Fuel Capacity

Can't find a whole lot on this. On my 4100 I have the single tank with fueling hose setup with the Onan 5500 gasoline genny. It seems this is a 30 gallon tank, can anyone confirm this, or is it an 18? (Preferably with a link to a HL spec location?)

That is correct. I only have a single tank as well. I know I have seen it somewhere in the paper work, brochures or other. I don't know if I have ever filled it up from empty. It has always had a good residual when I have pulled it to a pump. I use 5 gal cans to add gas when it's parked for a long time.

I have two tanks and the one attached to the fuel station is 30 gal. The one for the gen is 18 gal. So I would assume if you only have one tank then it is 30 gal. These tags are on the side of the tanks, drivers side, look below fuel station.

Ah a plackard.