Re: 1975 Johnson 75 hp fights back
Re: 1975 Johnson 75 hp fights back
Sounds like you're backfeeding the high voltage side of the coil through the wiring. I suggest checking and rechecking all connections to be sure they are correctly installed and clean / tight.
I agree with above, look at the grounds.
Oh, don't run it until you identify the problem, most wiring is sort of shy about 30k voltage running through it...