6G8-12411-00-00 66M-12411-01-00 Thermostat for Yamaha 4 Stroke Outboard Motor

Thermostat for Yamaha 4 Stroke Outboard Motor

This thermostat for Yamaha 4 stroke outboard motors regulates engine temperature and cross-references OEM part numbers 6G8-12411-00-00 and 66M-12411-01-00.

Overview

This thermostat is a direct replacement for Yamaha 4 stroke outboard motors, ensuring the engine reaches and maintains optimal operating temperature. Designed to control coolant flow, it prevents overheating and cold-running inefficiencies. Ideal for boat owners and marine mechanics servicing Yamaha 4 stroke outboard motors.

Built For Performance

• Precision-engineered to open and close at the correct temperature
• Constructed from corrosion-resistant materials for marine environments
• Meets OEM specifications for form, fit, and function
• Ensures consistent engine operating temperature
• Reduces risk of overheating and engine damage

On-The-Job Use

• Installed in the cooling system of Yamaha 4 stroke outboard motors
• Used during routine maintenance to replace worn thermostats
• Helps maintain engine temperature during long trips at sea
• Commonly used by marine mechanics and DIY boat owners
• Essential for proper engine warm-up and consistent performance

Specs At A Glance

Good To Know

Q: How do I know if my thermostat needs replacement? A: If your engine overheats or runs too cool, the thermostat may be stuck open or closed. Replacing it with a compatible unit restores proper temperature control.

Q: Does this thermostat work with all Yamaha 4 stroke outboard motors? A: It is designed for Yamaha 4 stroke outboard motors, but compatibility can vary by model and serial number. Always verify fitment before ordering.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.