Get your Suzuki running at its sweet spot every time you drop the throttle with the Suzuki Thermostat – 17670-90J01. This OEM 60 °C (140 °F) valve opens right when your DF-series four-stroke needs it, sending coolant through the block to hold steady operating temperature and protect those tight clearances inside the powerhead. Built with corrosion-proof brass and stainless components, it stands up to saltwater and ethanol-laced fuel vapor without sticking or scaling.

Why this little part makes a big difference

• Exact-match fit for DF70A-DF140A inline-fours and DF200-DF300 V-6 models—no filing, bending, or guessing.

• Fast warm-up. Closed position keeps heat in the block for smoother idle and better fuel burn on chilly mornings.

• Precise 60 °C pop-off. Opens cleanly, preventing hot spots that can cook gaskets or warp heads.

• Marine-grade construction. Nickel-plated frame and high-tension spring shrug off corrosion for seasons of reliable cycling.

Swap it every two seasons—or any time you see creeping temps on the gauge—and you’ll cruise longer without the nagging worry of overheating. Keep one in the spares kit and give your Suzuki the gift of perfect thermal control out on the water.