I am trying to get my son's engine to start. Of course he didn't use STA-BIL over the winter season! The engine will start and run for a few seconds when sprayed with starting fluid. This is what I have done so far: I dumped the old gasoline. I removed the fuel bowl and cleaned out the gummy residue. I blew out the lines from the tank to the carb. I am now able to get gas spraying into the carb when hitting the prime bulb. The air filter looks okay. Not sure how to proceed. Any help would be appreciated.