Help! Onan 4K generator refuses to start and stay on

What worked for me is to start it up with no loads, zero, and let it warm up before adding devices.
Refrig, converter, water heater, air conditioner, space heaters, and any other 120 volt devices you may have, Microwave, tv's.
I also never park for more than a couple weeks without gas stabilizer in the tank.
Fault 36 is a catch all with fuel related at the top but electrical issues not far behind
Good Luck