Description
Quicksilver 8M6012799 Yamaha 4.2L F225 F250 F300 Thermostat With O-Ring
The Quicksilver 8M6012799 replacement thermostat helps regulate cooling-system temperature on compatible Yamaha outboards. Select the part by engine model and serial number rather than horsepower alone.
Key Features
- Quicksilver replacement part 8M6012799.
- For the Yamaha applications listed below.
- Includes a thermostat and O-ring.
Fitment & Applications
Yamaha 4.2L F225, F250 and F300 4-stroke outboards. Confirm fitment using the engine parts diagram and service manual before purchasing.
Product Details
- Brand: Quicksilver
- Manufacturer part number: 8M6012799
- Application: Yamaha outboard cooling system
- Condition: New
- UPC: 678633189616
What's Included
One thermostat and one O-ring.
Service Notes
Use the engine manufacturer's installation procedure and torque specifications. Inspect the thermostat cover and sealing surfaces during service. Order any additional required installation parts separately.
Why You Should Buy
A replacement option for servicing the thermostat on the specified Yamaha engines. Check the existing part number and application before ordering.
Common Applications
Cooling-system maintenance and replacement of a faulty thermostat on compatible Yamaha outboards.
FAQs
Does it fit every Yamaha engine in the horsepower range?
No. Compatibility depends on the exact engine model, year and serial number.
What is supplied?
One thermostat and one O-ring.





