Mercury Thermostat, 140°F (Various MerCruiser Sterndrives) 8M0089715

Mercury 140°F Thermostat 8M0089715 is sold under the Quicksilver brand, Mercury Marine's line of replacement parts and accessories. This OEM replacement thermostat is designed for select MerCruiser sterndrive and inboard gasoline engines requiring a 140°F thermostat.

Compatible with select MerCruiser applications including:

• 4.3L V6
• 5.0L V8
• 5.7L V8
• 6.2L V8
• 7.4L V8
• 8.2L V8
• Select carbureted and EFI/MPI engine configurations

The thermostat regulates coolant flow according to engine temperature, helping the engine reach and maintain its designed operating temperature. A worn, corroded, or sticking thermostat can contribute to improper engine temperatures and cooling-system performance issues.

This thermostat has a 140°F opening temperature. Because MerCruiser engines within the same displacement family can use different thermostats depending on the cooling system and engine configuration, compatibility should be confirmed by serial number before ordering.

Supersedes/Replaces: 807252Q4, 807252T4, 807252T5

To Confirm Compatibility: Contact our team with your engine serial number at (727) 596-5929 before ordering.

Replaces / supersedes Mercury part numbers: 32728, 35884, 59137, 59137A1, 67464, 8052731, 8072521, 807252B1, 807252T1.