Originally Posted by TQ60
That is called an interlock.
The fuel supply is interlocked to the engine running.
Given it is not running when trying to start it is bypassed by a connection to the starter.
Do NOT bypass this as a leaky line could mean pumped fuel into a fire hazard.
DO get the model of the unit and Google it for a soft copy of the manual or post here as many may have it.
Follow the troubleshooting guide and it should identify a bad connection or sensor or maybe controller board.
If it has an oil filter then it is pressurized system so look for an oil sender that may have a loose wire next to it.
Take your time and be safe...
There is a relay called the CR1 that energizes the fuel pump when you let go of the start switch, but it is really buried in the back of the gen control panel behind a big wire bundle.
I discovered that the start switch has a piggyback spade connecter on one of its connections, the wire that is piggy backed goes to the fuel pump. I went to disconnect the two wires and broke the piggyback connector.
No one has these in stock, I went to6 auto parts stores and even to grainger, I had to order 25 of them on ebay, I needed the very small red connector. I think I will keep five and make four bundles of 5ea and sell them on eBay for 3 bucks.
I touched the two wires to a hot wire and one goes to the starter solenoid and the other to the fuel pump, I could hear the fuel pump run then there was a noise and it no longer runs, either a fuse blew which I cannot find or a wire shorted in that bundle, I will have to cut the tie wraps and separate the wires to get at the wire to the pump. Of course, now that have the time, it has started to rain again. Curses foiled again.......