by Brett Wolfe 1993 U240
To convert from Liquid to HIGH-PRESSURE Vapor on Onan Generator:
The close liquid port on the propane tank.
Bleed off pressure by running the generator or just barely cracking the line at the tank.
Cap off the liquid tap.
Get a “T” that screws into the POL fitting that goes into the vapor port.
Come off that with ball valve (my suggestion) and then attach a line to the generator to the “middle of the T”.
Reattach house propane regulator to bottom of “T”.