Customer complains that it will not start, and ive verified this haha He brought a new carb for me to put on it, but before i did, i checked the coil. It was showing no spark at all. After replacing it, it sparks like a champ! I reassembled the thing and tried to crank it, it will sometimes hit, but will never stay running. Since he brought the carb, i intalled it, only to find the same results. I did remove the old fuel, and put fresh gas/2cycle oil in. When the thing does hit, it seems to smoke a lot, but i assume its just excess oil in the cyl. after all that unsuccessful cranking. Plug is always getting spark as well. I did look up some carb adjustments, and found to screw high and low idle screws in and then back them out 1 turn to start as a basic setting. Is this the correct way to do the carb adjustment? Any ideas or suggestions? Thanks guys.