Onan oil change now not running

Dying after several minutes would seem to be heat related to me. I've heard that the fuel pumps somewhat often get heat-sensitive when they're dying or dead. These are pretty standard low-pressure electric fuel pumps, not difficult to get from auto parts stores etc. It's located underneath the starter solenoid and control boards on the left side of the generator; some quality time with a Torx screwdriver will get it out.

I think I've heard of a case where the coil also became heat-sensitive and would cut out after several minutes here, but that's not quite so common. It's possible that other electrical parts could similarly have trouble. I would check or replace the fuel pump first.