Hi Greg, just a follow-up note. Our Genset has three sensors that has nothing to do with the generator section output, but do protect the engine while unattended; coolant temperature, oil pressure and exhaust temperature. Any of those exceed preset limits will shut the engine off. There is also a circuit breaker for the generator section, but have never had to fool with that. As you say a service manual with it's trouble shooting guide is a good start. Please let us know what you find out.