After repair and assembly, ( is was lying apart for a year, i had no spark at upper cylinder. I moved motor to another stand where I had easyer acces to pull rope, and started troubleshooting. After 4-5 full pulls in rope, no 1 began to spark now and then with a weak blue spark. I measured current on leads to coils and found only half on upper lead. Then again after another maybe 5 pulls, fine spark on both. I swear all connections were blank metal, and clean, this one is build for myselves. Anyone ever tried this ?? Can I rely on this power pack. I asked the question in another post, how does the powerpack know which plug to fire ??? are there magnets with reversed polarity in flywheel ?