Suzuki DF4/DF5/DF6/DF15A/DF20A Thermostat (50°C) 17670-91J02

The Suzuki Thermostat 17670-91J02 is a genuine Suzuki OEM 50°C (122°F) water thermostat designed for select portable DF-series four-stroke outboards. It regulates cooling-water flow through the engine, helping maintain proper operating temperature and reliable cooling system performance.

This thermostat is used on select DF4, DF5, DF6, DF15A, and DF20A outboards. Replacing a worn or sticking thermostat during cooling system service helps support proper temperature control and efficient engine operation.

Compatible with the following:

• Suzuki DF4 (Select Models)
• Suzuki DF5 (Select Models)
• Suzuki DF6 (Select Models)
• Suzuki DF15A (2018-Present)
• Suzuki DF20A (Select Models)

Replaces/Supersedes: 17670-91J00, 17670-91J01

Exact fitment can vary by engine model, model year, and serial number, so compatibility should be confirmed before ordering.

To Confirm Compatibility: Contact our team with your engine model and serial number before ordering. Call 727-596-5929 for assistance.