Try a simple jumper wire from the positive battery post to the positive coil post. This will bypass the whole elictrical system. If it runs after you release the starter, then its in the wires someplace. If it still won't run, get a squirt bottle with fresh gas in it, and spray down the carb. as someone cranks it over, if you can keep it running with the spray bottle, you have a fuel delivery problem. If it don't run with eather of these, look for a mechanical problem, broke intake, stuck valves...... Joe
