Hi all. I put a coil in Brutus and I still have the same condition. Runs good until you shut it off and then there is no spark at the plugs to get it running again until it cools off. This has a Magnetron ignition on it so there are no points. It operates like a magneto on a Farmall Cub. You ground it to stop the engine. I pulled the wire from the switch to the ground terminal that is on the engine when it was running and turned the key off and the engine kept running until the wire was plugged back onto the ground terminal. There is a wire that plugs onto the coil and runs the to ground terminal where the wire from the switch plugs into. You can see it in the photo where it shows the ground wire terminal.
So the only things in the ignition system are the coil, plugs, plug wires (new with coil), ground terminal, wire from switch to ground terminal, and the wire from the ground terminal to the coil.
I have found something odd. When it will not start if I take a screwdriver and put it in the end of a plug wire and turn the engine over and watch for spark there is none holding it close to a ground. The odd thing is if I let the screwdriver touch the ground while the engine is turning over then I will get spark again. I can plug the plug wire back onto the spark plug and Brutus will start.
Have any of you out there ever ran into anything like this?
I am going to go back out and get it in the no start condition again and then pull both wires off the ground terminal and see if it will start then. If it does I will know there is a problem with the isolator where the ground wires are connecting to.