Some plastic floats have metal tangs to adjust and some do not. If your float does not have the metal tang which limits travel than your fload is non adjustable. It could also be trash in the needle /seat. When the float rises it pushes on the needle closing off the flow of fuel into the bowl. If it does not close the bowl will keep filling with fuel until it comes out the vent. If you do have the metal tang on your float you would bend to limit floats travel. With the bowl removed hold carb in its upright position than observe the position of the float. On the side of the float you should see the seam the 2 halves were joined at. This seam should be parralel with the rim of the carb . If the adjustment is off just bend the metal tang. If the float has no metal tang than clean the needle and seat really good. TOM
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