reverse ground problem

[mpbarber]

Tecumseh OHV16-204211C gets spark, will start &run with the ground wire disconnected and when I want to stop the engine, I plug the ground wire back in.

This is backwards so when I found the problem I replaced the solid state ignition but that didn't help.

Any ideas what would cause this?

 

[bertsmobile1]

That is exactly as it should work.
The safety switches ground out the coil to stop the engine via the wire you are disconnecting.
So you have a short in one of the safety switches.

 

[mpbarber]

That is exactly as it should work.
The safety switches ground out the coil to stop the engine via the wire you are disconnecting.
So you have a short in one of the safety switches.

DUHHHH.....

I have the wiring diagram so time to start tracing wires.....

Thanks bertsmobile1