Thermostat 170°F / 77°C – Fits MerCruiser 4.3L, 5.0L, 5.7L & 6.2L Engines (Replaces Mercury 864493) 2-6 4-Stroke as it depends on usage

as it depends on usage (freshwater vs

Running an engine without a thermostat is not recommended

replacing the gasket is critical to prevent leaks

63 inch) Overall Diameter 67

a glazed or shiny appearance in the pulley grooves

Thermostat 170°F / 77°C – Fits MerCruiser 4.3L, 5.0L, 5.7L & 6.2L Engines (Replaces Mercury 864493) 2-6 4-Stroke as it depends on usageProduct Details This is a direct replacement Thermostat 170F 77C Fits MerCruiser 4. 3L, 5. 0L, 5. 7L & 6. 2L Engines (Replaces 864493). It is designed for a wide range of MerCruiser V6 and V8 MPI sterndrive engines manufactured from 2000 to 2025, ensuring proper engine operating temperature for optimal performance and fuel efficiency. It serves as a direct interchange for multiple part numbers, including Mercury 864493, Sierra 18 43015, Mallory 9