Afternoon. I am sorry if this has been posted, I could not find it. On the surface this question seems simple to me, but likely more complicated than expected. I picked up a MEP-804b genset with 46 hours on it a couple of months ago. Finally got the house and generator wired by an electrician that mostly does generators. He wanted to do a couple of checks before connecting to the house to avoid any possible damage. When I flip the switch to the closed position he gets the appropriate volts, amps, whatever in the wire, but the switch does not stay in the closed position. When I let go of the switch it returns to the mid position and no more electricity. Is this a 3 position switch that is supposed to stay in the closed position? If not, will the circuit remain closed if I have the generator connected to the house/load? Courtesy plugs work fine. It is wired single phase. Thank you for your insights.