Yamaha - Thermostat Cover - Cooling System Housing - 655-12413-01-1S

Overview

When you’re working on the cooling system, the thermostat cover is one of those parts that needs to seal up right every time. It holds the thermostat in place and keeps everything contained so the engine can regulate temperature properly. If it’s warped, cracked, or corroded, you’ll end up chasing leaks or inconsistent cooling. This Yamaha thermostat cover is built to fit clean and keep the system sealed the way it should be.

Key Features

• Secure Thermostat Housing – Holds the thermostat in place for proper operation.

• Leak-Resistant Design – Helps maintain a tight seal to prevent coolant or water leaks.

• OEM Yamaha Fitment – Built to factory specifications for accurate installation.

• Durable Construction – Designed to withstand heat and marine conditions.

Engine & Boat Compatibility

• Compatible with select Yamaha outboards that utilize this thermostat cover (confirm fitment by model and year)

FAQ

Q: What happens if the thermostat cover is damaged?
A: It can cause leaks and affect the engine’s ability to regulate temperature.

Q: Should I replace the gasket when installing this cover?
A: Yes, always use a new gasket to ensure a proper seal.

Q: Can corrosion affect this part?
A: Yes, especially in saltwater, corrosion can weaken the cover over time.

Q: Is installation straightforward?
A: Yes, but make sure surfaces are clean and bolts are torqued properly.

• Supersessions
  655-12413-01-94, 655-12413-01-9M