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Old 12-27-2019, 08:26 PM   #5
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Join Date: Jun 2010
Location: Detroit suburb, MI
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Default Re: Fuel Evaporation or leakage from the carburetor

It's not very likely the carb is leaking down internally unless there is porosity in the bowl (very unlikely). The float valve is above the fuel level, and the power valve is not the type like in other carbs with a rubber diaphragm that can deteriorate.
I'm betting it has to be evaporation from shutting off a hot engine. Especially with the amount of ethanol in the fuel these days. Sal
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