Standby Generac will not stay running

Pville area -- It ran for an hour then stopped running. I waited an hour and tried starting it again -- it starts, then stops, then starts... 15kw -- air filter is dry -- proper oil level -- no error codes. HG board indicated it may not be getting enough gas due to other natural gas users in area -- no clue.

Prior homeowner has it set up where you can only start it manually if that matters.

Any ideas?