Rick, are you aware that you can prime (run the fuel pump) by just pressing and holding the STOP/PRIME button on the genset and listen for the pump to click? I do this if the genset has not been run for awhile. As for the fuel line it should run at least down to a 1/4 tank, Could be your fuel gauge is off.
Othertonka
2004 Southwind 32VS 8.1 Workhorse chassis
2002 CRV Toad
U. S. Gear Unified brake system
Retired Fire Captain, SFD