Keep your Suzuki running cool and clean with the Suzuki Thermostat – 17670-90J11. Tuned to crack open at 71 °C (160 °F), this OEM valve keeps DF70 through DF300 four-stroke blocks right in their efficiency zone—warm enough for full fuel burn, never hot enough to scuff cylinders. A stainless steel frame and brass poppet laugh off corrosion, while the high-tension spring prevents sticky half-opens that can send temps climbing on a long run back.

Why swap this thermostat during your next impeller job?

• Wide model coverage. Drop-in fit for DF70, 80, 90, 100, 115, 140, 150, 175, 200, 225, 250, and 300 hp engines built 2001-present.

• Precise 71 °C trigger. Fast warm-ups on cool mornings; rock-steady temps at cruise.

• Marine-grade guts. Nickel-plated spring and brass piston resist salt scale and ethanol vapor.

• Plug-and-play install. Reuses factory housing and gasket—no shimming or trimming required.

Replace it every two seasons, or any time the gauge starts to creep, and give your powerhead the stable climate it needs for crisp throttle response, lower emissions, and worry-free weekends on the water.