That is the thing. There is not much to it.
The carburetor has a butterfly to adjust the flow, but propane is introduced by like 1/8" nozzle with not much of calibration.
about a foot long hose leads to regulator. It is same type of regulator I know from scuba = you need to create vacuum to open it.
Than on main propane line I have solenoid that opens propane to regulator.
The "prime" button on the panel energize solenoid, what opens propane to regulator, but regulator holds the flow till the vacuum is created.
There is nothing I can do on regulator and I took it apart to prove diaphragm in good condition.
I used to have propane forklift and that had push knob on regulator, that would introduce propane into engine, but not on this Generac.
My feeling is that the engine is not creating enough vacuum to open regulator at start up.
Still it runs perfectly after fluid start up.
I check all hoses and all looks in good condition regardless 13 years.
