What's the correct procedure for setting point gap? Do any of you have a best practice you follow?

What about adjusting a carb? Is 2 turns out a good starting point for the mixture?

I adjusted my idle screw to keep it running then played with the mixture screw and lowered the idle back down. Ran good, then the next day it started, but bogged down and died when I gave it gas. Now, it doesn't want to start again.

Thanks,
Jeff