trmccrary........I could but I know electricity and switches. The typical "twist-to-start" ignition switch supplies volts to the starter solenoid. The standard 8N BIG tranny thumb button GROUNDS the HOT solenoid to engage the Bendix solenoid. Just the OPPOSITE of yer typical twist-to-start automotive ignition switch which supplies volts. More better you pay attention to what others say about the SAFETY starter interlock scheme.
Most 8N starter problems are the single wire from middle of solenoid to the BIG starter thumb switch. It gitts BROKE from yer clod-hoppers kicking it as you climb aboard yer tractor. You doubt? Replace it with #14ga stranded automotive wire, enny color works just fine. Simple, eh? ........Dell, a 12V advocate for the right reasons who knows 8-ways to convert and they all work the first time