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Have a onan gen set for rv model 4.0 ky-fa/26100H changed starter and solenoid. put back into rv and gen runs for approx 15 secs, then no fuel, put 12vdc to fuel pump and monitor control board vdc is 5.4. with 12vdc appiled to fuel pump, unit runs great. what else is there to look for, I have changed the control board thanks garrett

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  • rely98 Sep 28, 2010

    all new fuel and filters. just a note. the new control board and old control board just delivers 5 or so vdc to the fuel pump, could there be something i;m missing

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Hi Garrett. The symptom your describing is due to a fault detection shutdown.
Faults:
Low Oil Pressure
Low Oil Level
High Temp
Low or High Generator voltage output.
Low or High frequency output Below 55Hz and above 64 HZ
Any one of those faults will terminate the run cycle by cutting off 12VDC to the fuel pump and Carb solenoid.

Check your oil level and make sure it is completely serviced to the full mark. I tend to think that during the removal and reinstallation process the oil level changed just a bit as it was fine before removal of the unit and had a problem after you re-installed it.
Also check the generator output voltage by having a meter connected to the output terminals of the generator as you do a start. If you have a voltage problem the fault circuit will be activated and the unit will shut down. Take a look at the starter solenoid to make sure you have all the wires connected properly. You could very well have the 2 smaller wires reversed on the solenoid.

Thanks for choosing FixYa.

Kelly

Posted on Sep 29, 2010

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Change the fuel filter and siphon out the old fuel and replace with brand new fuel. J.

Posted on Sep 28, 2010

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