I have suspected this ignition for a long time but since I have never mounted the engine in a plane it has not been a issue. Add to that it sometimes runs just fine and has never failed to make an engine run.
A guy here at work who tunes motorcycle engines said to close up the gap on the spark plug because a weak ignition can miss at higher rpm and a tigher gap might clear it up, at least worth a try.
Maybe I will steal the ignition off of my RGCF 26 and try it on the saw engine.