Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
On/ Off switch is just a grounding switch. It grounds out the kill circuit , which shorts out the engine coil. So if it will run with the kill wire removed from the coil, the problem will be the oil pressure switch or the kil switch, yo say oil pressure switch checks out, so it has to be the keyswitch or harness to it.