just finished testing the squeeze bulb siphon fuel system adapted to my smaller inverter gen set...plumbed a 3/16" tee between the fuel shut off of the main tank and the fuel pump, then attached a 3/16 line to feed with the siphon system... 1/4" female NPT to 3/16 barb (hard to find other than on line,but a 1/4" barb can be made to work with 3/16 line)... a shut off plug will allow the OEM system to work...modified a fuel spout with some 1/2" PVC elbows for my 5 gal cans to hold the inlet fuel line, and makes it more water proof...

the siphon system worked well for Irma, and allowed me to use fuel from individuals whose refrigerators I kept up a couple of hours at a time, without hot fueling...

running the inverter on a 2 gal tank should give me all nite ceiling fan and refrigerator run time