Vacuum/Thermostatic Bowl Valve
- With valve at a temperature of 90° F (32° C) or less, airflow between carburetor port and canister port of valve should be very restrictive or not allowed at all. See Figure .
- With valve at a temperature of 120° F (48° C) and without vacuum applied to vacuum nipple, air should flow between carburetor port and canister port. With vacuum applied at vacuum signal nipple, air should not flow between carburetor port and canister port.