Yamaha - Thermostat Seal - Cooling System Sealing Component - 6FM-12412-00-00

Overview

The Yamaha Thermostat Seal | 6FM-12412-00-00 is one of those small parts that can cause big problems if it’s not doing its job. When this seal starts to wear out or flatten, you can end up with leaks or inconsistent engine temperatures. It keeps the thermostat housing sealed so coolant flows where it’s supposed to. If you’re servicing the cooling system, this is one of those parts you replace without thinking twice.

Key Features

• Secure Cooling System Seal – Keeps the thermostat housing sealed to prevent leaks and maintain proper flow.

• OEM Fit Precision – Designed to match Yamaha specifications for proper seating and sealing.

• Temperature Control Support – Helps ensure consistent engine temperature by maintaining system integrity.

• Heat-Resistant Material – Built to handle high temperatures and continuous cooling cycles.

Compatibility

Compatible with select Yamaha outboard engines using this thermostat seal configuration.
Commonly found in Yamaha cooling systems requiring proper thermostat housing sealing.
Always confirm compatibility using your engine model and part number.

FAQs

Q1: What are signs this thermostat seal is failing?
A: Coolant leaks, fluctuating engine temperature, or visible wear on the seal are common signs.

Q2: Can a bad seal cause overheating?
A: Yes, leaks or improper sealing can affect coolant flow and lead to overheating issues.

Q3: Should I replace this when changing the thermostat?
A: Absolutely, it’s standard practice to replace the seal anytime the housing is opened.

Q4: Is installation difficult?
A: Not at all, just make sure surfaces are clean and the seal is properly seated.

Q5: Does saltwater use affect this part?
A: Over time, exposure to heat and minerals can wear it down, so regular inspection helps.