Bob, my danged book is at home and I'm at "work"!!! So I don't know if it's electronic ignition or not.
Anyhow, here's stuff to check:
1. Bad plug wire.
2. Loose/grounding connections in kill switch circuit.
3. Bad condenser (point ignition).
4. Bad magneto.
5. Bad electronic module/magneto.
Hope this gets ya on the right track. I'm just gonna have to break down and buy TWO SETS of books!