I have an old Miller welder with a bad idle control module. It's supposed to energize an electromagnet-type (pull) solenoid mounted on the carburetor which pulls the governor arm to the idle position, and to sense when there is weld current, in which case it deenergizes the idle solenoid. The idle solenoid still works. The bad part is obsolete and unobtainable.
I'm wondering if there isn't a way I could rig a remote switch to turn on or off that solenoid by hand. It would be a pain, but better than having no idle control at all.