Mercury Thermostat Kit, 160°F (GM MerCruiser V6 & V8 Closed Cooling) 99155T1

Mercury Thermostat Kit, 160°F (GM MerCruiser V6 & V8 Closed Cooling) 99155T1 is a genuine Mercury/Quicksilver OEM replacement kit designed for compatible General Motors-based MerCruiser V6 and V8 engines with closed cooling systems. A properly functioning thermostat helps maintain the correct engine operating temperature for dependable performance, fuel efficiency, and long engine life.

Compatible with the following (1998 and newer w/ closed cooling):

• GM-based MerCruiser V6 engines
• GM-based MerCruiser V8 engines

This 160°F thermostat kit includes the replacement thermostat and seal needed for routine cooling system service. Replacing both components during installation helps ensure a proper seal and reliable cooling system operation.

Kit Includes:

• 160°F thermostat
• Seal

Always install the thermostat temperature specified in your owner's or service manual. Using the correct thermostat helps maintain proper cooling system operation and long-term engine reliability.

Quicksilver is Mercury Marine's official parts and accessories brand, offering the same OEM quality and fit as Mercury-branded components.

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