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Old 08-14-2011, 08:05 PM   #1
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Need help with Onan Emerald Plus genset 4000

I have a Onan generator that will not do anything when I push the start button.
Model Number is; 4BGEFA26101G
I have 12.5 volts to generator. When I jump selenoid the generator turns over good but there is no spark to spark plug. How should I diagnose why it does not turn over when I press start button. Disconnected remote operation. I have read of Low Oil pressure switch stuck, but I don't know where it is. I have read there could be problems with the circuit board but have fount nothing to diagnose it. Anyone have any experience with this problem?
Thanks,
Doug
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Old 08-15-2011, 06:17 AM   #2
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Google Flight Systems -- they sell replacement circuit boards for Onan generators and have a pdf with some info on how to diagnose issues.
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Old 08-16-2011, 09:57 AM   #3
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Thanks, I have looked at thier site but did not find info that I needed. I ordered a new board and selenoid from a supplier, H0pe it does the trick.
Doug
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Old 08-16-2011, 10:52 AM   #4
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You said it had no spark. BGE Spec G has electronic ignition. Could be the A1 control board or the ignition system. To keep from running blind, you need to get yourself a copy of Onan BGE/NHE Service Manual 0965-0528 (covers Spec G and later). It has the troubleshooting and isolation procedures you need which will save you a lot of $ and heart ache in the end.

Dave
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Old 08-17-2011, 07:49 AM   #5
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Thanks Dave, will do.
After I put my new selenoid and new board in, if it still does not work. But my suspicion is the board but thought for $40 bucks why not change the selenoid also.
Doug
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