Sierra 18-3636 Marine Thermostat for Yamaha Outboard Engines

The Sierra 18-3636 is a premium marine thermostat designed as a direct OEM replacement for Yamaha 4-stroke outboard engines. This thermostat features a 60°C (140°F) operating temperature and is engineered to maintain optimal engine temperature for improved performance and fuel efficiency.

Key Features:

• Direct OEM replacement for Yamaha part numbers 6DA-12411-00-00 and 6DA-12411-01-00
• 60°C operating temperature rating for precise thermal regulation
• Corrosion-resistant construction designed for harsh marine environments
• Includes gasket seal for proper installation
• Helps prevent engine overheating and extends component life

This thermostat is a critical component of your outboard's cooling system, regulating coolant flow to ensure the engine reaches and maintains proper operating temperature. Consistent temperature control improves fuel efficiency, reduces emissions, and protects vital engine components from thermal damage. Sierra's quality construction ensures reliable performance and durability in saltwater and freshwater applications.