I think the difference here is Koda and I have electric fuel pumps, that push the fuel through from the tank. This is pretty different than your rig I believe. Without that pump, you would be very correct as air would prevent a restart. Your rig needs to suck the fuel from the tank. Of course to create that suction, the engine needs to be cranked over.
I asked whether he fills the filters because,,,,, I've read that when you are working on a fuel system with an elec pump, it is better to install empty, and let the pump fill the filters as this prevents any chance of getting crud in the filters via a manual filling. Using this process, all fuel delivered to the engine follow the normal path, through the filters.
I asked the question because,,,, I'm not sure where the air goes if you do that? Pushed back to the tank via the return line? (my guess)
2008 Thor Mandalay Presidio, 400 ISL
RVing since 1974!
Lots of Motorcycles