Don, unscrew the spark plug out of the head and reconnect the spark plug boot, hold it by the boot or the wire, with the ignition on, spin the prop, you should see the spark jump across the plug gap. The plug is grounded to the ignition box by the boot and wire so you dont have to hold the plug against the cylinder to make the ground. You should see the spark jump pretty easy if not, dim the lights. Let us know what you find.