Rochester 4 Jet Float Bowl Vent

Some of the 4 jets have a float bowl vent on top of the carburetor. Not all have this particular vent.

4 Jet Bowl VentThe vent is operated by the accelerator pump lever and is used to vent the float bowl so that the bowl doesn't bleed gas.

A - Rubber vent valve, which opens when the accelerator is pushed down.
B - Accelerator pump Arm, which controls the pump and the vent.
C - Accelerator pump.

4 Jet Vent
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