Yamaha - Thermostat Cover - Engine Cooling System Housing - 68T-12413-00-1S

Overview

This is one of those parts that keeps your cooling system sealed up and working the way it should. The thermostat cover might not look like much, but it plays a big role in maintaining proper engine temperature. If it’s warped, corroded, or not sealing right, you can end up chasing cooling issues that don’t seem obvious at first. It’s a simple component, but it needs to fit right and hold tight every time.

Key Features

• Secure Thermostat Housing – Encloses the thermostat to maintain proper coolant flow and temperature control.
• Corrosion-Resistant Construction – Built to handle exposure to saltwater and harsh marine environments.
• Precision Sealing Surface – Designed to create a tight seal and prevent leaks within the cooling system.
• OEM Fitment Design – Matches Yamaha specifications for proper alignment and reliable installation.

Engine & Boat Compatibility

Yamaha Outboard Models – Varies by application (confirm by part number)

FAQ

Q: What are the signs of a bad thermostat cover?
A: You might see coolant leaks, corrosion buildup, or trouble maintaining proper engine temperature.

Q: Can a damaged cover cause overheating?
A: Yes, if it doesn’t seal properly, it can disrupt coolant flow and lead to overheating issues.

Q: Should I replace the gasket when installing this cover?
A: Always. A new gasket helps ensure a proper seal and prevents leaks.

Q: How does saltwater affect this part?
A: Over time, salt can cause corrosion, especially if the engine isn’t flushed regularly.

Q: Is installation difficult?
A: It’s a straightforward job, just make sure surfaces are clean and bolts are tightened evenly.

• Supersessions
  68T-12413-00-9M