Yamaha - Thermostat Cover - Cooling System Component - 6C5-12413-00-9S

Overview

This is one of those parts that keeps the cooling system sealed and doing its job without you thinking about it. The thermostat cover holds everything in place so coolant flows the way it should through the engine. If it’s cracked, warped, or not sealing right, you’ll end up with leaks or temperature issues pretty quick. It’s a simple piece, but it plays a big role in keeping the motor running at the right temperature.

Key Features

• Secure Thermostat Housing – Keeps the thermostat properly enclosed for consistent operation.

• Maintains System Pressure – Helps ensure proper coolant flow and temperature regulation.

• OEM Fit Accuracy – Matches Yamaha factory specs for proper sealing and alignment.

• Heat Resistant Construction – Built to handle temperature changes and marine conditions.

Engine & Boat Compatibility

Verify compatibility with your specific Yamaha outboard model and part number before installation.

FAQs

Q1: What are signs this cover needs replacing?
A: Coolant leaks, cracks, or inconsistent engine temperature.

Q2: Can a bad cover cause overheating?
A: Yes, poor sealing can reduce cooling efficiency.

Q3: Should I replace the gasket when installing this?
A: Yes, a new gasket is recommended to ensure a proper seal.

Q4: Does saltwater use affect this part?
A: Over time, corrosion and heat cycles can wear it down.

Q5: Is installation difficult?
A: It’s straightforward, but proper sealing and bolt torque are important.

• Supersessions
  6C5-12413-00-1S