In Reply to: Re: 9N Spark/No Spark posted by John Parker on January 21, 2019 at 20:15:10:
Sounds to me like a bad coil.
I had a 601 that drove me nuts for a day or 2 because it would start and run great for 5 minutes then cut off or start missing. It was the coil. Ever since then, I keep a spare around just to make sure thats not it. Your key switch going bad can do the same thing,