| Onan Problems [message #250749] |
Tue, 27 May 2014 15:41  |
bpimm
Messages: 211
Registered: June 2013
Location: Washougal Washington
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Senior Member |
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I started working on my Onan 4K. Last year I figured out the control board was bad so I swapped in a Dino board last week only to find that the fuel pump was dead as well, it worked last year... I put in the Mr. Gasket pump and to make room for it I deleted the onan voltage regulator. I read somewhere that they caused problems and the Onan start battery will be on a combiner anyway so I pulled it off. Everything was working fine for about 2 hours running the AC as a test then it shut off and won't restart. The latching relay isn't kicking in and keeping the ignition on. The positive side of the coil is only hot when the start switch is closed, as soon as it is released the power drops as well. After more reading I found this comment in the manual. "When the starting rpm increases, the alternator develops a voltage great enough to be rectified and energizes relay K2. Relay K2 contacts close to hold relay K3 energized".
Question: if the voltage regulator/alternator is out of the picture what energizes relay K3 to keep the ignition on?
Also I found Duane Simmons picture of how to remove the regulator and it mentions a double plug that is removed from the regulator but the 2 wires need to remain connected. Mine didn't have a double plug with 2 wires, it had a wire from the alternator labeled AC and one single wire to the control board.
Any advise would be appreciated.
Brian & RaeDean
1973 26' #383
Washougal WA
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