Quicksilver 807252Q3 Replacement Thermostat Kit 140°F MerCruiser V8

The Quicksilver 807252Q3 is an OEM-quality replacement thermostat kit designed for vintage V8 MerCruiser marinized sterndrive and inboard engines with standard raw-water cooling systems. Operating at a 140°F opening temperature, this kit delivers precise engine temperature regulation to protect your powerplant and maintain optimal performance on the water.

Manufactured by Mercury Marine to original equipment specifications, this kit is a direct-fit solution for V8 MerCruiser applications — eliminating the guesswork and reliability risks associated with aftermarket alternatives.

Kit Contents & Key Features:

• 5-piece kit includes the thermostat, flat gasket, and rubber gasket — everything needed for a complete replacement
• 140°F thermostat for precise engine temperature control in standard raw-water cooling systems
• Built to Mercury Marine OEM specifications for guaranteed fit and function
• Installs easily with common hand tools
• Backed by Mercury Marine's 1-year factory warranty against defects in materials and workmanship

Compatible with 1982 and older V8 MerCruiser marinized sterndrive and inboard engines (Ford Motor Company or General Motors) with standard cooling systems, as well as 1996 and older high-performance MerCruiser engines built by Ford or General Motors. Refer to your owner's manual for thermostat removal and installation procedures.