Sierra 18-3684 Suzuki Outboard Thermostat Kit 140°F

The Sierra 18-3684 is a high-quality replacement thermostat kit designed specifically for Suzuki outboard motors, helping regulate engine operating temperature to ensure optimal performance and efficiency. This thermostat features high-quality, corrosion-resistant components with high-end thermal actuators that allow for superior open and close accuracy and repeatability.

Key Features:

• Temperature rating: 140°F (60°C)
• Corrosion-resistant construction for marine environments
• High-end thermal actuators for precise temperature control
• Designed specifically for Suzuki outboard motors
• Easy to install with precise fit

Replaces OEM Part Numbers:

• Suzuki: 17670-94400, 17670-94401, 17670-94402, 17670-94403, 17670-94404
• Johnson/Evinrude: 5031758

This thermostat kit is compatible with Suzuki DF Series outboards including 9.9HP, 15HP, 25HP, 30HP, 40HP, 50HP, 60HP, and 70HP models, as well as DT Series 35HP and 40HP engines. This is a crucial component for maintaining your Suzuki outboard motor in top condition and ensuring smooth, reliable operation on the water.