{"title":"Johnson 65-140HP 2-Stroke Outboard Marine Engine Parts","description":"\u003csection id=\"hero\" style=\"padding:16px; border:1px solid #e5e7eb; border-radius:8px;\"\u003e\n  \u003cp\u003eThis page is for Johnson 2‑Stroke 65–140HP outboard engines. Use it to find compatible parts and practical service information. You’ll get maintenance tips, common replacement parts, and troubleshooting guidance. You can also browse the main Johnson\/Evinrude collection. Scroll to the bottom to start browsing parts, and on the collection page use the “Filter \u0026amp; Sort” controls to narrow by horsepower, year range, and part category.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude\" style=\"display:inline-block; padding:10px 14px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eBrowse All Johnson\/Evinrude Parts\u003c\/a\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"identify-model\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eHow to Identify Your 65–140HP Model\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eNameplate location: Look on the transom clamp bracket or swivel bracket for the model\/serial plate. A decal with the model code may also be on the engine mid‑section.\u003c\/li\u003e\n    \u003cli\u003eReading the model code: Johnson 2‑stroke codes typically include horsepower, year suffix, and shaft length (S=15\", L=20\", XL=25\"). Remote\/tiller and electric\/manual start options may also be encoded.\u003c\/li\u003e\n    \u003cli\u003ePlatform differences: 65–75HP models are usually inline‑3 2‑strokes, while 85–140HP are V4 2‑strokes (older cross‑flow vs later loop‑charged designs). Many parts interchange within each platform but not across them.\u003c\/li\u003e\n    \u003cli\u003eGearcase clues: Midrange 3‑cyl engines often use a smaller gearcase than V4 models. Prop shaft diameter and hub style can differ—verify before ordering propellers or hardware.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"engine-overview\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003ePlatform Overview\u003c\/h2\u003e\n  \u003ch3\u003eInline‑3 (65–75HP) Carbureted 2‑Stroke\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 #e5e7eb;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eInline‑3 carbureted 2‑stroke, typically 56 cu. in. class, small gearcase on many models.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e65 Commercial, 70 3‑cyl, 75 3‑cyl (various year suffixes and shaft lengths).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eLight weight, strong hole‑shot, simple maintenance.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eWater pump and gearcase seal parts differ from V4. Verify prop hub style and shaft length (L\/XL).\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003ch3\u003eV4 (85–140HP) 2‑Stroke – Cross‑Flow and Loop‑Charged\u003c\/h3\u003e\n  \u003ctable style=\"width:100%; border-collapse:collapse; margin-top:12px;\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eFeature\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eDescription\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eConfiguration\u003c\/td\u003e\n        \u003ctd\u003eV4 carbureted 2‑stroke; earlier cross‑flow, later 60°\/90° loop‑charged variants with larger gearcase.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eCommon Models\u003c\/td\u003e\n        \u003ctd\u003e85, 88, 90, 100, 110, 115, 120, 125, 130, 140HP (various year codes and shaft lengths).\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAdvantages\u003c\/td\u003e\n        \u003ctd\u003eBroader powerband, strong mid‑range torque, robust gearcase options.\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eNotes\u003c\/td\u003e\n        \u003ctd\u003eSome prop shafts and bearing carriers vary (e.g., 1‑3\/16\" vs 1‑1\/4\"). Match impeller\/thermostat style to cross‑flow vs loop‑charged design.\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:16px;\"\u003e\n  \u003ch2\u003eRoutine Maintenance \u0026amp; Service Parts\u003c\/h2\u003e\n  \u003cp\u003eIntervals below are general guidelines for Johnson 2‑stroke midrange\/V4 outboards. Always follow the official service manual for your exact model 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 #e5e7eb;\"\u003eItem\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eInterval*\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eRemarks\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eParts Link\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eLower unit gear oil\u003c\/td\u003e\n        \u003ctd\u003eEvery 100 hrs or annually\u003c\/td\u003e\n        \u003ctd\u003eInspect for water\/metal; replace drain gaskets; reseal if contamination is found.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-lower-unit-seal-kits\"\u003eLower Unit Seal Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eSpark plugs\u003c\/td\u003e\n        \u003ctd\u003eInspect every 50 hrs; replace 100–200 hrs\u003c\/td\u003e\n        \u003ctd\u003eUse correct heat range and gap; replace more often with heavy trolling.\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‑separating filter\u003c\/td\u003e\n        \u003ctd\u003eInspect every 50 hrs; replace annually\u003c\/td\u003e\n        \u003ctd\u003eKeep fuel clean to prevent lean conditions and detonation.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/fuel-filters-1\"\u003eFuel Filters\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eWater pump impeller or kit\u003c\/td\u003e\n        \u003ctd\u003eEvery 2–3 seasons (annually in sandy\/silty water)\u003c\/td\u003e\n        \u003ctd\u003eCritical for cooling; replace housing\/plate as needed.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-water-pump-repair-kits\"\u003eWater Pump Repair Kits\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eAnodes (zincs)\u003c\/td\u003e\n        \u003ctd\u003eInspect every 50 hrs; replace when 50% eroded\u003c\/td\u003e\n        \u003ctd\u003eMatch anode material to water type (salt\/brackish\/fresh).\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-anodes\"\u003eJohnson\/Evinrude\/OMC Anodes\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eThermostat(s)\u003c\/td\u003e\n        \u003ctd\u003eInspect\/replace every 2–3 seasons\u003c\/td\u003e\n        \u003ctd\u003eStuck thermostats cause cold‑seizing or overheating.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude\"\u003eJohnson\/Evinrude Parts (All)\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eOil mixing \/ injection\u003c\/td\u003e\n        \u003ctd\u003eEach service\u003c\/td\u003e\n        \u003ctd\u003ePremix 50:1 (unless equipped with oil injection). For oil‑injection models, inspect hoses, clamps, and pump output.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/hoses\"\u003eHoses\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePropeller \u0026amp; hardware inspection\u003c\/td\u003e\n        \u003ctd\u003eSeasonally\u003c\/td\u003e\n        \u003ctd\u003eCheck hub, thrust washer, nut, and cotter; remove line from prop shaft.\u003c\/td\u003e\n        \u003ctd\u003e\u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-propellers\"\u003eJohnson\/Evinrude\/OMC Propellers\u003c\/a\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"common-parts\" style=\"padding:16px;\"\u003e\n  \u003ch2\u003eFrequently Used Parts Categories\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eRoutine Service: \u003ca href=\"https:\/\/seasierra.com\/collections\/bombardier-service-maintenance-kits\"\u003eJohnson\/Evinrude\/OMC Service \u0026amp; Maintenance Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eCooling System: \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-water-pump-repair-kits\"\u003eWater Pump Repair Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003eGearcase \u0026amp; Seals: \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude-omc-lower-unit-seal-kits\"\u003eLower Unit Seal Kits\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\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\/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  \u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"troubleshooting\" style=\"padding:16px;\"\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 #e5e7eb;\"\u003eSymptom\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\u003eCheck First\u003c\/th\u003e\n        \u003cth style=\"text-align:left; border-bottom:1px solid #e5e7eb;\"\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\u003eClogged intake screen, worn impeller, stuck thermostat\u003c\/td\u003e\n        \u003ctd\u003eWater pump kit, thermostat, intake screen\/anodes\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003ePoor acceleration \/ power loss\u003c\/td\u003e\n        \u003ctd\u003eFouled plugs, restricted fuel filter, prop hub slippage\u003c\/td\u003e\n        \u003ctd\u003eSpark plugs, fuel filter, propeller\/hub kit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eHard starting \/ rough idle\u003c\/td\u003e\n        \u003ctd\u003eOld fuel, incorrect plug gap, air leaks on fuel lines\u003c\/td\u003e\n        \u003ctd\u003eSpark plugs, fuel system hoses\/clamps, fuel pump service kit\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eExcessive smoke (2‑stroke)\u003c\/td\u003e\n        \u003ctd\u003eRich idle mixture, over‑oiling, low engine temperature\u003c\/td\u003e\n        \u003ctd\u003eSpark plugs, thermostat, fuel\/oil system inspection items\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eGearcase noise \/ metal in gear oil\u003c\/td\u003e\n        \u003ctd\u003eLow oil level, water intrusion, worn bearings\/seals\u003c\/td\u003e\n        \u003ctd\u003eGear oil seals, carrier seals, 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:16px;\"\u003e\n  \u003ch2\u003eFAQs\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eAre parts interchangeable across years or between 3‑cyl and V4 engines?\u003c\/summary\u003e\n    \u003cp\u003eSome service parts are shared within each platform (3‑cyl vs V4), but many items—especially gearcase, ignition, and cooling components—are year‑ and platform‑specific. Confirm your full model code before ordering.\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\u003eReplace every 2–3 seasons, or annually if you run in sandy\/silty water or if the motor has shown any overheat symptoms.\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\u003eAt least once per season or every 100 hours. Check for water or metal; contamination indicates a seal issue that should be addressed promptly.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat information do you need to confirm compatibility?\u003c\/summary\u003e\n    \u003cp\u003ePlease provide the model number, serial number, shaft length (S\/L\/XL), and a photo of the nameplate. Noting whether your engine is cross‑flow or loop‑charged (V4) or inline‑3 helps target the correct parts.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/section\u003e\n\n\u003csection id=\"cta\" style=\"padding:16px; border-top:1px solid #e5e7eb;\"\u003e\n  \u003cp\u003eReady to find parts by horsepower, year, and model? Browse the main Johnson\/Evinrude collection.\u003c\/p\u003e\n  \u003ca href=\"https:\/\/seasierra.com\/collections\/johnson-evinrude\" style=\"display:inline-block; padding:10px 14px; background:#0ea5e9; color:#fff; text-decoration:none; border-radius:6px;\"\u003eShop Johnson\/Evinrude Parts\u003c\/a\u003e\n  \u003cp style=\"margin-top:8px; color:#475569;\"\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-johnson-evinrude-v4-crossflow-65-140hp-replaces-18-3673-340975-340976","title":"Thermostat for Evinrude \/ Johnson V4 Crossflow – 143°F (62°C), Replaces 18-3673","description":"\u003csection\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cp\u003eThis replacement thermostat is designed for Evinrude and Johnson outboard engines using the V4 Crossflow cooling-system design. It is rated at 143°F (62°C) and helps the engine maintain its intended operating temperature when the original thermostat is worn, stuck, or no longer regulating coolant flow correctly.\u003c\/p\u003e\n\u003cp\u003eThe thermostat is made with copper and is listed as a replacement for reference number 18-3673. Confirm the engine model, cooling-system configuration, and original thermostat dimensions before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e143°F (62°C) thermostat rating.\u003c\/li\u003e\n  \u003cli\u003eFor Evinrude \/ Johnson V4 Crossflow outboard applications.\u003c\/li\u003e\n  \u003cli\u003eCopper construction.\u003c\/li\u003e\n  \u003cli\u003eReplacement reference: 18-3673.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstyle\u003e\n  .ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n  table.ss-table { width:100%; border-collapse:collapse; min-width:520px; }\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\n\u003ch2\u003ePart Number Reference\u003c\/h2\u003e\n\u003cp\u003eUse the following reference number when comparing the thermostat with your existing part.\u003c\/p\u003e\n\u003cdiv class=\"ss-table-wrap\"\u003e\n  \u003ctable class=\"ss-table\" aria-label=\"Part Number Reference\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eReference Type\u003c\/th\u003e\n        \u003cth\u003ePart Number\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eReplacement reference\u003c\/td\u003e\n        \u003ctd\u003e18-3673\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\u003eThis thermostat is listed for Evinrude and Johnson V4 Crossflow outboard applications. V4 Crossflow models can vary by horsepower, year, serial number, and cooling-system configuration, so verify the exact application against your engine identification label and the thermostat removed from the engine before purchase.\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\u003c\/th\u003e\n        \u003cth\u003eEngine Configuration\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eApplication Check\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eEvinrude \/ Johnson\u003c\/td\u003e\n        \u003ctd\u003eV4 Crossflow\u003c\/td\u003e\n        \u003ctd\u003eNot specified\u003c\/td\u003e\n        \u003ctd\u003eConfirm model, year, serial number, and original thermostat before ordering.\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cdl\u003e\n  \u003cdt\u003eProduct Type\u003c\/dt\u003e\n  \u003cdd\u003eReplacement thermostat\u003c\/dd\u003e\n  \u003cdt\u003eBrand Application\u003c\/dt\u003e\n  \u003cdd\u003eEvinrude \/ Johnson Outboard\u003c\/dd\u003e\n  \u003cdt\u003eEngine Configuration\u003c\/dt\u003e\n  \u003cdd\u003eV4 Crossflow\u003c\/dd\u003e\n  \u003cdt\u003eMaterial\u003c\/dt\u003e\n  \u003cdd\u003eCopper\u003c\/dd\u003e\n  \u003cdt\u003eThermostat Rating\u003c\/dt\u003e\n  \u003cdd\u003e143°F (62°C)\u003c\/dd\u003e\n  \u003cdt\u003eReplacement Reference\u003c\/dt\u003e\n  \u003cdd\u003e18-3673\u003c\/dd\u003e\n\u003c\/dl\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x Replacement thermostat\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eHoses, gaskets, springs, valves, grommets, clamps, and other cooling-system components are not identified as included with this product. Check the package received before installation.\u003c\/p\u003e\n\n\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n\u003col\u003e\n  \u003cli\u003eAllow the engine to cool completely before beginning work.\u003c\/li\u003e\n  \u003cli\u003eDisconnect the battery and follow the safety procedures in the engine service manual.\u003c\/li\u003e\n  \u003cli\u003eRemove the thermostat housing cover and note the orientation of the original thermostat and sealing surfaces.\u003c\/li\u003e\n  \u003cli\u003eRemove the old thermostat and clean the mating surfaces carefully.\u003c\/li\u003e\n  \u003cli\u003eInstall the replacement thermostat in the correct orientation using the appropriate service-manual procedure and sealing components for your engine.\u003c\/li\u003e\n  \u003cli\u003eReinstall the housing cover evenly and tighten fasteners to the manufacturer's specified torque.\u003c\/li\u003e\n  \u003cli\u003eRun the engine in a safe test environment and check for leaks and proper cooling-system operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat does the 143°F rating mean?\u003c\/summary\u003e\u003cp\u003eThe 143°F (62°C) rating identifies the thermostat's specified temperature rating. It is important to match this rating and the physical design to the requirements of your particular engine.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWill this fit every Evinrude or Johnson V4 engine?\u003c\/summary\u003e\u003cp\u003eNo universal fitment is claimed. This product is listed for the V4 Crossflow configuration, but exact fitment may vary by model, year, serial number, and cooling-system arrangement. Verify those details before ordering.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eDoes this include hoses or a complete cooling-system service kit?\u003c\/summary\u003e\u003cp\u003eNo. This listing is for one replacement thermostat. Hoses and other cooling-system components are not identified as included.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat are common signs of a faulty thermostat?\u003c\/summary\u003e\u003cp\u003ePossible signs include overheating, running cooler than expected, unstable operating temperature, or abnormal temperature readings. Other cooling-system faults can produce similar symptoms, so inspect the complete cooling system before replacing parts.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eShould installation follow a service manual?\u003c\/summary\u003e\u003cp\u003eYes. Use the service manual for your exact engine to confirm installation orientation, sealing requirements, fastener torque, and post-installation testing.\u003c\/p\u003e\u003c\/details\u003e\n\n\u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eInstall only with the engine completely cool and follow the applicable service-manual safety instructions.\u003c\/li\u003e\n  \u003cli\u003eVerify the engine model, year, serial number, thermostat rating, dimensions, and reference number before ordering.\u003c\/li\u003e\n  \u003cli\u003eThis listing is for one thermostat; hoses and additional cooling-system components are not included unless separately stated.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended when the correct procedure or application is uncertain.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eMarine replacement parts selected for practical repair and maintenance applications.\u003c\/li\u003e\n  \u003cli\u003eClear product information to help customers compare replacement references and engine configurations.\u003c\/li\u003e\n  \u003cli\u003eSupport focused on helping customers verify application details before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723981295931,"sku":"23TK468","price":37.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Thermostat_Kit_with_Hoses_for_Johnson_Evinrude_V4_Crossflow_85-140_HP_Outboard_Engines_65_80_90_Jet____18-3673_-_JLM_MARINE-8287004.png?v=1763039258"},{"product_id":"thermostat-kit-fits-johnson-evinrude-v4-crossflow-65-140-hp-replaces-434841-18-3673","title":"Thermostat Kit for Johnson\/Evinrude V4 Crossflow Outboard Engines, 143°F, 65–140 HP","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 { padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top; }\n  table.ss-table th { white-space:nowrap; word-break:normal; letter-spacing:normal; font-weight:600; background:#f8fafc; }\n  @media (max-width:480px){ table.ss-table th, table.ss-table td { padding:8px 10px; font-size:14px; } }\n\u003c\/style\u003e\n\u003csection\u003e\n  \u003ch2\u003eProduct Details\u003c\/h2\u003e\n  \u003cp\u003eThis complete aftermarket thermostat kit is designed for Johnson and Evinrude V4 Crossflow outboard engines using a dual-thermostat cooling system. The thermostats are rated at \u003cstrong\u003e143°F (62°C)\u003c\/strong\u003e and are intended for applications ranging from 65 HP and 80 HP Jet models through 80–140 HP V4 Crossflow engines. Confirm the engine's Crossflow design and the required parts before ordering.\u003c\/p\u003e\n  \u003cp\u003eThe kit uses two 143°F thermostats and includes the associated housing gaskets, grommets, thermostat gaskets, and pressure-relief springs required for a complete thermostat service. It is an aftermarket replacement and is not an OEM-branded component.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eFor Johnson\/Evinrude V4 Crossflow outboard engines.\u003c\/li\u003e\n    \u003cli\u003eTwo stainless-steel thermostats with a 143°F (62°C) rating.\u003c\/li\u003e\n    \u003cli\u003eService components are supplied for both thermostat positions.\u003c\/li\u003e\n    \u003cli\u003eNot identified for 60° V4 or other non-Crossflow cooling systems.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003ePart Number References\u003c\/h2\u003e\n  \u003cp\u003eThese references identify the aftermarket kit or cataloged replacement references. Verify the application using your engine model and service information before purchase.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number References\"\u003e\n      \u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand or Reference\u003c\/th\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003cth\u003eUse\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003ctd\u003e18-3673\u003c\/td\u003e\n\u003ctd\u003eThermostat kit reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eGLM\u003c\/td\u003e\n\u003ctd\u003e13270\u003c\/td\u003e\n\u003ctd\u003eAftermarket kit reference\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eSierra Marine\u003c\/td\u003e\n\u003ctd\u003e18-3673D\u003c\/td\u003e\n\u003ctd\u003eReference listed for the 18-3673 kit\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\u003eThis kit is listed for Johnson\/Evinrude \u003cstrong\u003eV4 Crossflow\u003c\/strong\u003e outboard engines. The company application information identifies 65 HP, 80 HP Jet, and 80–140 HP applications. Exact fitment can vary by model, year, and engine configuration, so compare the original thermostat assembly and consult the appropriate service manual before installation.\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\u003c\/th\u003e\n\u003cth\u003eEngine Architecture\u003c\/th\u003e\n\u003cth\u003eApplication Range\u003c\/th\u003e\n\u003cth\u003eStroke\u003c\/th\u003e\n\u003cth\u003eThermostat Rating\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003eV4 Crossflow\u003c\/td\u003e\n\u003ctd\u003e65 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e143°F (62°C)\u003c\/td\u003e\n\u003ctd\u003eVerify the individual model and cooling-system configuration.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003eV4 Crossflow\u003c\/td\u003e\n\u003ctd\u003e80 HP Jet\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e143°F (62°C)\u003c\/td\u003e\n\u003ctd\u003eConfirm the engine is a V4 Crossflow design.\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n\u003ctd\u003eV4 Crossflow\u003c\/td\u003e\n\u003ctd\u003e80–140 HP\u003c\/td\u003e\n\u003ctd\u003e2-Stroke\u003c\/td\u003e\n\u003ctd\u003e143°F (62°C)\u003c\/td\u003e\n\u003ctd\u003eCheck the model number and original thermostat parts before ordering.\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eMarine outboard thermostat kit\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003eJohnson\/Evinrude V4 Crossflow engines\u003c\/dd\u003e\n    \u003cdt\u003eThermostat Quantity\u003c\/dt\u003e\n\u003cdd\u003e2\u003c\/dd\u003e\n    \u003cdt\u003eThermostat Rating\u003c\/dt\u003e\n\u003cdd\u003e143°F (62°C)\u003c\/dd\u003e\n    \u003cdt\u003eThermostat Material\u003c\/dt\u003e\n\u003cdd\u003eStainless steel\u003c\/dd\u003e\n    \u003cdt\u003eCooling System\u003c\/dt\u003e\n\u003cdd\u003eDual-thermostat system\u003c\/dd\u003e\n    \u003cdt\u003eProduct Status\u003c\/dt\u003e\n\u003cdd\u003eAftermarket replacement\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\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e 143°F stainless-steel thermostats\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Housing gaskets\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Grommets\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Thermostat gaskets\u003c\/li\u003e\n    \u003cli\u003e\n\u003cspan style=\"color:#d0021b;\"\u003e2 x\u003c\/span\u003e Pressure-relief springs\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery, place the engine in a stable position, and allow it to cool completely.\u003c\/li\u003e\n    \u003cli\u003eLocate the thermostat housings and record the orientation of the existing thermostats, gaskets, grommets, and pressure-relief components.\u003c\/li\u003e\n    \u003cli\u003eRemove the thermostat covers and carefully remove the old service parts.\u003c\/li\u003e\n    \u003cli\u003eClean the cover and cylinder-head mating surfaces. Remove old gasket material and check for corrosion or damage.\u003c\/li\u003e\n    \u003cli\u003eInstall the new grommets, pressure-relief springs, housing gaskets, thermostat gaskets, and thermostats in the correct positions and orientation.\u003c\/li\u003e\n    \u003cli\u003eReinstall the covers and tighten the fasteners according to the engine manufacturer's service-manual procedure and torque specifications.\u003c\/li\u003e\n    \u003cli\u003eRun the engine using the proper water supply, check for leaks, and confirm normal cooling-system operation before returning the boat to service.\u003c\/li\u003e\n  \u003c\/ol\u003e\n  \u003cp\u003eInstallation should be performed by a qualified marine technician when the correct component orientation or engine-specific procedure is uncertain.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\u003csummary\u003eHow do I confirm that this kit fits my engine?\u003c\/summary\u003e\u003cp\u003eConfirm that the engine is a Johnson or Evinrude V4 Crossflow model and compare the original thermostat assembly with the kit contents. The listed applications include 65 HP, 80 HP Jet, and 80–140 HP engines, but exact fitment may depend on the model and configuration.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat thermostat temperature does this kit use?\u003c\/summary\u003e\u003cp\u003eThe thermostats are rated at 143°F (62°C). Use the temperature rating specified for your engine and do not substitute a different rating without guidance from the service manual.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhy are there two thermostats?\u003c\/summary\u003e\u003cp\u003eThe listed V4 Crossflow application uses a dual-thermostat arrangement. The kit includes two thermostats and matching service components for the two thermostat positions.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWhat components are included besides the thermostats?\u003c\/summary\u003e\u003cp\u003eThe kit includes two housing gaskets, two grommets, two thermostat gaskets, and two pressure-relief springs, in addition to the two 143°F thermostats.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eWill this fit a 60° V4 or Looper engine?\u003c\/summary\u003e\u003cp\u003eThis product is identified for V4 Crossflow engines. Do not assume compatibility with a 60° V4, Looper, or another cooling-system design. Verify the engine architecture and part requirements first.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eIs this an OEM component?\u003c\/summary\u003e\u003cp\u003eNo. This is an aftermarket replacement kit intended for the listed Johnson\/Evinrude V4 Crossflow applications.\u003c\/p\u003e\u003c\/details\u003e\n  \u003cdetails\u003e\u003csummary\u003eShould I replace the seals and springs at the same time?\u003c\/summary\u003e\u003cp\u003eYes. The kit is supplied with the related gaskets, grommets, and pressure-relief springs so the thermostat service can be completed with new service components rather than relying on worn or damaged parts.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/section\u003e\n\u003csection\u003e\n  \u003ch2\u003eSafety \u0026amp; Important Information\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eWork only on a cool engine and follow the engine manufacturer's service procedures.\u003c\/li\u003e\n    \u003cli\u003eVerify the V4 Crossflow architecture, model information, and original parts before ordering.\u003c\/li\u003e\n    \u003cli\u003eDo not use this listing to substitute for the engine service manual or a qualified technician's fitment confirmation.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM-branded component.\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 Parts Focus\u003c\/strong\u003e — Replacement components for common outboard maintenance and repair applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eApplication-Focused Listings\u003c\/strong\u003e — Product information is organized around engine architecture, component function, and service requirements.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePractical Service Support\u003c\/strong\u003e — Always compare the original component and consult the applicable service documentation before installation.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723981328699,"sku":"22TK026","price":37.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/Thermostat_Kit_for_Johnson_Evinrude_V4_Crossflow_Outboard_Engines_65_80_Jet_85-140_HP___18-3673_-_JLM_MARINE-8286997.png?v=1763039260"}],"url":"https:\/\/seasierra.com\/collections\/johnson-65-140hp-2-stroke-outboard-marine-engine-parts.oembed","provider":"SeaSierra","version":"1.0","type":"link"}