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#1
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Check out http://www.cub-club.com/PrintedTechlist12.2.04.doc and you
can find float level setting instructions for this carb. I don't know this carb specifically, but most lean the mixture by applying differential against the float bowl changing its level. I'm guessing the float level is too high to begin with. |
#2
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Float level is set with washers under the float valve seat.
Dan |
#3
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I should have been a little more specific. The float level is set
with shimming washers under the float valve seat; they're fiber washers that come in a couple of thicknesses to get the level right. If the carb is a bad dripper the float might have a pinhole leak in it and be partly filled with fuel, making it sit lower and allow the level to rise enough to drip out of the main nozzle. The mixture control doesn't change the float or fuel level. It applies a bit of venturi suction to the bowl, reducing the atmospheric pressure in the bowl and holding the fuel back. The bowl is vented to the venturi wall, and another port passes through the mixture control valve to a dead-air space behind the venturi that has normal atmospheric pressure. The venturi suction is constantly drawing air from behind the venturi through the bowl's airspace, and pulling the mixture to lean closes off the atmospheric pressure supply and lowers the bowl pressure. At idle or low power settings, there's little or no venturi suction and the mixture control has no effect. Dan |
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