Ok... calling all you onan genset specialists out there. On my latest trip, my genny quit right after arriving at campsite.
Guilty, it was overdue for its oil change and it was nearly a quart low. After letting it cool, I topped off the oil and tried to refire. No joy! When I start (try) it acts like it tries to run until I let off the switch. If anyone knows any quick diag tricks, I'm all ears....
This may sound silly, but same happened to me, I even replaced my fuel pump, it ended up being the fuel level in main tank was too low (fuel gauge wasn't working at the time).. Main pickup sits lower in tank than the generator pickup and so it will die fro lack of fuel before the engine does.. It's a safety feature to keep from using up all your gas with the generator and getting stuck in the middle of nowhere without gas..
You need more than 1/4 tank for generator to run.
Get the model and serial number. Model number should be something like 6.5 NHE FJ/13566C. From there we can determine the Spec and correct service manual which you can download from the Members Fee Manuals area.
From there we start isolating what the problem is.
Dave
6.5 NHE 1P/26100A Serial A870 861433
Voltage regulator.....possible.....
http://www.partsfortechs.com/asapcart/pdf/ONAN%20Troubleshooting%20for%20RV's.pdf
I got it to start and run but it is hunting and surging. I flipped the breakers on the side so as to not cook any electronics inside
I guess its time to break out the DVOM....
corrected number
Quote from: enigma960080 on July 22, 2014, 08:34 PM
6.5 NHE 1R/26100A Serial A870 861433
6.5 NHE Spec A, built January 1987
Operators Manual 940-0122 (http://rich.homeunix.com/gravely/engines/onan/all-manuals/940-0122.pdf)
Parts Manual: 940-0228B
Service Manual: 940-0502 - In our members free manuals area
Your description indicates K2 is not energizing which most likely means you need to clean the rotor where the brushes ride.
Hunting & surging is typically carburetor adjustments
Dave
Thanks Dave...