My old faithful's starter button stopped working suddenly. I can still start the tractor fine by jumping the starter motor, so that works. I tried jiggling the shifter so I doubt it's the safety. And when I put a voltmeter on the posts of the starter switch, it reads 6v, and then drops almost all the way when I push the starter button. In other machines I'd think "solenoid". But my I&T manual only shows the 8n starter circuit, and of course the 8n has a solenoid mounted on the starter motor can. Any suggestions? Any tips where to find a 9n/2n diagram for the starter circuit?