Thermostat Kits
Complete Your Purchase
Original equipment thermostats keep the engine running at optimum temperature.
Engines can lose power and efficiency if the thermostat is stuck open or closed resulting in running too cold or too hot. Fortunately, normal function can be restored by replacing the thermostat. Mercury offers a range of thermostat kits that include the necessary gaskets and O-rings to complete the installation.
Available in many temperature ratings for different engine applications, reference your repair manual or the table below to confirm the proper part number for your inboard or outboard engine.
Or call 1-800 BOATING with your serial number, or make, model and year of your engine and speak to an expert to find the right thermostat.
Key Features
- Engineered to original Mercury or MerCruiser specifications
- Quicksilver is an OEM part and will restore function to factory specifications
- Temperature ratings to factory specifications keep engine running at optimum temperature
- Kits include necessary gaskets and associated parts to complete installation (except p/n 59078Q3: thermostat only)
Application Guide
| Temperature Rating | MERC p/n | Application | Model Number |
|---|---|---|---|
| 140° | 807252Q3 | Up to 1982 Ford & GM V8/standard cooling. Up to 1996 high performance models | 4538690 |
| 140° | 807252Q4 | 1983 and up GM V6 & V8/standard 140° cooling (except high performance) | 5344866 |
| 140° | 59078Q3 | GM in-line 4 & 6 cyl. | 4538708 |
| 143° | 75692Q03 | V6 outboards | 1661974 |
| 160° | 807252Q5 | 1987 and up GM/standard 160° cooling | 4538716 |
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