[KJReed]

Made it to Knoxville and parked the coach at my uncle's place. He is a diesel "guru" from his 40+ years around truck diesels and marine application diesels. I had him take a look and within about 10 seconds he determined the problem is the stop solenoid. The wiring to the solenoid is burnt up so it's likely a short with either the wiring harness or the solenoid itself. When we manually activated the solenoid by pushing in on the "throttle arm" the generator started and ran just fine.

I plan to make an appointment with Russell coach as recommended by Ron to get the wiring and solenoid checked and replaced as needed.

Thank you again to everyone for assisting with the troubleshooting!