Re: Johnson 2R72M

[Don]

OK, so the prop does spin when you run the gas engine. Not quite sure just what/where you were testing with the test light though. Kinda sounds like you are not getting power through the switch? Try connecting the ground lead to the battery then just tapping the positive lead to the battery with the electric motor switch turned on. Any sparks?
If my hair brained theory is correct, try spinning the prop shaft with vice grips (and the spark plug lead off). Can you spin the prop shaft freely in one direction? I’m thinking that gear has some sort of one way bearing/bushing that allows the electric motor to spin the prop without spinning the gears.