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Runs Cold, Not Hot

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83 Big Red.

Issue: Starts second pull with choke when cold. Runs and idles fine for about 5 -10 minutes then dies. Acts like a vapor lock starving for fuel but pretty sure it isn't because then it will idle high with choke fully engaged. Any throttle response kills it. Let it sit for awhile and starts back up and runs until hot.

Preventive maintenance nut. Air filter clean. Carb has been rebuilt twice (me and shop). Same issue. Could it be something electrical like a CDI/coil failing when it gets too hot?

Thanks. :bonk:

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Make sure fuel is flowing out of the tank/petcock next time it goes to die take the gas cap off the tank and see if that fixes it and if that doesnt make sure you petcock is not clogged and letting your fuel bowl go dry.

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