Just happened to note the following on the main forum web site under RV Generator troubleshooting tips
"Generator starts, then fails to run: Low oil level or low oil pressure, Low fuel supply, press the prime switch the recommend length of time, sticky choke linkage, or check the generator AC voltage output. Other voltage tests require an Operating Manual, Troubleshooting charts and learned personnel."
I've heard of others having problems with faulty sensors as well, so even if your oil is up, the sensor doesn't see it.
HTH
Chris