If it starts but won't keep running, try turning the mix needle 1/8 turn counter clockwise (richer -- more fuel). If you can't find the proper setting, lightly close the needle (clockwise) and start over. If it started at 2 turns open, use that as an initial setting. Go leaner first (clockwise) 1/8 turn at a time until you get a light backfire (lean sneeze) or it stalls. Then back the needle out 1/4 turn and see if it wants to keep running.
If still not ready for prime time, I would suspect a dirty idle circuit in the carb. (top of the carb under the domed plug, or the plastic cover (whichever you have). Clean all small holes with carb spray and the plastic nozzle.
