/th\u003e\n        \u003cth\u003eRelated Parts\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eWeak water stream or overheat alarm\u003c\/td\u003e\n        \u003ctd\u003eInspect intake screens, hose clamps, and thermostat; verify impeller condition.\u003c\/td\u003e\n        \u003ctd\u003eWater pump kit, intake screen, hoses, thermostat\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration or power loss\u003c\/td\u003e\n        \u003ctd\u003eCheck propeller condition, fuel quality, and filter restriction; verify ignition timing and plug condition.\u003c\/td\u003e\n        \u003ctd\u003eFuel filter, spark plugs, propeller hardware\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting or rough idle\u003c\/td\u003e\n        \u003ctd\u003eConfirm battery voltage and cable integrity; inspect plugs and ignition leads; look for water in fuel.\u003c\/td\u003e\n        \u003ctd\u003eSpark plugs, starter\/solenoid, fuel filter\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise or metal in gear oil\u003c\/td\u003e\n        \u003ctd\u003eCheck gear oil level\/condition; inspect for leaking propshaft\/driveshaft seals.\u003c\/td\u003e\n        \u003ctd\u003eLower unit seal kit, drain\/fill seals, bearings\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCharging warning or low voltage\u003c\/td\u003e\n        \u003ctd\u003eVerify belt tension, alternator output, and wiring connections\/grounds.\u003c\/td\u003e\n        \u003ctd\u003eAlternator, belt, rectifier\/regulator\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"faq\" style=\"padding:10px 0;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable between different years or platforms?\u003c\/summary\u003e\n    \u003cp\u003eSome service parts carry over, but OMC had variations across carb vs. EFI engines and Cobra vs. King Cobra sterndrives. Always confirm engine model\/serial and drive model\/year before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhen should the impeller be replaced?\u003c\/summary\u003e\n    \u003cp\u003eAs a rule, replace every two seasons or sooner if you see weak flow, high temps at idle, or if you operate in sandy\/silty water. Replace the full kit if the housing is scored.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should the gear oil be changed?\u003c\/summary\u003e\n    \u003cp\u003eChange sterndrive gear oil every 100 hours or annually. Inspect the magnetic plug and oil for metal or water intrusion and renew drain\/fill seals.\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\u003eProvide the engine model and serial, driveline type (Cobra\/King Cobra), gear ratio if known, and clear photos of the nameplate and the old part. This ensures we match the correct components.\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? Browse the main Johnson\/Evinrude\/OMC collection and filter by horsepower, year, and model to quickly narrow your 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 #0b66c3;border-radius:6px;text-decoration:none;color:#0b66c3;\"\u003eShop Johnson\/Evinrude\/OMC Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px;color:#444;\"\u003eIf you’re unsure about your model, send us a photo of the nameplate and the part you need and we’ll help verify compatibility.\u003c\/p\u003e\n\u003c\/section\u003e","products":[{"product_id":"thermostat-kit-fits-volvo-penta-4-3l-8-2l-omc-cobra-4-3l-5-8l-replaces-0769578-3853983-3852111-0986506","title":"140°F Thermostat Kit for OMC Cobra and Volvo Penta 7.4L \u0026 8.2L – Replaces 3853983, 0769578, 0986506","description":"\u003cstyle\u003e\n\/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n.ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\/* Base table styles *\/\ntable.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\ntable.ss-table th, table.ss-table td { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\ntable.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n\/* Small screen optimization *\/\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 140°F (60°C) aftermarket thermostat kit is designed for specified OMC Cobra stern-drive and Volvo Penta stern-drive applications. The documented fitment is limited to 7.4L engines from 1994–1998 and 8.2L engines from 1998. Confirm the engine model, year, original thermostat temperature, and part numbers before ordering.\u003c\/p\u003e\n\u003cp\u003eThe kit replaces the thermostat reference 3853983 and is listed with OMC and Volvo Penta reference numbers 0769578 and 0986506. Sierra Marine 18-3676 is the corresponding 140°F thermostat kit reference.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e140°F (60°C) thermostat opening temperature.\u003c\/li\u003e\n\u003cli\u003eAftermarket replacement for the specified marine stern-drive cooling applications.\u003c\/li\u003e\n\u003cli\u003eKit includes the thermostat, thermostat gasket, and O-ring.\u003c\/li\u003e\n\u003cli\u003eComponent references are provided for identification and fitment verification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n\u003cp\u003eUse the references below to compare the replacement kit with the part installed on your engine. Part-number references do not replace verification of the complete model and year application.\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\u003eReference type\u003c\/th\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003cth\u003eDescription\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOMC \/ Volvo Penta reference\u003c\/td\u003e\n\u003ctd\u003e3853983\u003c\/td\u003e\n\u003ctd\u003e140°F thermostat reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOMC Cobra reference\u003c\/td\u003e\n\u003ctd\u003e0769578\u003c\/td\u003e\n\u003ctd\u003eThermostat kit reference listed by the company catalog\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOMC Cobra reference\u003c\/td\u003e\n\u003ctd\u003e0986506\u003c\/td\u003e\n\u003ctd\u003eThermostat kit reference listed by the company catalog\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSierra Marine reference\u003c\/td\u003e\n\u003ctd\u003e18-3676\u003c\/td\u003e\n\u003ctd\u003e140°F thermostat kit reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermostat component\u003c\/td\u003e\n\u003ctd\u003e3853983\u003c\/td\u003e\n\u003ctd\u003eThermostat included in the kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGasket component\u003c\/td\u003e\n\u003ctd\u003e3852111\u003c\/td\u003e\n\u003ctd\u003eThermostat gasket included in the kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eO-ring component\u003c\/td\u003e\n\u003ctd\u003e3852071\u003c\/td\u003e\n\u003ctd\u003eO-ring included in the kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eEngine Compatibility\u003c\/h2\u003e\n\u003cp\u003eThe following applications are documented for this 140°F thermostat kit. Do not extend these applications to other engine sizes, years, or thermostat temperatures without confirming the applicable service information.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n\u003ctable class=\"ss-table\" aria-label=\"Engine Compatibility\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand \/ drive type\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eApplication notes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOMC Cobra stern drive\u003c\/td\u003e\n\u003ctd\u003e7.4L V8\u003c\/td\u003e\n\u003ctd\u003e1994–1998\u003c\/td\u003e\n\u003ctd\u003e4-Stroke gasoline\u003c\/td\u003e\n\u003ctd\u003e140°F thermostat kit application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta stern drive\u003c\/td\u003e\n\u003ctd\u003e7.4 GL, 7.4 Gi, 7.4 GSi\u003c\/td\u003e\n\u003ctd\u003eVerify by engine model and year\u003c\/td\u003e\n\u003ctd\u003e4-Stroke gasoline\u003c\/td\u003e\n\u003ctd\u003eCompany-listed model family; confirm the original part before purchase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOMC Cobra \/ Volvo Penta stern drive\u003c\/td\u003e\n\u003ctd\u003e8.2L V8\u003c\/td\u003e\n\u003ctd\u003e1998\u003c\/td\u003e\n\u003ctd\u003e4-Stroke gasoline\u003c\/td\u003e\n\u003ctd\u003e140°F thermostat kit application\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVolvo Penta stern drive\u003c\/td\u003e\n\u003ctd\u003e8.2 GL, 8.2 GSi\u003c\/td\u003e\n\u003ctd\u003eVerify by engine model and year\u003c\/td\u003e\n\u003ctd\u003e4-Stroke gasoline\u003c\/td\u003e\n\u003ctd\u003eCompany-listed model family; confirm the original part before purchase\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 available catalog evidence specifically identifies the 7.4L application as 1994–1998 and the 8.2L application as 1998. The kit should not be described as fitting all 4.3L, 5.0L, 5.7L, 5.8L, 8.1L, or 8.2L engines without an applicable model-specific confirmation.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n\u003cdt\u003eProduct type\u003c\/dt\u003e\n\u003cdd\u003eThermostat kit\u003c\/dd\u003e\n\u003cdt\u003eThermostat temperature\u003c\/dt\u003e\n\u003cdd\u003e140°F \/ 60°C opening temperature\u003c\/dd\u003e\n\u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eMarine gasoline stern-drive cooling systems\u003c\/dd\u003e\n\u003cdt\u003eReplacement type\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement\u003c\/dd\u003e\n\u003cdt\u003ePrimary thermostat reference\u003c\/dt\u003e\n\u003cdd\u003e3853983\u003c\/dd\u003e\n\u003cdt\u003eDocumented engine range\u003c\/dt\u003e\n\u003cdd\u003e7.4L, 1994–1998; 8.2L, 1998\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 140°F (60°C) thermostat\u003c\/li\u003e\n\u003cli\u003e1 × thermostat gasket, reference 3852111\u003c\/li\u003e\n\u003cli\u003e1 × O-ring, reference 3852071\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe included gasket and O-ring are kit components. Their availability as separate replacement parts does not change the package contents of this thermostat kit.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eAllow the engine to cool completely and disconnect the battery before starting work.\u003c\/li\u003e\n\u003cli\u003eClose or isolate the applicable cooling-water and coolant sources according to the engine manufacturer's service procedure.\u003c\/li\u003e\n\u003cli\u003eRemove the thermostat housing cover and note the installed thermostat orientation.\u003c\/li\u003e\n\u003cli\u003eRemove the old thermostat, gasket, and O-ring. Clean the mating surfaces without damaging the housing.\u003c\/li\u003e\n\u003cli\u003eInstall the new thermostat in the same orientation as the original component.\u003c\/li\u003e\n\u003cli\u003eFit the supplied gasket and O-ring in the locations specified for your engine model.\u003c\/li\u003e\n\u003cli\u003eReinstall the housing cover and tighten fasteners to the engine manufacturer's specified torque.\u003c\/li\u003e\n\u003cli\u003eRestore the cooling system, start the engine, and check for leaks and abnormal temperature behavior.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eInstallation procedures can vary between engine models. Use the applicable factory service information for torque values, coolant draining, refill, and bleeding procedures.\u003c\/p\u003e\n\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 kit is listed as a 140°F (60°C) thermostat kit. Verify that your engine requires this temperature before installation.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich engines are documented for this kit?\u003c\/summary\u003e\n\u003cp\u003eThe company catalog documents 7.4L applications from 1994–1998 and 8.2L applications from 1998. It also lists Volvo Penta 7.4 GL, 7.4 Gi, 7.4 GSi, 8.2 GL, and 8.2 GSi model families. Confirm the exact engine model, year, and original part number.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat parts are included?\u003c\/summary\u003e\n\u003cp\u003eThe kit includes one thermostat, one thermostat gasket, and one O-ring. The component references are thermostat 3853983, gasket 3852111, and O-ring 3852071.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this an OEM thermostat?\u003c\/summary\u003e\n\u003cp\u003eNo. This listing is for an aftermarket replacement kit. The OEM and aftermarket reference numbers are supplied for identification and compatibility comparison only.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this kit on a 4.3L, 5.0L, 5.7L, or 5.8L engine?\u003c\/summary\u003e\n\u003cp\u003eThose applications are not confirmed for this specific kit by the company record used for this listing. Match your exact engine model, year, thermostat temperature, and original part number before ordering.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat are common signs of a thermostat problem?\u003c\/summary\u003e\n\u003cp\u003ePossible symptoms include overheating, an engine that runs unusually cool, unstable temperature readings, or coolant leakage near the thermostat housing. Diagnose the complete cooling system before replacing the thermostat.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eWork only on a cool engine and follow the applicable marine engine service procedure.\u003c\/li\u003e\n\u003cli\u003eDo not rely on engine size alone for fitment; verify model, year, thermostat temperature, and original part number.\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 cooling-system procedure or engine-specific requirements are uncertain.\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 Parts Support\u003c\/strong\u003e — We provide replacement components for marine maintenance and repair applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment-Focused Listings\u003c\/strong\u003e — Product references and documented applications are presented to help customers verify compatibility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePractical Replacement Solutions\u003c\/strong\u003e — Aftermarket components are offered for routine marine service needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723970744635,"sku":"23TH018","price":30.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Thermostat_Kit_for_Volvo_Penta_43L_50L_57L_74L_81L_0769578_3853983_3852111___________3853983_-_JLM_MARINE-8291118.jpg?v=1763038813"}],"url":"https:\/\/seasierra.com\/collections\/omc-4-stroke-8-2l-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}