All System Purge
With the carburetor fuel valve closed, the pressurized air passes through the purge valve and into the cavity of the carburetor. One part of the air flow cleans the inside of the bowl – the mixture of fuel and air escapes through the bowl vent port located on the inner face of the carburetor. The second part of the flow cleans the main fuel jet and the emulsion tube – the air escapes inside the carburetor Venturi. The last part of the air flow cleans al the idle passages and the very small idle opening on the inside of the carburetor. The small transition ports get cleaned with the same air flow.