Hi, I recently purchased a 1968 sears ss12. it was in fairly good shape but the wiring was a mess, there were wires everywhere but nothing connected. i followed the diagram below that another guy said would work. i got the motor to run but theres no way to shut it off. i have to choke the engine when i want to shut it off. i have done alot of research and it doesn't seem like im missing any wires but the wire on the flywheel housing is supposed to be grounded and run to the key switch but it has power going to it. can anyone tell me what may be going wrong or put me in the right direction?