[bestgenman]

I suspect the starting of the generator was caused by the remote wiring being involved in another wire shorting event.  The generator remote is a three wire system, start, stop, & ground.   The start wire became grounded remotely starting the generator.   Since there are multiple switch points, any one can be used to operate the set and they are all connected to the set by a plug arrangement.  Unplugging that remote cable would have stopped the starting but I’ll bet the starter was already suffering.

Inspect the generator wiring without the remote cable plugged in since that is where the problem started.  After it is back to normal, work on the remote wiring.