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It’s simple: a mechanical car thermostat opens when your engine gets too hot, letting coolant flow, and then it closes when the temperature is just right. Summit...
It’s simple: a mechanical car thermostat opens when your engine gets too hot, letting coolant flow, and then it closes when the temperature is just right. Summit Racing Equipment is your ultimate source for mechanical thermostats, with applications for every engine size and opening temperature you would ever need!
It’s simple: a mechanical car thermostat opens when your engine gets too hot, letting coolant flow, and then it closes when the temperature is just right. Summit Racing Equipment is your ultimate source for mechanical thermostats, with applications for every engine size and opening temperature you would ever need!
Showing In Stock Items. Show All 121 Items.
Thermostat Kit for 1982 & older MerCruiser V8 engines with standard cooling systems and 1996 and older high performance MerCruiser engines
Part Number: QSV-807252Q3
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Thermostat for V-6 Mercury/Mariner outboards, 135/150 hp with s/n A904646 & above, 175 hp s/n C100861 & above, and 200 hp with s/n 6435503 & above.
Part Number: QSV-75692Q2
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Quicksilver Thermostat Marine Replacement 59078Q3
Part Number: QSV-59078Q3
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Thermostat Kit, Gasket, O-ring, Copper/Stainless Steel, 142 Degree, 1983 and up GM V6 and V8 engines with standard cooling, Kit
Part Number: RRA-18-3668
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Thermostat Kit, Gasket, O-ring, Copper/Stainless Steel, 160 Degree, OMC 4.3, 5.0, 5.8, Kit
Part Number: RRA-18-3677
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Thermostat, Gaskets, Springs, Outboard, Johnson/Evinrude, Kit
Part Number: RRA-18-3673
Not Yet Reviewed
Estimated Ship Date: Feb 2, 2026 if ordered today
Estimated Ship Date: Feb 2, 2026 if ordered today
Thermostat, Gasket, Outboard, Copper/Brass, Mercury Marine, Kit
Part Number: RRA-18-3672
Not Yet Reviewed
Estimated Ship Date: Feb 4, 2026 if ordered today
Estimated Ship Date: Feb 4, 2026 if ordered today
Thermostat Kit-180 & 203 Degrees w/ Gasket and Seals
Part Number: SNN-427457
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Engine Coolant Water Outlet and Thermostat Housing Kit
Part Number: FSS-86013
Not Yet Reviewed
Estimated Ship Date: Jan 19, 2026 if ordered today
Estimated Ship Date: Jan 19, 2026 if ordered today
Thermostat Kit 143°F fits Mercury/Mariner V6 135hp, V6 150hp, V6 175hp, and V6 200hp. Replaces Evinrude and Johnson OMC #434841.
Part Number: QSV-75692Q03
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Thermostats, Mechanical, 160 Degrees F Opening Temperature, GLM/Mallory/Mercruiser Replacement, Each
Part Number: RRA-18-3555
Not Yet Reviewed
Estimated Ship Date: Feb 4, 2026 if ordered today
Estimated Ship Date: Feb 4, 2026 if ordered today
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