Yamaha - Cover, Thermostat - Cooling System Component - 682-12413-00-1S

Overview

When you’re working on the cooling side of a Yamaha, the thermostat housing and cover are just as important as the thermostat itself. I’ve seen small leaks and cooling issues come from covers that are warped or not sealing right. This piece keeps everything sealed up so the cooling system can do its job without losing pressure. It’s simple, but it plays a big role in keeping temperatures where they should be.

Key Features

• Secure Thermostat Housing – Keeps the thermostat properly enclosed for consistent cooling system operation.
• Genuine Yamaha Fitment – Designed to match factory mounting points and sealing surfaces.
• Leak Prevention Support – Helps maintain a tight seal to prevent coolant or water leaks.
• Cooling System Stability – Supports proper pressure and flow within the cooling system.
• Durable Marine Construction – Built to handle heat cycles and exposure to water over time.

Engine & Boat Compatibility

Compatible with select Yamaha outboards using this thermostat cover. Verify fitment based on your specific engine model.

FAQ

Q: What happens if the thermostat cover is damaged?
A: You can get leaks or improper sealing, which can affect cooling performance.

Q: Do I need to replace this when changing the thermostat?
A: Not always, but if it’s warped or corroded, it’s a good idea to replace it.

Q: Can a bad cover cause overheating?
A: It can contribute if it causes leaks or prevents proper pressure in the system.

Q: Is installation difficult?
A: No, it’s usually a straightforward replacement with basic tools.

Q: Does saltwater affect this part?
A: Yes, over time corrosion can build up if it’s not properly maintained.

• Supersessions
  682-12413-00-94, 682-12413-00-9M