Have same problem; if you have a multimeter of any kind, measure from the spark plug connector to the grounded lead.
You should find resistance somewhere between several kilo-Ohms and ~ 10K Ohms.
Mine is open (infinite) = dead.
Currently looking for the coil.
You can buy a cheap meter on eBay or for a few bucks more at Radio Shack.
They will let you measure at least resistance, DC and AC volts and many have additional features. They are plenty accurate enough for home use.
Steve Allison, October 2010
