Thank you for the reply, I am going to check the timing module.Are you sure the key is actually doing its job? I think the sequence may vary from tractor to tractor. I've read that the failure mode on some stop solenoids is to stay on. Power is briefly applied to turn off the solenoid to kill the engine on some models. There may be some kind of timing module involved. You may want to track down a schematic to see what's going on with your tractor.