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Old 09-16-2021, 11:53 AM   #14
rotorwrench
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Join Date: Jun 2010
Location: San Antonio, Texas
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Default Re: Flat spot that just won't go away

The accelerator pump and the power valve are the circuits in the carb that affect acceleration if all else is in good working order. The accelerator pump has to push a steady stream as the throttle opens. The modern replacement power valves can have trouble fitting against the seat in the carb body since they aren't made correctly for the most part. Charlie ny here on the forum has a fix for that. The power valves can blow out too and cause fuel to leak out of the float bowl after shut down making for hard starting plus they don't work when blown out.

Last edited by rotorwrench; 09-20-2021 at 08:21 AM.
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