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The low-pressure area created by air rushing past the booster venturi initiates fuel flow from the float bowl through the main jet. The main jet size determines the amount of fuel delivered to the boosters and into the engine. The pressure in the narrow point of the venturi is lower than the air pressure above the venturi. When this occurs, atmospheric pressure pushes fuel from the float chamber through the jets and into the engine.
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The low-pressure area created by air rushing past the booster venturi initiates fuel flow from the float bowl through the main jet. The main jet size determines the amount of fuel delivered to the boosters and into the engine. The pressure in the narrow point of the venturi is lower than the air pressure above the venturi. When this occurs, atmospheric pressure pushes fuel from the float chamber through the jets and into the engine.  View Related Article

 

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