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I sounds like you are having issues with the fuel boiling/evaporating out of the carburetor. An electric fuel pump, insulating the carb with a phenolic base plate and rerouting your fuel line away from direct heat soak could help.



Same issue here. I am going to install a small electric pump to prime the system. Last summer I put about a half inch of gas in an old spray paint cap and left it on the bench next day it was gone, and I mean bone dry in less than 24 hours. It evaporated that quick.