Cooling Thermostat SIERRA 118-3623

Compatible Engines

The SIERRA 118-3623 cooling thermostat is a critical component of the cooling system, responsible for maintaining the optimal operating temperature of your outboard engine. By precisely regulating coolant flow, it prevents the power unit from overheating under demanding operating conditions. It is important to note that this product features a sensitive opening temperature of 50 °C (122 °F), which is vital for proper system function in specific applications. Since source data does not list specific engine models compatible with this part, compatibility must be verified using the manufacturer's catalog number (118-3623) or the OE number. If you have any doubts, we recommend contacting our support team to select the correct part.

Installation and Maintenance

Replacing the thermostat is a task that should not be taken lightly. We recommend regular inspection of seal conditions and the cleanliness of the thermostat housing. Using genuine SIERRA parts ensures long-term sealing and reliability. Remember to thoroughly clean contact surfaces of deposits before installation to prevent leaks and improve heat conduction. Professional installation extends the engine's lifespan.

• Genuine SIERRA part with catalog number 118-3623
• Opens at 50 °C (122 °F)
• Ensures stable engine operating temperature
• Easy installation after compatibility verification