Ok good, so YOU know the engine has run. I doubt your source coil would be the problem. Do you have a local small engine shop? Zenoah engines are used in Redd Maxx power products. They may have a replacement coil or be able to get it cheaper than Horizon Hobby. The other option would be to go electronic ignition. CH sells a complete kit that uses the orignal source coil. This is what I have on my G62.