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Old 03-10-2023, 10:07 PM
Dave Neptune Dave Neptune is offline
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The Emulsion well is where the fuel is first started mixing with air. The vacuum of the engine sucks air into the well to mix with the fuel from the main jet before the "mix" is directed to the venturi in the throat of the carb to be further mixed with the air going through the carb. This "mix" must be correct for proper burning in the cylinders.

The "E-well" is the protrusion in the center of the float bowl toped by the "air jet" that regulates the air going into the well to be mixed with the fuel (the brass tube with holes in it) from the main jet just below the well. The top of the well must be sealed via the Hole in the gasket to control proper fuel mixing. The air for the well that travels this path is drawn from the throat of the carb to balance the carb mixing across the RPM (load) band.

If it leaks the carb will not work properly causing loss of economy, smooth running and power.

it is why you should always use a fresh gasket for a good crush of the gasket creating a proper seal. Check the old gasket for a full circle indentation in the center meaning it was a good seal.

Dave Neptune
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