Today I had to diagnose an electrical glitch. It was fine on the way to work the other day, but after being exposed to a brief downpour of rain it wouldn't run for the trip home. So I started testing things and came to the conclusion that the black wire from the magneto wasn't doing anything. Changed the magneto out and it fires up again. Siliconed it all up putting it back together, and it should be good to go for the trip to work in the morning.