Carburetor Thermovalve Test

Carburetor Thermovalve

NOTE: Carburetor temperature must be above the carburetor thermovalve set temperature (40°C, 104°F).





1. Disconnect the hose at the carburetor thermovalve and connect a vacuum pump to the thermovalve.
2. Apply vacuum to the thermovalve.

The valve should not hold vacuum.

- If vacuum does not hold, the thermovalve is OK. Reconnect the hose to the valve.
- If vacuum is held, replace the thermovalve and retest.