Suzuki DF100A-DF140A Thermostat 17670-90J21

The Suzuki Thermostat 17670-90J21 is a genuine Suzuki OEM cooling system component designed for select DF100A, DF115A, and DF140A four-stroke outboards. This water thermostat regulates coolant flow through the engine, helping maintain proper operating temperature and efficient cooling system performance.

The thermostat is part of the outboard cooling system and should be inspected during cooling system service or water pump maintenance. Replacing a worn or sticking thermostat helps support proper temperature control and reliable engine operation.

Compatible with the following:

• Suzuki DF100A (2013-Present)
• Suzuki DF115A (2013-Present)
• Suzuki DF140A (2013-Present)

Exact fitment can vary by engine model, model year, serial number, and thermostat configuration, 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.