This carburetor has duplicate main metering systems for both of its barrels. In this description, reference is made to only one of the systems for purposes of illustation. The airflow through the carburetor at normal cruising speeds creates a drop in pressure in the venturi. The float chamber is vented to the interior of the carburetor air horn and the air pressure in the float chamber is higher than the pressure in the venturi. This pressure difference forces a metered flow of fuel through the main metering system and out of the main nozzle which is located in the venturi.

The fuel is metered by the main jet as it flows into the bottom of the main well. The fuel then passes out of the top of the main well into an angle channel in the nozzle bar where air from the high speed bleed is mixed with the fuel. The high speed bleed introduces a properly increasing amount of air to the fuel at higher speeds to counteract any tendency toward a richer mixture. This emulsion of fuel and air also vaporizes more readily that the raw fuel when it is discharged.

The emulsion of fuel and air flows out of the top of the angle channel, down through the specially shaped discharge nozzle, and is discharged into the airstream in the venturi. To further improve vaporization, more air is added to the fuel by the air bleed plug and by diagonal passages in the bottom flange of the nozzle.

The throttle plate controls the amount of the fuel-air mixture admitted to the intake manifold, regulating the speed and power output of the engine in direct accordance with accelerator pedal movement. Some versions of this carburetor model also have a simple clutch linkage which enables the driver to operate the throttle plates by hand with a control knob on the dash or instrument panel.