It looks like you arent getting enough excitation
I checked the fuse with my MM ohms. If I remember right the fuse is a time delay reset. I did remove it to test. I did apply 24V to X and Y. I applied ground and power to the terminals with the wires disconnected. Switch between hot X-ground Y and vice versa. Did not hear anything. I did get some sparking both ways. I would think it would click like a starter solenoid. I new by the end of the day I would most likely be at the stator head. Also the gen ran for 7 hours during a power outage. Ran my house and garage. I just went out to run it, and hear I am. Is there a way to test the AC voltage regulator ? As said it does have the fuse Mod., and the varistor. I dont think I will go to the stator head, I will most likely just sell it. At least I do have a title for the trailer.Ah, I see... I read where you said Hz at 60 and everything else was working and I assumed that meant the outlet was also working.
Looking above it looks like voltage there is a gen head issue, or regulator problem.
When you said Quad fuse was good, I assume you tested with a meter?