{"product_id":"thermostat-kit-143-fits-johnson-evinrude-60-75-hp-replaces-396987-382385","title":"Thermostat Kit 143° – Fits Johnson\/Evinrude 60-75 HP (Replaces 396987, 382385)","description":"\u003cstyle\u003e\n\/* Outer container allows horizontal scrolling (with iOS momentum) *\/\n.ss-table-wrap { overflow-x:auto; -webkit-overflow-scrolling:touch; }\n\n\/* Base table styles *\/\ntable.ss-table { width:100%; border-collapse:collapse; min-width:640px; }\ntable.ss-table th, table.ss-table td {\n  padding:10px 12px; border:1px solid #e5e7eb; text-align:left; vertical-align:top;\n}\n\n\/* Key: prevent wrapping, word breaks, and vertical text in headers *\/\ntable.ss-table th {\n  white-space:nowrap;       \/* Do not wrap *\/\n  word-break:normal;        \/* Don’t break words *\/\n  letter-spacing:normal;    \/* Prevent theme styles from stretching letters *\/\n  font-weight:600;\n  background:#f8fafc;\n}\n\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 \u003cstrong\u003eThermostat Kit 143° – Fits Johnson\/Evinrude 60-75 HP\u003c\/strong\u003e is engineered for a range of 2-stroke outboard motors, including 60, 65, 70, and 75 HP models. It is designed to maintain optimal engine temperature for efficient performance in 3-cylinder and 4-cylinder loop-charged carbureted engines.\u003c\/p\u003e\n  \u003cp\u003eIt serves as a direct cross-reference for Johnson\/Evinrude parts 396987, 382385, and 0313416, as well as aftermarket equivalents Sierra 18-3669, Mallory 9-43155, and GLM 13124.\u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003eEnsures a straightforward, direct replacement installation.\u003c\/li\u003e\n    \u003cli\u003eDesigned to replace 140°F thermostats in certain legacy models.\u003c\/li\u003e\n    \u003cli\u003eKit includes thermostat, rubber ring, gasket, and washer for a complete service.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003ePart Number Matrix\u003c\/h2\u003e\n  \u003cp\u003eUse this matrix to confirm equivalent references across OEM and aftermarket.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Part Number Matrix\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003ePart Number\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n          \u003ctd\u003e396987\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n          \u003ctd\u003e382385\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n          \u003ctd\u003e0313416\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eSierra\u003c\/td\u003e\n          \u003ctd\u003e18-3669\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMallory\u003c\/td\u003e\n          \u003ctd\u003e9-43155\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eGLM\u003c\/td\u003e\n          \u003ctd\u003e13124\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eEngine \u0026amp; Model Compatibility\u003c\/h2\u003e\n  \u003cp\u003eConfirm your engine model\/year in the table below.\u003c\/p\u003e\n  \u003cp\u003eFor Johnson\/Evinrude models, compatibility is based on horsepower rating. Please verify your OEM part number, as exact model year ranges can vary.\u003c\/p\u003e\n  \u003cp\u003eFor Mercury\/Mariner engines, compatibility is determined by serial number. Check your engine's serial plate to confirm fitment.\u003c\/p\u003e\n  \u003cdiv class=\"ss-table-wrap\"\u003e\n    \u003ctable class=\"ss-table\" aria-label=\"Engine \u0026amp; Model Compatibility\"\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eBrand\u003c\/th\u003e\n          \u003cth\u003eModel\u003c\/th\u003e\n          \u003cth\u003eRated HP\u003c\/th\u003e\n          \u003cth\u003eStroke\u003c\/th\u003e\n          \u003cth\u003eOEM Part No.\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\u003eVarious\u003c\/td\u003e\n          \u003ctd\u003e60\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e396987, 382385\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n          \u003ctd\u003eVarious\u003c\/td\u003e\n          \u003ctd\u003e65\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e396987, 382385\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n          \u003ctd\u003eVarious\u003c\/td\u003e\n          \u003ctd\u003e70\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e396987, 382385\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eJohnson\/Evinrude\u003c\/td\u003e\n          \u003ctd\u003eVarious\u003c\/td\u003e\n          \u003ctd\u003e75\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e396987, 382385\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e3-Cylinder Engines\u003c\/td\u003e\n          \u003ctd\u003e70\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003eSerial: A996142 and later\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e3-Cylinder Engines\u003c\/td\u003e\n          \u003ctd\u003e75\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003eSerial: C222000 and later\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e3-Cylinder Engines\u003c\/td\u003e\n          \u003ctd\u003e80, 90\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003eSerial: A996142 and later\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e4-Cylinder Engines\u003c\/td\u003e\n          \u003ctd\u003e100\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003eSerial: B209468 and later\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e4-Cylinder Engines\u003c\/td\u003e\n          \u003ctd\u003e115\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003eSerial: C100000 and later\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003ctd\u003eMercury\u003c\/td\u003e\n          \u003ctd\u003e4-Cylinder Engines\u003c\/td\u003e\n          \u003ctd\u003e125\u003c\/td\u003e\n          \u003ctd\u003e2-Stroke\u003c\/td\u003e\n          \u003ctd\u003e\u003c\/td\u003e\n          \u003ctd\u003eSerial: D283222 and later\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n  \n  \u003ch2\u003eTechnical Specs\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003eProduct Type\u003c\/dt\u003e\n\u003cdd\u003eThermostat Kit\u003c\/dd\u003e\n    \u003cdt\u003eInstallation\u003c\/dt\u003e\n\u003cdd\u003eDirect replacement\u003c\/dd\u003e\n    \u003cdt\u003eOpening Temperature\u003c\/dt\u003e\n\u003cdd\u003e122°F \/ 50°C (143° thermostat rating)\u003c\/dd\u003e\n    \u003cdt\u003eApplication\u003c\/dt\u003e\n\u003cdd\u003e3-cylinder (L3) and 4-cylinder (L4) loop-charged carbureted engines\u003c\/dd\u003e\n    \u003cdt\u003eOther Technical Attributes\u003c\/dt\u003e\n\u003cdd\u003eDesigned to replace 140°F thermostats in select models\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 Thermostat (14586)\u003c\/li\u003e\n    \u003cli\u003e1 x Rubber Ring (27-62386, 27-62386001, 27-8M0204714)\u003c\/li\u003e\n    \u003cli\u003e1 x Gasket (27-43006-8)\u003c\/li\u003e\n    \u003cli\u003e1 x Washer (12-47533)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eInstallation Notes\u003c\/h2\u003e\n  \u003col\u003e\n    \u003cli\u003eDisconnect the battery and ensure the engine is cool.\u003c\/li\u003e\n    \u003cli\u003ePlace a drain pan under the engine and drain the cooling system.\u003c\/li\u003e\n    \u003cli\u003eLocate the thermostat housing on the engine block or cylinder head.\u003c\/li\u003e\n    \u003cli\u003eCarefully remove the bolts securing the thermostat housing cover.\u003c\/li\u003e\n    \u003cli\u003eRemove the old thermostat, gasket, and rubber ring. Note their orientation.\u003c\/li\u003e\n    \u003cli\u003eThoroughly clean the mating surfaces of the housing and cover.\u003c\/li\u003e\n    \u003cli\u003eInstall the new thermostat, gasket, and seals in the correct order.\u003c\/li\u003e\n    \u003cli\u003eRe-secure the housing cover and tighten bolts to the manufacturer's specified torque.\u003c\/li\u003e\n    \u003cli\u003eRefill the cooling system with the recommended coolant.\u003c\/li\u003e\n    \u003cli\u003eStart the engine and check for leaks and proper operating temperature.\u003c\/li\u003e\n  \u003c\/ol\u003e\n  \n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if my thermostat is failing?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs of a faulty thermostat include engine overheating, running too cold (not reaching operating temperature), erratic temperature gauge readings, and increased fuel consumption. A visual inspection may show corrosion or a stuck-open\/closed valve.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this 143°F thermostat a direct replacement for my original 140°F one?\u003c\/summary\u003e\n    \u003cp\u003eYes, this kit is designed to replace both 143°F and 140°F thermostats in the compatible engine models listed. The slightly different rating is common in aftermarket parts and does not negatively affect performance.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat engines does this kit fit?\u003c\/summary\u003e\n    \u003cp\u003eThis kit is designed for a variety of 2-stroke Johnson\/Evinrude outboards (60-75 HP) and specific Mercury\/Mariner 2-stroke models based on serial number. Please consult the Engine \u0026amp; Model Compatibility table for details.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow often should I replace my outboard's thermostat?\u003c\/summary\u003e\n    \u003cp\u003eAs a preventative maintenance item, it is recommended to inspect your thermostat annually and replace it every 2-3 years, or more frequently if operating in saltwater. Always replace it if you notice signs of failure.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eOEM vs. Aftermarket?\u003c\/summary\u003e\n    \u003cp\u003eThis listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eShipping speed \u0026amp; cost\u003c\/summary\u003e\n    \u003cp\u003eWe ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWarranty \u0026amp; returns\u003c\/summary\u003e\n    \u003cp\u003eCovered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused \u0026amp; in original condition). See our policy page or reach out for instructions.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \n  \u003ch2\u003eSafety \u0026amp; Important Info\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eVerify images\/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.\u003c\/li\u003e\n    \u003cli\u003eThis is an aftermarket replacement, not an OEM component.\u003c\/li\u003e\n    \u003cli\u003eProfessional installation is recommended for safety and performance.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \n  \u003ch2\u003eAbout Sea Sierra\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePro-Grade Standards\u003c\/strong\u003e — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFast Global Fulfillment\u003c\/strong\u003e — Free standard delivery to most regions in 5–15 days.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eManufacturer-Direct Value\u003c\/strong\u003e — Fair pricing without compromising on materials or QC.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/section\u003e","brand":"SeaSierra","offers":[{"title":"Default Title","offer_id":50723980738875,"sku":"23TH613","price":65.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0826\/8673\/8747\/files\/23TH613_1_28acf846-2fd9-4e59-bb7e-33fb8feb717c.jpg?v=1763039230","url":"https:\/\/seasierra.com\/products\/thermostat-kit-143-fits-johnson-evinrude-60-75-hp-replaces-396987-382385","provider":"SeaSierra","version":"1.0","type":"link"}