Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Code 36 is not Low Fuel Cut Off. There is no code for low fuel.
But the low fuel cut off is not an electrical item - it is in the pickup in the fuel tank. The fuel level simply drops to a point below the pickup tube, and the genset can't get any more gas.
Code 36 is Engine Stopped Without Command from Controller. It IS almost always a fuel issue.
If the genset is running for more than about 10 minutes before it shuts down, this is usually a bad fuel pump, although there are other things it can be.
What is the model number of the genset?
What is the part number of the manual you are using?