Re: [Amel Yacht Owners] ONAN MDKVA Generator running problem

Bill & Judy Rouse <yahoogroups@...>


Let me try to help you via long distance, as best as I can:

The Onan on BeBe has a Governor, Actuator  Part Number 306-5006-01 which replaced old#151-0779-01 . This governor keeps the Onan engine at 1,500 RPM regardless of load. As the load increases, RPM the governor increases the throttle to keep the RPM set at 1500.

The governor is controlled by the PCB electronic control board.

Assuming that you do not have a fuel problem, I would do the following, in this order.
  1. Check the load on the Onan by measuring the amps at the main line or main breaker on the breaker panel to ensure that you do not have a load caused by some sort of short or defective device.
  2. Check electrical connections from the PCB to the Governor, Actuator. Unplug the spade connectors and coat them with corrosionX
  3. Check the wiring harness and 3 connections to the PCB, coat these with corrosionX
  4. Check the PCB ground and coat with corrosionX...and check the two or three ground straps on the Onan for continuity and coat with corrosionX
  5. If you still have a problem, it is likely the PCB or the Governor, Actuator. You may want to contact the following Onan dealer:
    Eneq Limited
    49 Geroulanou Street
    17455 Alimos
    Tel: (30) 210 9886621
  6. The Governor, Actuator will be around 250-300 euros,and the PCB will be about 1100 euros. It might be worth it to try a Governor, Actuator because if it solves your problem, you will save time and money.

BeBe 387

On Mon, Oct 31, 2016 at 2:48 AM, pepinoamel <no_reply@...> wrote:

Hi all,

My generator is not running properly for the last few days.  It starts off fine for about 20 minutes and then revolusions go up and down in a wave pattern which gets worse and sounds like it's going to stall but it hasn't stalled yet.  When I turn it off there are no fault messages.  I've changed the primary and the Onan fuel filter and that hasn't fixed the problem.  It doesn't really sound like fuel starvation as the ups and downs are too even for that.

Has anybody got any suggestions what I could look for?  Many thanks.

Gerhard Hoffmann

SM 381 Pepino


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