Only runs with key in start position

[CausticUrbanCoast]

Has it been verified that he even has a fuel shutoff solenoid?

 

[bigDOJ]

The plunger on the fuel solenoid stays open all the time, even when the key is in off position. After I start engine, it closes. If I unhook one of the wires connected to that solenoid, the tractor will stay running all the time. I have to put the key in start position again, before it will die. Does that mean I need a new fuel solenoid???? Or can I bypass the solenoid somehow? or is it OK to run the tractor like that?

 

[K5lwq]

Sounds like a relay issue to me.

 

[the old grind]

If the key is on and the gauges work I suggest running with the one wire disconnected if it will. It could lead to a stuck relay. I'd connect it & check it for ground or voltage with the engine off and the key in each position. Having a schematic could aid in diagnosing with a quick look but I suspect the wiring layout isn't too complicated.