Yamaha - Thermostat Cover - Cooling System Housing - 6EK-12413-00-00

Overview

Thermostat covers are one of those parts you usually only deal with when you’re already into the cooling system. But if it’s cracked, corroded, or not sealing right, it can cause more problems than you’d expect. I’ve seen small leaks or poor sealing turn into overheating issues pretty quickly. When this piece is solid and sealed up properly, the cooling system just does its job without any drama.

Key Features

• Secure Thermostat Housing – Encloses and protects the thermostat within the cooling system.
• Leak-Resistant Sealing Surface – Designed to work with gaskets for tight, reliable sealing.
• Durable Marine Construction – Built to withstand heat cycles and constant water exposure.
• Corrosion-Resistant Design – Helps hold up against harsh saltwater environments.
• Direct Fit Replacement – Matches Yamaha specifications for proper alignment and installation.

Engine & Boat Compatibility

Designed for Yamaha outboard engines utilizing a thermostat-controlled cooling system. Commonly used across mid-range Yamaha outboards in both recreational and commercial boats. Suitable for freshwater and saltwater applications where proper engine temperature regulation is essential.

FAQ

Q: What are signs this thermostat cover needs replacing?
A: Visible corrosion, cracks, or water leaks around the housing are the most common signs.

Q: Do I need a new gasket when installing this cover?
A: Yes, it’s always recommended to use a new gasket to ensure a proper seal.

Q: Any tips for installation?
A: Clean the mating surfaces thoroughly and tighten bolts evenly to avoid warping or leaks.

Q: How does saltwater affect this part?
A: Salt can cause corrosion over time, so regular rinsing and inspection help extend its life.

Q: Can a bad cover lead to overheating?
A: Yes, if it leaks or doesn’t seal properly, it can disrupt cooling flow and cause temperature issues.