Doing a basic rebuild on a Thermoquad for a friend. Carb has been sitting unused for years, but covered the whole time. Looked pretty nice inside and out but left idle mixture screw is siezed up in the base. I have tried gently working it back and forth with a small pair of vicegrips, gentle tapping with a hammer, a heatgun, PB Blaster, WD 40, so far nothing has made it budge. I fear it will break off if I force it more. Anyone got a secret method that WORKS??!!


TIA
Jess