No air screw? Is this crazytown?

[chef1366]

No, this is funkytown.

[Don-lo]

I loosen those mixture screws by putting light oil above the screw and using a heat gun on the outside surface. In a few seconds you have bubbles coming up through the threads - that's usually enough, don't overdo it. I find it very curious that he says "Where the air screw is supposed to be I see a pin hole that goes straight through the main body of the carb into the engine side of the carb". This almost sounds like the caps are already off and the screws are missing. Pics would be nice.