We have a 82 Pace Arrow with a gas Onan genset 6.5 with 2 fuses next to the start/stop on the Gennie the fuel pump is right next to them. I also have the rocker switch on the dash, amber in color and stays lit as long as the Gennie is running. Yes we run it for the Coleman Ac-ers on the roof while driving.
As far as movement the previous owner bolted the slide tray in place, and it don't move or shake hardly at all.
There is a (I believe) electric choke on the carb that should be setting so the top screw is @ 11:00 and the bottom screw sitting around 5:00 (on Ours). The filter is on the right hand side and is located in the rear of the Gennie ours needed to be changed when we bought her.
I am not sure as far as the gas level but my rear tank is between E and 1/4 right now (closer to E sad to say) and still is running it really runs great but it only has around 250 hrs. We just changed the 2 plugs also, so she fires right off. I have a manual if needed