A friend asked me to fix his Craftsman saw. He said it wouldn't start. It's a newer one (I believe a Poulan) Model 358.350880. When I check for spark using a tester with a light bulb in it it shows spark but with a different type of tester that actually sparks, no spark. No spark when plug is grounded either. Got a new plug, no spark. Got another plug no spark. Checked all wires from kill switch to ignition, all fine. Checked kill switch, that's working. Disconnected the wires from kill switch to I.M. No spark. So I thought it was the ignition module. Got a new one and a flywheel in a kit and installed. Same symptoms as before. I don't know what to try next. If the I.M. isn't getting a good ground to the saw could this be the cause? I don't know. I'm hoping someone has experienced something like this and can help. Any help would be appreciated.