I've searched online and here on the board, haven't found an answer yet---
Onan 4000, which is in our 1995 32' Party Cruiser (boat)-- I don't know the model but it's basically identical to the 4000 that was in our 1992 Winnebago, it's not a "marine" version, or a newer 'computerized' genny...
Last time I used it was early last year, just to see if it was working, and it worked fine, powered up the AC while I vacuumed out the boat...
Last weekend it fired up after its usual 10 second first-season-start waiting time. Only the light on the remote power switch didn't light up and the power gauge didn't budge. And it stops upon releasing the switch.
Keeping it running with my toe on the switch I found no power output anywhere. The on/off switch on the genny does the same thing. I checked the 5 amp fuse, it was fine. I removed the wire connector on the side, no loose wires or other issues. I flipped the breaker off and on, but I know that doesn't have anything to do with the light on the switch getting power anyway, it's only for the 120vac out...
I did find online this info: The battery powers the ignition until the genny powers up, then it takes over all 12 volt activity. In order for the genny TO power up, 3 things must happen:
It must receive a "start" signal-
It must receive an "ok" signal from the oil pressure switch-
It must NOT receive a "stop" signal...
What I didn't find online is how to troubleshoot, or find the various parts TO troubleshoot...
I'm pretty sure it's not receiving a stop signal, as I know that while stopping the genny with the switch, the switch light remains ON until the genny fully stops...
This leaves either an oil pressure issue, or...?? --I just need to know where to look!
Any advice, diagrams, anything would be great, thanks!
<edit>, found a pic that shows the genny and the model/serial number. (forgive the grime)