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Is this a 4BGE set?
If not, let me know. One of the most common problems when this happens is an oil pressure switch that is "stuck" and another is low oil volume. Be sure that is checked. It can be other things as well. Please get back to me with the complete model number and I can assist you further here. All follow ups are included in our fee.
Open up the cover and look at the data tag and give me the complete model number. I can help you once I know that and be more specific.
Could that maybe be "4BGE....." on this?
I am pretty sure it is and I am attaching a Trouble Shooting guide from Flight Systems who make great quality after market boards for these. Print it out and read through it. It give some steps of things to check for this problem. If you have a small digital multimeter that would help here as well. About $20 or so at most hardware stores. Please get back to me once you do this checks and having a service manual would be very helpful here. I can grab a link for you on that as well. Several good sources out there online. https://www.flightsystems.com/pdf/onan-rv-troubleshooing-guide.pdf
I am attaching a link to a good source for those. http://www.smokstak.com/forum/showthread.php?t=100518
Here is a link to a parts source. Amazon is another. If you do need a new controller or control board I would go with Flight Systems and I think they list those for you. It is based on the model and Spec number, which on yours is "C" according to what you gave me. http://www.partsfortechs.com/asapcart/page.html?chapter=0&id=7
It could be, but not likely.........about 4 psi is the norm. I would check the oil pressure switch as that is a common cause when it sticks. Did you print out the trouble shooting guide?
I would get a copy of the Service Manual for this. I haven't worked on this set in my shop for some time now and don't recall all that from here. I am at home right now.
This one should work fine. He sends these out if you ask. http://www.smokstak.com/forum/showthread.php?t=100518
Just checking back in to see if you were able to get this resolved or do you still need some additional input from me here?
O.K..........get back to me when it quits! I used to live in Orlando, so I know how it can rain there!
Unplug each of the leads into the control board and plug them back in again. It might be just a bad contact. If that doesn't help it sounds like a bad board. See those trouble shooting steps in the link I gave you. Eliminate them one at a time.
Just checking back to see if you were able to resolve this issue with the material I provided or do you still need some additional input from me here?