hey guys had an old mach given to me had been sitting..cleaned carbs new gas ran great for a few miles.bogged died cleaned carbs found a leak new tank grommetes and new lines. now wont fire at all have air screw out 1 1/2 turns the idle screw is a mystery they were taken out and i cannot find a baseline setting. the thing ran awesome the three times its fired. its getting gas. any ideas. a baseline of how far to back out the idle screw would be great.