As the title says, the Onan QG4000, Spec R generator on my 2021 Thor Axis won't crank. When I put it up for storage a few months ago I ran the generator for 30 minutes to circulate stabilized fuel and warm it up. Now two months later it won't start and it hasn't moved since before.
I spent an hour or so at my RV trying to troubleshoot this problem. The generator wont crank using either the on generator switch or the coach switches.
So the first thing I did was check for incoming voltage at the big lug on the starting solenoid- yes. Then I jumpered the two big lugs on the solenoid and the engine cranked. Then I jumpered from the big +12V lug to the farthest small lug on the solenoid and it cranked.
All of this seems to point to a 5A fuse protecting the starting circuit being blown, but... I am not sure there is such a fuse. The service manual I have goes through Spec G but mine is Spec R. Spec G has a fuse right over the on generator start/stop switch, but there isn't one on my Spec R and a thorough search didn't find one.
So does anyone have a Spec R service manual they could share- firstname.lastname@example.org
? Or any ideas?