I have been having problems with the engine shutting down. Anyway, I noticed the ground for the powerpack was loose and corroded. The ground wire was through the bolt that mounts the powerpack. I tried to remove the bolt and it broke. So I extended the ground and relocated it to another powewrpack mounting bolt. Thinking I had maybe found the problem, it just got worst. Now, I have no spark on any cylinder. I removed the black and yellow wire on the key switch and still no spark. I even tried to relocate the ground again and still no spark. How can I test the powerpack with a regular volt meter? I also ran across a trouble shooting guide that said to remove the balck and yellow wire from the powerpack. The only black and yellow wire is in a plug and I dont want to cut the wire. Any suggestions.....