SIERRA 18-3549 Cooling Water Thermostat

Compatible Engines

The SIERRA 18-3549 cooling water thermostat is a critical component of the cooling system, ensuring optimal operating temperature for your outboard motor. By precisely regulating coolant flow, it prevents the power unit from overheating in demanding operating conditions. Note: available technical data does not specify exact engine models compatible with this part. Compatibility must always be verified by the manufacturer's catalog number (18-3549) or the original OE number. If in doubt, we recommend contacting our support team.

Installation and Operation

Replacing the thermostat is a procedure that extends engine life. Regular inspection of the thermostat condition prevents sudden breakdowns on the water. We recommend replacing it with a new element at specified intervals or when signs of unstable operating temperature appear. Professional installation guarantees tightness and correct system operation.

• Precise regulation: maintains a constant temperature of 49 °C (120 °F), protecting the engine from overheating.
• High quality: the SIERRA brand product is characterized by durability and corrosion resistance.
• Optimal performance: ensures rapid engine warm-up, leading to better efficiency and lower fuel consumption.
• Easy installation: the standard shape facilitates replacement in most cooling systems.

Care for your engine by choosing proven spare parts. Sierra 18-3549 is a guarantee of reliability on every body of water.