Onan MDKAL Generator Fuel Solenoid SM2000
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Germain Jean-Pierre
Hello Mike and Jose,
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The PO was wrong. My MDKAL starts immediately without any preheat. Find a Kubota dealer who has a roving mechanic... Good luck Jean-Pierre Germain, Eleuthera, SM007, NZ
On 15/09/2020, at 7:13 AM, Jose Venegas via groups.io <josegvenegas=icloud.com@groups.io> wrote:
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Mike, Is it possible that you are talking about the Onan Governor, Actuator (new part #306−5006−01 old#151-0779-01), which increases rpm under load and shuts off when you press stop? If you are, it is possible that the governor is bad, or the control board is bad. I am not sure how to test other than to attempt to check voltage changes when pressing start or stop. If there are voltage changes the control board (PCB) is probably OK. There may be a fuse on the control board or in-line with the governor if you get no voltage. You should also see if the gov actuator opens up more fuel when load is added...if not, there is a problem with the actuator or PCB. The purpose of the Gov. Actuator is to maintain constant RPM, regardless of the load. This maintains a constant 50htz frequency. I carried a spare but never had to use it. Bill
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Steve Bell s/y Dusk SM378
Hi Mike. Since we purchased Dusk and the the previous owners have had start problems with the genset . They even had parrelled a smaller battery next to the genset which helped but in hindsight was not a good idea as the batteries were not the same.rating and the smaller battery was being overcharged so i was determined to try and resolve the problem. I had the genset serviced and had the fuel.pump negative solenoid terminal block all replaced which seemed.to.fix the problem however within 24hrs i was back to square one. The owner of the company who serviced the genset was extremely embarrassed and personally came out to try and find the problem. 2hrs later the problem seems.to be solved and bolied down to a faulty k3 relay for.the pre heat plugs as we are in the meditterean he said it was not neccassary to pre heat the plugs with he present weather conditions so he removed it and suggested i buy a new one when i got the chance he suggested to try and get a 70amp one as opposed to the present 30amp one For 3.months we have not had a problem starting the genset with the realy removed whilst this may not be your problem it may be worthwhile removing the relay and trying it out. We purchased a new relay for 7 euro regards steve s/y Dusk
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It should be noted that in the Onan instructions and on the remote start
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switch it states 20 seconds in the maximum for the pre-heat. With best regards, Mark Skipper Sailing Vessel - Cream Puff - SM2K - #275 Currently cruising - Tahiti, French Polynesia www.creampuff.us
-----Original Message-----
From: main@AmelYachtOwners.groups.io [mailto:main@AmelYachtOwners.groups.io] On Behalf Of Jose Venegas via groups.io Sent: Monday, September 14, 2020 9:14 AM To: main@amelyachtowners.groups.io Subject: Re: [AmelYachtOwners] Onan MDKAL Generator Fuel Solenoid SM2000 Hi Mike, When I bought the boat the previous owner told me that the generator needed to be preheated for at least 20 seconds. I do that every time and it starts every time. I hope this helps you. Hi Mike, When I bought the boat the previous owner told me that the generator needed to be preheated for at least 20 seconds. I do that every time and it starts every time. I hope this helps you.
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Jose Venegas
Hi Mike,
When I bought the boat the previous owner told me that the generator needed to be preheated for at least 20 seconds. I do that every time and it starts every time. I hope this helps you. Hi Mike, When I bought the boat the previous owner told me that the generator needed to be preheated for at least 20 seconds. I do that every time and it starts every time. I hope this helps you.
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Hello fellow Amelians, Having an issue with the genset on SM2000. After no use for 3 months, it would crank but not start. After 8 sec preheat, pressing START, engine cranks fine, but no ignition. Visual check confirms that the fuel shutoff solenoid is not moving to open position when START is engaged. When manually pushing the solenoid to open valve, starts fine. The valve remained open after release and ran fine for several hours. Normal shutdown. Then, to test, did the same procedure. Would not start until manual push on solenoid, but now does not stay in the open position. This generator has only the cutoff switches for temperature and oil pressure, no gauges. Perhaps someone has a quick explanation for the above from experience.
In the meantime, I am trying to figure out the control diagram to assist in troubleshooting. Here’s my logic so far. The Start/Stop toggle switch functionally cuts off the fuel when pressed to the STOP position. In the START position it must energize the SOLENOID to open the fuel valve. The toggle then “defaults” to a neutral position in the RUN mode, so the SOLENOID must remain energized, but not through the switch or it would be continually energize even when off. Furthermore, to protect the running engine, a fault in either oil pressure or engine temperature must de-energize the SOLENOID to cut off fuel. The pressure and temperature “senders” lead to a “2 pole double throw” switch which I presume has the capacity to de-energize the fuel cutoff solenoid when the “sender information” does not meet spec. What I haven’t been able to ferret out is if there is an interface between the START function and the safety cutoff function. Pressing the START should power the solenoid. Does the safety part of the system need to be “happy” during the start, or is it completely independent and takes over powering the solenoid only AFTER the engine starts? Will continue the research, but would appreciate insight from other and would like to know if my assumptions above may be heading me in the wrong direction. Thanks Mike Ondra Aletes SM#240 Rock Hall, MD
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