Thermostat Kit 807252T4 is a 140 F degree thermostat for MerCruiser sterndrive and inboard V6 and V8 engines with standard cooling systems made by General Motors (1983 through 2016), except high performance engines.Mercury Marine’s passion for performance is matched by your drive for the new, the unknown. Our legendary reliability and durability let you boldly embrace your next adventure—large or small—knowing you’re backed by the best quality design, engineering, and materials.Key Features 140°F thermostat for MerCruiser sterndrive or inboard V6 and V8 engines with standard cooling systems made by General Motors Six piece kit includes thermostat, o-rings and gaskets Easy to replace with common tools See your owner's or service manual for removal of non-functioning thermostat and replacement of new thermostat Fitment / ApplicationFits 1983 -2016 GM V-6 and V-8 engines with standard cooling requiring a 140-degree thermostat (except high performance engines).