{"title":"Mercury \u0026 Quicksilver Thermostats","description":"\u003cp\u003eShop Mercury and Quicksilver marine thermostats, thermostat kits and housing seals for the engine applications identified on each listing. This range includes Mercury outboards, MerCruiser engines and Quicksilver replacements for selected Yamaha, Johnson, Evinrude and OMC outboards.\u003c\/p\u003e\u003ch2\u003eChoose by engine and temperature rating\u003c\/h2\u003e\u003cp\u003eMatch the manufacturer part number, engine model and serial number. Standard- and closed-cooling systems can require different thermostats, and a shared horsepower rating does not establish compatibility. Check whether your selected item includes a housing, gasket or installation seal.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"\/collections\/mercury-quicksilver-parts\"\u003eMercury and Quicksilver parts\u003c\/a\u003e, \u003ca href=\"\/collections\/mercury-outboard-parts\"\u003eMercury outboard parts\u003c\/a\u003e or \u003ca href=\"\/collections\/mercruiser-parts\"\u003eMerCruiser parts\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"710-14586a3","title":"OEM Quicksilver 14586A3 120°F Thermostat Kit for Mercury\/Mariner 6–25hp","description":"\u003cp\u003eOEM Quicksilver 14586A3 120°f thermostat kit is intended for the Mercury\/Mariner 6–25hp applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected 6–25hp two-stroke outboards. The application chart includes 6\/8\/9.9hp from 1986, selected 15hp from 1988 and selected 20\/25hp from 1986; exact year and serial boundaries vary by model and manufacturing country.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eIncludes the 120°F thermostat and gaskets. Confirm the engine-specific serial range before ordering.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 14586A3\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50288920822043,"sku":"710-14586A3","price":49.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/MTc1OTkwNTg-70933cc5.jpg?v=1789759667"},{"product_id":"710-25-8m0204651","title":"OEM Quicksilver 8M0204651 Thermostat Housing O-Ring for MerCruiser GM V6\/V8","description":"\u003cp\u003eOEM Quicksilver 8M0204651 thermostat housing o-ring for the MerCruiser GM V6\/V8 applications described below.\u003c\/p\u003e\u003ch2\u003eApplication and fitment\u003c\/h2\u003e\u003cp\u003eMerCruiser GM-based V6\/V8 thermostat-housing applications calling for exact part 8M0204651. Verify the housing diagram and seal dimensions.\u003c\/p\u003e\u003ch2\u003eSpecifications and part details\u003c\/h2\u003e\u003cp\u003eManufacturer O-ring chart lists 1.875-inch inside diameter and 0.135-inch width, with OMC references 310327 and 910582. Those references include separate OMC drive applications and are not a universal thermostat-fitment statement.\u003c\/p\u003e\u003ch2\u003ePurchase options\u003c\/h2\u003e\u003cp\u003eAvailable listing options: Single, Pack of 5. Availability is shown for each selected option.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M0204651\u003c\/p\u003e\u003cp\u003eConfirm the exact engine or drive serial number and applicable parts diagram before ordering.\u003c\/p\u003e\u003ch2\u003eVerified replacement details\u003c\/h2\u003e\u003cp\u003eRubber O-ring for the specified GM-based MerCruiser V6\/V8 thermostat housings with a flat cover plate. Previous manufacturer part number: 30224.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Single","offer_id":50288933306651,"sku":"710-25-8M0204651","price":3.76,"currency_code":"USD","in_stock":false},{"title":"Pack of 5","offer_id":54078791057691,"sku":"M-5X-710-25-8M0204651","price":18.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M0204651_Main.jpg?v=1747961976"},{"product_id":"710-27-530451","title":"OEM Quicksilver 530451 Thermostat Housing Gasket for MerCruiser, OMC \u0026 Volvo Penta GM V6\/V8","description":"\u003cp\u003eOEM Quicksilver 530451 thermostat housing gasket for the MerCruiser, OMC \u0026amp; Volvo Penta GM V6\/V8 applications described below.\u003c\/p\u003e\u003ch2\u003eApplication and fitment\u003c\/h2\u003e\u003cp\u003eSpecified GM V6\/V8 MerCruiser sterndrive and inboard thermostat-housing applications, plus matching OMC\/Volvo Penta configurations. Verify the original housing and gasket shape.\u003c\/p\u003e\u003ch2\u003eSpecifications and part details\u003c\/h2\u003e\u003cp\u003eManufacturer catalog formats this number as 53045 1. Cross-references: OMC 312797 and Volvo Penta 835417-7. Choose the single or multipack option by the required purchase quantity.\u003c\/p\u003e\u003ch2\u003ePurchase options\u003c\/h2\u003e\u003cp\u003eAvailable listing options: Single, Pack of 5. Availability is shown for each selected option.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 530451\u003c\/p\u003e\u003cp\u003eConfirm the exact engine or drive serial number and applicable parts diagram before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Single","offer_id":50288944677147,"sku":"710-27-530451","price":6.1,"currency_code":"USD","in_stock":false},{"title":"Pack of 5","offer_id":54078796562715,"sku":"M-5X-710-27-530451","price":30.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/530451_04.jpg?v=1747962183"},{"product_id":"710-27-8m0204714","title":"OEM Quicksilver 8M0204714 Thermostat Gasket for Mercury \u0026 Compatible Two-Stroke Outboards","description":"\u003cp\u003eOEM Quicksilver 8M0204714 thermostat gasket for the Mercury \u0026amp; Compatible Two-Stroke Outboards applications described below.\u003c\/p\u003e\u003ch2\u003eApplication and fitment\u003c\/h2\u003e\u003cp\u003eSpecified two-stroke outboard thermostat applications requiring exact gasket 8M0204714. Match engine serial number and thermostat-cover diagram; the catalog does not provide a universal horsepower range.\u003c\/p\u003e\u003ch2\u003eSpecifications and part details\u003c\/h2\u003e\u003cp\u003eManufacturer cross-reference: OMC 310058. Select the pack option for purchase quantity; the gasket is not a thermostat assembly.\u003c\/p\u003e\u003ch2\u003ePurchase options\u003c\/h2\u003e\u003cp\u003eAvailable listing options: Single, Pack of 4. Availability is shown for each selected option.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M0204714\u003c\/p\u003e\u003cp\u003eConfirm the exact engine or drive serial number and applicable parts diagram before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Single","offer_id":50288949264667,"sku":"710-27-8M0204714","price":2.59,"currency_code":"USD","in_stock":false},{"title":"Pack of 4","offer_id":54078796923163,"sku":"M-4X-710-27-8M0204714","price":10.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/quicksilver-8m0204714-9883665465627-catalog.jpg?v=1791343761"},{"product_id":"710-27-8m2021920","title":"OEM Quicksilver 8M2021920 Thermostat Housing Gasket for MerCruiser, OMC \u0026 Volvo Penta","description":"\u003cp\u003eOEM Quicksilver 8M2021920 thermostat housing gasket for the MerCruiser, OMC \u0026amp; Volvo Penta applications described below.\u003c\/p\u003e\u003ch2\u003eApplication and fitment\u003c\/h2\u003e\u003cp\u003eThe manufacturer lists 110\/120 and inline-six 140\/150\/160 applications using the specified aluminum-exhaust-manifold arrangement, plus MerCruiser 3.0L\/LX with closed cooling. Match the housing diagram.\u003c\/p\u003e\u003ch2\u003eSpecifications and part details\u003c\/h2\u003e\u003cp\u003eThermostat-housing gasket. Manufacturer cross-references include OMC 312797 and Volvo Penta 835417-7; match the exact housing rather than relying on a broad cross-reference alone.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M2021920\u003c\/p\u003e\u003cp\u003eConfirm the exact engine or drive serial number and applicable parts diagram before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50288950378779,"sku":"710-27-8M2021920","price":3.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/quicksilver-8m2021920-9883666055451-catalog.jpg?v=1791343700"},{"product_id":"710-8m0057307","title":"OEM Quicksilver 8M0057307 130°F Thermostat for Mercury OptiMax 3.0L V6","description":"\u003cp\u003eOEM Quicksilver 8M0057307 130°f thermostat is intended for the Mercury OptiMax 3.0L V6 applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eMercury 3.0L V6 OptiMax non-Pro models listed in the maintenance chart, serial 1B227000 and above. Verify the exact engine parts diagram.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e130°F replacement thermostat; the catalog lists 54°C. Do not extend this application to Pro models.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M0057307\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289194565915,"sku":"710-8M0057307","price":115.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8m0057307_main-1.jpg?v=1747967311"},{"product_id":"710-8m0076464","title":"OEM Quicksilver 8M0076464 160°F Thermostat for MerCruiser 8.1L","description":"\u003cp\u003eOEM Quicksilver 8M0076464 160°f thermostat is intended for the MerCruiser 8.1L applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected MerCruiser 8.1L sterndrive and inboard applications, including the 496 family when confirmed against the exact engine diagram.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e160°F thermostat; verify engine serial number and housing arrangement.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M0076464\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289197744411,"sku":"710-8M0076464","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8m0076464_main.jpg?v=1747967467"},{"product_id":"710-8m0089715","title":"OEM Quicksilver 8M0089715 140°F Thermostat for MerCruiser 4.5L\/6.2L MPI","description":"\u003cp\u003eOEM Quicksilver 8M0089715 140°f thermostat is intended for the MerCruiser 4.5L\/6.2L MPI applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected MerCruiser 4.5L MPI Alpha\/Bravo and Mercury-built 6.2L MPI Bravo applications requiring this thermostat. Confirm standard-cooling configuration and exact parts diagram.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e140°F thermostat. The same engine displacement can use a different thermostat with a different cooling system.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M0089715\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289202561307,"sku":"710-8M0089715","price":24.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8m0089715_main.jpg?v=1747967634"},{"product_id":"710-8m0090819","title":"OEM Quicksilver 8M0090819 120°F Thermostat and Housing Assembly for Mercury 75–115hp 2.1L FourStroke","description":"\u003cp\u003eOEM Quicksilver 8M0090819 120°f thermostat and housing assembly is intended for the Mercury 75–115hp 2.1L FourStroke applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eMercury 75–115hp 2.1L EFI FourStroke outboards; the maintenance chart includes the 2B094996-and-above application. Confirm exact engine model and serial number.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eIncludes thermostat and housing; 120°F rating confirmed by the current manufacturer product page.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M0090819\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289202921755,"sku":"710-8M0090819","price":82.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8m0090819_main.jpg?v=1747967672"},{"product_id":"710-8m0162139","title":"OEM Quicksilver 8M0162139 140°F Thermostat Assembly for Mercury V6\/V8 FourStroke","description":"\u003cp\u003eOEM Quicksilver 8M0162139 140°f thermostat assembly is intended for the Mercury V6\/V8 FourStroke applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected 150R\/200R 3.4L V6 at serial 3B547096 and above; 175–300hp 3.4L V6\/4.6L V8 at 2B529482 and above; 250R\/300R 4.6L V8 at 1E080500 and above; and 450R 4.6L V8 at 1E083006–1E099720.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e140°F thermostat assembly. Match the model-specific serial boundary; the 450R range is not the same as the standard V6\/V8 range.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M0162139\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289222222107,"sku":"710-8M0162139","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M0162139_Main.jpg?v=1747968009"},{"product_id":"710-8m0174561","title":"OEM Quicksilver 8M0174561 140°F Thermostat Housing Assembly for Mercury Verado L4\/L6","description":"\u003cp\u003eOEM Quicksilver 8M0174561 140°f thermostat housing assembly is intended for the Mercury Verado L4\/L6 applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected Mercury 135–175hp L4, 200–400hp L6 and 400R L6 FourStroke outboards. This application is for the specified L4\/L6 engines, not the later V10 family. Confirm serial number.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e140°F thermostat housing assembly. Additional seals, gaskets, clamps and attaching hardware are sold separately.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M0174561\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289224941851,"sku":"710-8M0174561","price":177.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M0174561_Main-1.jpg?v=1747968135"},{"product_id":"710-8m6010294","title":"OEM Quicksilver 8M6010294 Replacement Thermostat for Yamaha 25–200hp Two-Stroke","description":"\u003cp\u003eOEM Quicksilver 8M6010294 replacement thermostat is intended for the Yamaha 25–200hp Two-Stroke applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected Yamaha 25–200hp three-cylinder, V4 and V6 two-stroke outboards.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eHardware, gaskets and seals sold separately. Manufacturer cross-references: 688-12411-00-00, 688-12411-01-00, 688-12411-10-00, 688-12411-11-00, 6E5-12411-10-00, 6E5-12411-20-00 and 6E5-12411-30-00; Sierra 18-3540.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6010294\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289239884059,"sku":"710-8M6010294","price":24.57,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6010294_Main.jpg?v=1747969115"},{"product_id":"710-8m6010295","title":"OEM Quicksilver 8M6010295 Replacement Thermostat for Yamaha Two-Stroke \u0026 F115","description":"\u003cp\u003eOEM Quicksilver 8M6010295 replacement thermostat is intended for the Yamaha Two-Stroke \u0026amp; F115 applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected Yamaha 115–300hp two-stroke outboards and F115 FourStroke applications.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eHardware, gaskets and seals sold separately. Manufacturer cross-references: Yamaha 60V-12411-00-00 and 68V-12411-00-00; Sierra 18-3525.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6010295\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289239916827,"sku":"710-8M6010295","price":34.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6010295_Main.jpg?v=1747969127"},{"product_id":"710-8m6010296","title":"OEM Quicksilver 8M6010296 Replacement Thermostat for Yamaha 80–250hp FourStroke","description":"\u003cp\u003eOEM Quicksilver 8M6010296 replacement thermostat is intended for the Yamaha 80–250hp FourStroke applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected Yamaha 80–250hp four-stroke outboards; match the specific engine and thermostat part number.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eHardware, gaskets and seals sold separately. Manufacturer cross-references: Yamaha 67F-12411-00-00 and 67F-12411-01-00; Sierra 18-3632.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6010296\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289240113435,"sku":"710-8M6010296","price":29.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6010296_Main.jpg?v=1747969139"},{"product_id":"710-8m6010297","title":"OEM Quicksilver 8M6010297 Replacement Thermostat for Yamaha VF250 4.2L","description":"\u003cp\u003eOEM Quicksilver 8M6010297 replacement thermostat is intended for the Yamaha VF250 4.2L applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eYamaha VF250 250hp 4.2L four-stroke applications specified for this part. Do not assume all F250 models use the same thermostat.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eHardware, gaskets and seals sold separately. Manufacturer cross-reference: Yamaha 6CB-12411-10-00; Sierra 18-3637.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6010297\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289240146203,"sku":"710-8M6010297","price":41.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6010297_Main.jpg?v=1747969144"},{"product_id":"710-8m6010299","title":"OEM Quicksilver 8M6010299 Replacement Thermostat for Yamaha F\/VF150–200","description":"\u003cp\u003eOEM Quicksilver 8M6010299 replacement thermostat is intended for the Yamaha F\/VF150–200 applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected Yamaha F\/VF150 through F\/VF200 four-stroke outboards.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eHardware, gaskets and seals sold separately. Manufacturer cross-references: Yamaha 6DA-12411-00-00 and 6DA-12411-01-00; Sierra 18-3636.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6010299\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289240211739,"sku":"710-8M6010299","price":45.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6010299_Main.jpg?v=1747969155"},{"product_id":"710-8m6010300","title":"OEM Quicksilver 8M6010300 Replacement Thermostat for Yamaha F\/VF75–90","description":"\u003cp\u003eOEM Quicksilver 8M6010300 replacement thermostat is intended for the Yamaha F\/VF75–90 applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected Yamaha F\/VF75 through F\/VF90 four-stroke outboards.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eHardware, gaskets and seals sold separately. Manufacturer cross-reference: Yamaha 6FP-12411-00; Sierra 18-3641.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6010300\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289240473883,"sku":"710-8M6010300","price":47.04,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6010300_Main.jpg?v=1747969166"},{"product_id":"710-8m6010302","title":"OEM Quicksilver 8M6010302 143°F Thermostat for Evinrude\/Johnson\/OMC","description":"\u003cp\u003eOEM Quicksilver 8M6010302 143°f thermostat is intended for the Evinrude\/Johnson\/OMC applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected 6–55hp two-stroke outboards and specified V4\/V6 Crossflow applications.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e143°F thermostat. Hardware, gaskets and installation seals are sold separately. Manufacturer-listed cross-reference: Sierra 18-3553.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6010302\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289240670491,"sku":"710-8M6010302","price":19.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6010302_Main.jpg?v=1747969186"},{"product_id":"710-8m6010303","title":"OEM Quicksilver 8M6010303 130°F Thermostat for Evinrude\/Johnson\/OMC 90–250hp","description":"\u003cp\u003eOEM Quicksilver 8M6010303 130°f thermostat is intended for the Evinrude\/Johnson\/OMC 90–250hp applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected 90–250hp V4\/V6 two-stroke outboards.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e130°F thermostat. Hardware, gaskets and seals sold separately. Manufacturer cross-reference: Johnson 437090; Sierra 18-3545.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6010303\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289240703259,"sku":"710-8M6010303","price":21.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6010303_Main.jpg?v=1747969205"},{"product_id":"710-8m6010304","title":"OEM Quicksilver 8M6010304 143°F Vernatherm-Style Thermostat for Evinrude\/Johnson\/OMC 60–70hp","description":"\u003cp\u003eOEM Quicksilver 8M6010304 143°f vernatherm-style thermostat is intended for the Evinrude\/Johnson\/OMC 60–70hp applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected 60–70hp two-stroke outboards.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eSingle-piece Vernatherm-style 143°F thermostat. Installation hardware, gaskets and seals sold separately. Manufacturer cross-reference: Johnson 436195; Sierra 18-3561.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6010304\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289240736027,"sku":"710-8M6010304","price":16.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6010304_Main.jpg?v=1747969216"},{"product_id":"710-8m6010305","title":"OEM Quicksilver 8M6010305 143°F Thermostat for Evinrude\/Johnson\/OMC 90–170hp","description":"\u003cp\u003eOEM Quicksilver 8M6010305 143°f thermostat is intended for the Evinrude\/Johnson\/OMC 90–170hp applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected 90–170hp V4\/V6 two-stroke outboards.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e143°F thermostat. Hardware, gaskets and seals sold separately. Manufacturer-listed cross-reference: Johnson 435491; Sierra 18-3544. Verify required temperature before substituting a cross-reference.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6010305\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289240932635,"sku":"710-8M6010305","price":26.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6010305_Main.jpg?v=1747969222"},{"product_id":"710-8m6013865","title":"OEM Quicksilver 8M6013865 Replacement Thermostat for Yamaha FourStroke","description":"\u003cp\u003eOEM Quicksilver 8M6013865 replacement thermostat is intended for the Yamaha FourStroke applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eYamaha F75, F90, F80 (2001 onward), F100 (2001 onward), VF200, VF225 and VF250 applications specified for this part.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eQuicksilver replacement thermostat; verify exact engine model and serial-specific parts diagram.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6013865\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e\u003ch2\u003eVerified replacement details\u003c\/h2\u003e\u003cp\u003eManufacturer cross-references: Yamaha 67F-12411-00-00, 67F-12411-01-00 and 6CB-12411-00-00; Sierra 18-3632. Hardware, gaskets and installation seals are sold separately.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289241686299,"sku":"710-8M6013865","price":30.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6013865_Main.jpg?v=1747969269"},{"product_id":"710-8m6013867","title":"OEM Quicksilver 8M6013867 Replacement Thermostat for Yamaha 4.2L F225\/F250\/F300","description":"\u003cp\u003eOEM Quicksilver 8M6013867 replacement thermostat is intended for the Yamaha F225\/F250\/F300 applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eYamaha F225, F250 and F300 applications calling for thermostat 8M6013867. Match the complete model designation and engine parts diagram.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eQuicksilver replacement thermostat. Engine model names span different generations; match the original thermostat number before ordering.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 8M6013867\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e\u003ch2\u003eVerified replacement details\u003c\/h2\u003e\u003cp\u003eFor Yamaha 4.2L F225, F250 and F300. Manufacturer cross-reference: Yamaha 6CE-12411-00-00; Sierra 18-3524. Thermostat only; installation hardware, gaskets and seals are sold separately.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289241719067,"sku":"710-8M6013867","price":33.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/8M6013867_Main.jpg?v=1747969275"},{"product_id":"710-803061t-1","title":"OEM Quicksilver 803061T1 120°F Thermostat Kit for Mercury\/Mariner 70–125hp","description":"\u003cp\u003eOEM Quicksilver 803061T1 120°f thermostat kit is intended for the Mercury\/Mariner 70–125hp applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected 70–125hp three- and four-cylinder two-stroke outboards from 1987 onward. Model introduction and serial ranges vary; this is not a FourStroke thermostat kit.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003eIncludes thermostat, thermostat gasket, washer and cover gasket. Use the specified 120°F rating.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 803061T1\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289242571035,"sku":"710-803061T1","price":30.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/quicksilver-803061t1-9883758690587-catalog.jpg?v=1791344170"},{"product_id":"710-825212a-1","title":"OEM Quicksilver 825212A1 120°F Thermostat Kit for Mercury\/Mariner FourStroke","description":"\u003cp\u003eOEM Quicksilver 825212A1 120°f thermostat kit is intended for the Mercury\/Mariner FourStroke applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected Mercury\/Mariner FourStroke engines, including 30hp (1999–2005), 40hp three-cylinder and 50hp (1995–2000). For 30hp: USA 0G760300–1B226999 or Belgium 0P017000–0P400999. For 40hp three-cylinder: USA 0G231123 and above or Belgium 0P017000 and above. For 50hp: USA 0G231123–0T178499. The chart also lists selected 8\/9.9\/15\/25\/45hp engines with separate serial boundaries.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e120°F thermostat and gaskets. Select by exact engine model and serial number, not horsepower alone.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 825212A1\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289255448859,"sku":"710-825212A1","price":73.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/quicksilver-825212a1-9883764654363-catalog.jpg?v=1791344170"},{"product_id":"710-833072003","title":"OEM Quicksilver 833072003 143°F Thermostat for Mercury OptiMax","description":"\u003cp\u003eOEM Quicksilver 833072003 143°f thermostat is intended for the Mercury OptiMax applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected Mercury OptiMax applications requiring exact part 833072003. Confirm by the engine serial number and parts diagram; horsepower-only compatibility is not stated here because manufacturer references differ.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e143°F thermostat. Use the specified temperature rating. The similar 833072004 number should not be substituted without an exact parts lookup.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 833072003\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289255547163,"sku":"710-833072003","price":44.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/710-833072003.jpg?v=1748659872"},{"product_id":"710-833072004","title":"OEM Quicksilver 833072004 143°F Thermostat for Mercury OptiMax 1.5L","description":"\u003cp\u003eOEM Quicksilver 833072004 143°f thermostat is intended for the Mercury OptiMax 1.5L applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eThe manufacturer maintenance chart lists this thermostat for 75\/90\/115hp 1.5L OptiMax outboards, serial 1B227000 and above. Confirm the exact parts diagram before ordering.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e143°F thermostat (catalog lists 62°C). Do not infer interchangeability from the similar 833072003 part number.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 833072004\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289255743771,"sku":"710-833072004","price":33.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/710-833072004.jpg?v=1748659874"},{"product_id":"710-864493","title":"OEM Quicksilver 864493 170°F Thermostat for MerCruiser Closed-Cooling Engines","description":"\u003cp\u003eOEM Quicksilver 864493 170°f thermostat is intended for the MerCruiser Closed-Cooling Engines applications below.\u003c\/p\u003e\u003ch2\u003eEngine application\u003c\/h2\u003e\u003cp\u003eSelected MerCruiser 4.3L, 4.5L, 5.0L\/5.7L MPI and 6.2L MPI applications with the specified closed-cooling configuration. Match the exact engine serial number and cooling-system diagram.\u003c\/p\u003e\u003ch2\u003eSpecifications and included items\u003c\/h2\u003e\u003cp\u003e170°F thermostat for the listed closed-cooling applications. Do not substitute for the lower-temperature thermostat used by a different cooling arrangement.\u003c\/p\u003e\u003ch2\u003ePart identification\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eManufacturer part number:\u003c\/strong\u003e 864493\u003c\/p\u003e\u003cp\u003eUse the thermostat and temperature rating specified for the exact engine. Check the model, serial number and cooling-system configuration before ordering.\u003c\/p\u003e","brand":"MERCURY\/QUICKSILVER","offers":[{"title":"Default Title","offer_id":50289284645147,"sku":"710-864493","price":29.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/8652\/0347\/files\/710-864493.jpg?v=1748660275"}],"url":"https:\/\/partsduck.com\/collections\/mercury-quicksilver-thermostats.oembed","provider":"PartsDuck.com","version":"1.0","type":"link"}