Sierra 18-3611 Marine Thermostat Kit for Yamaha Outboard Engines

The Sierra 18-3611 Marine Thermostat Kit is engineered specifically for Yamaha 4-stroke outboard engines, ensuring optimal engine temperature regulation and performance. This complete kit replaces Yamaha OEM part numbers 6H3-12414-A1-00 and 6G8-12411-03-00, providing a reliable and cost-effective alternative to factory parts.

Key Features:

• Temperature rating: 140°F (60°C) for proper engine cooling
• Complete kit includes 18-3541 thermostat and 18-0835 thermostat cover gasket
• Designed for Yamaha F9.9, F15, F25, F30, F40, F50, F60, and F70 outboard models
• Meets or exceeds OEM specifications for quality and performance
• Engineered to withstand harsh marine environments
• Direct replacement for easy installation

Sierra marine parts are manufactured to rigorous standards and are trusted by OEM engine manufacturers and boat builders worldwide. This thermostat kit ensures your Yamaha outboard maintains the correct operating temperature, protecting against overheating and maximizing engine efficiency and longevity.