try not to fiddle with any of the adjustments if you can help it but if your lucky it will just be a dirty carb the main jet in there will be in the middle when you take the bowl off and will take a jet screw driver to get it out without rounding it. if you don't have one of those make sure you are perfectly square with the jet or you will round it and cause yourself even more of a headache. oh yeah, don't get anything on the gaskets and put the gasket for the bowl up on the carb not on the bowl when you put it back together
good luck calvin