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Onan generator won't stay running Richard 11-13-08  
I have an onan generator on my 1990 Bounder motorhome. Generator worked fine in August and a month later generator will run as long as start button is pressed, as soon as you let go of button generator stops running.
I have tried a new fuel filter, changed spark plugs and filled motorhome with fuel and changed oil. Does anyone have any ideas? Thanks. Richard
Re: Onan generator won't stay running Tommy 12-28-09  
I need help troubleshooting.
Re: Onan generator won't stay running j.britton 4-4-10  
Gas microlite stals when start released
Genrator wont stay running aaron smith 6-1-10  
I have a genrator on my rv it wont stay running spray carb cleaner act like it will run but wont any ideals
Re: Onan generator won't stay running leroy gary 10-24-09  
My onan gen4000 runs for about 30 min then shuts down. If I try to restart it right a way it will not but if I wait for about 5 to 10 min it will start and run for a short while. It seems to cut off when it gets hot
Re: Onan generator won't stay running D. L. Carpenter 10-7-09  
My Onan 3600kw LP generator will not stay running and get a fault code of 13. What do I need to do??
Re: Onan generator won't stay running Don Hardee 8-19-09  
My Onan 5.5 kw Onan generator won't stay running. I do have a Hertz / Fq. meter. Generator starts fine, has 63 hertz jumps to 69.5 afer a few seconds the generator truns off. I think my control broad 5374 is bad there are no adjustments on it. The replacement part is $350 is there a way to adjust the rpms, to keep the Fq to 60 Hz wihtout replacing the control broad?
Thank you:
Re: Onan generator won't stay running Derrick Schramm 9-8-09  
Onan 4000, won't stay running. Hard to start.
Re: Onan generator won't stay running john 6-29-10  
I have a onan 6.5 in my r.v. it starts ok but then it cycles...it starts to die then it goes to full chock and revs up again
Re: Onan generator won't stay running Matt 7-7-10  
I have a onan 4bgefa26100f genset that drains the battery down when running. If you disconnect the battery lead the genset shuts off. Can you help Thanks Matt
Re: Onan generator won't stay running Bob 9-16-10  
Onan Deisel 7500 in RV quits running after approx 45 second. Will restart immediately but shut down again. Error code 33. Oil/Filter, Fuel filter changed. appears to have good air flow. Shuts down even with breaker on genset off. There is about 35 hours on the generator. Can you help? Thank you
Re: Onan generator won't stay running Dennis B. 9-16-10  
Check out this free printable trouble shooting guide for Onan generators from flightsystems.com. It helped me learn all about them. They also have great prices on circuit boards and voltage regulators.
http://www.flightsystems.com/pdf/onanrvtshootgd608.pdf
Re: Onan generator won't stay running Dennis Bernhard 8-20-10  
To the ones who are experiencing their generator shutting down once they let go of the start switch. It is probably due to one of three things. The slip rings could need cleaning. Generators should be exercised (run) a minimum of a half hour per month to keep oxidation from forming on the slip rings. Typically many RV generators are not run at all for months. It could be a faulty circuit board, or it could be a faulty voltage regulator. flightsystems.com has a great trouble shooting guide that you can print out to isolate the problem (I just went through all this)They also sell after market boards and controls, but the trouble shooting guide is free. Hope that helps.
Re: Onan generator won't stay running c hunt 7-31-10  
I have a 10.0 HDCAA 10kw it will run about 30 min then shut down. shows overheating. we have checked everything help
Re: Onan generator surges freddie foutch 7-17-10  
My onan will surge and run real rough? It sounds like it is going to stop then it speeds up. What do I do?
Re: Onan generator won't stay running robert 7-23-10  
I have a 4.0 kw oan gen set 1989
fuel pump was not working found no 12 volts going to pump checked supply wire it had with start switch on 6 or less volts what could be the cause?
Re: Onan generator won't stay running gary case 7-29-09  
I shut gen off when I got fuel, when I pulled out I started gen I forgot I had air running it kicked breaker in mh and on gen. now it will start but dies as soon as you let off start switch????? cant get it to stay running it is a onen 6.5
Re: Onan generator won't stay running Pete Martin 7-28-09  
I have an Onan 4000. It would not stay running. I changed the spark plugs and got fresh gas in the tank, still no better. FINALY i took the little white platic altitude adjustment switch off of the needle screw. (It is actualy a cap on the needle screw.) I ran the screw in and out...so as to clear any build up of sediment. Then I backed it completly out. Let the fuel run out for a bit. Put it back. ( to approximatly the same setting that it was previously.) Sarted the gen and run the screw in until it just started to stall. Then backed it out 1/2 turn. Let it warm. UP! It has been running like a champ since!!!
Re: Onan generator won't stay running ron morbeto 6-9-14  
My 5500 onan generater stops after running for 3-4 minutes. It sells hot. after 10-15 minutes I can restart it, with the same results.
Re: Onan generator won't stay running rick michael 3-9-09  
I have a onan generator model #4kyfa26100h and the board i think is bad the board # is 300-4923 is there someway i can bypass the board to make it work? thanks rick
Re: Onan generator won't stay running Roger Murray 1-9-09  
There is a fail safe on the oil pressure switch that shuts down the generator when there is no oil pressure It is over ridden on start up and will allow engine to run as long as the button is on. Check this pressure switch
Re: Onan generator won't stay running Richard 11-25-08  
Thanks for all the help, but still have the same problem. Changed oil again, replaced fuel line and filter, changed plugs, motor home is full of fuel. Not sure of how to check fault codes because the generator does not have any lights on genset board. Checked the overspeed on the carb. Is there anything besides the control panel to buy or is there another part you think I need. Thanks alot.
Richard
Re: Onan generator won't stay running Williams 11-14-08  
Make sure the chip board and everything around it are bolted/screwed down and not loose. This happened with my son's generator and he was telling me he went to take out the chip/computer board and found things were not properly bolted down and had come loose. Include all ignition parts in the inspection.

Other issues can be 1) battery voltage below 9V check batteries and all connections; processor will abort start at less than 6V cranking power 2) disconnect genset control connnector and insure integrity of pins and connection 3)check fuel lines for damage/no cracks allowed

Check fault codes: control switch on the genset will blink if fault shutwown. It will blink 3 or 4 times repeatly. Three blinks is a service fault; press STOP once to cause a two-digit second level fault code to blink; the tow digit code consists of 1, 2, 3 or 4 blinks, a brief pause, and the 1 to 9 blinks; example is fault dode 24 consists of blink-blink...pause...blink-blink-blink-blink. Fault codes stop blink after 5 minutes. To clear codes press stop once for level 1 fault or twice for level 2 code fault. Press stop three times within five seconds to restore blinking.
This came from the service manual'
Once get fault code list on web and ask what that fault code means.
Good luck.
Re: Onan generator won't stay running Herb 11-19-08  
Have your govenor overspeed adjustment checked. I had similiar problem and the Onan technician adjusted the overspeed on the carb - problem solved.
Re: Onan generator won't stay running Charles Perez 4-4-09  
I have a 1989 Bounder with a 6.5 onan generator. It starts but after two to three seconds it stops running. I can start it again but but will stop. I had it checked out and Metro RV stated it needed to be rebuilt but I really don't think it does I don't see any smoke coming out of the exhaust. I live in Santa Ana, ca. Is there a Generator mechanic that can fix my problem.
Re: Onan generator won't stay running Wendy 4-30-09  
We changed plugs, filter, fuel,everything we could, still doesnt want to run!! Model 4kyfa26100h
microlite 4000. Any help for us.
Re: Onan generator won't stay running Doug Young 7-6-09  
This is what the manual say for Code 14:

OVERFREQUENCY FAULTóCODE NO. 14
(Engine governor unable to maintain rated frequency)
Corrective Action: See an authorized Onan dealer.
Re: Onan generator won't stay running Doug Young 7-6-09  
OVERFREQUENCY FAULTóCODE NO. 14
(Engine governor unable to maintain rated frequency)
Corrective Action: See an authorized Onan dealer.
Re: Onan generator won't stay running Barry Hunt 6-25-09  
The Onan Brand Generator is a pretty reliable one, and most problems relate to either setting idle for too long, dirty air/fuel filters, fouled spark plugs, and just plain buying low octane gas. My first experience I assumed that I wasn't getting any spark, so changed the plugs, and replaced the coil. Well, the big buck coil wasn't the problem, the plugs weren't all that bad, and all the wiring, fuzes, and circuit board were perfect, so what now?? We crimped the gas line where it comes into the generator, and disconnected the gas line, and purged the gas line from the main storage tank to the generator for a gallon or two, and the stuff was not only yellow in color, but smelled like turpentine. Even when poured on the ground we tried to ignite it, and it wouldn't. To go with this, we replaced the fuel and air filter, and nothing. We decided to disconnect the inlet line from the fuel filter to the carburator, and use lots of carb cleaner and compressed air which must have dislodged something in the jets, and as to this date, as long as it is run once a month at a minimum, if only for 10 minutes or so, to purge all that stationary gas from the incoming line, charge the auxillary battery, and use of a gas additive to prevent any gas problems associated with sitting during the winter, it still fires first try. Helpful Hint: You buy cheap gas, you get what you paid for. Better gas=less maintenance on your generator, as well as the rig your draggin' it around in!!! 87 octane at a minumum, read your owners manual!!! I wouldn't run 85 in my lawnmower!!! Hope this helps some of you.
Re: Onan generator won't stay running TONY M. 6-20-09  
Experienced many years of working with Onan Generator systems, in the military. Never experienced anything like this "ONAN GENERATOR FROM HELL"! (Model #4.0BF-3CR/16000B)
Recently received an RV that originally came in for not running. Fixed the fuel line, establishing fuel pressure.
Replaced numerous wires, establishing ignition.
replaced (K2 relay & Oil Pressure Switch), establishing ignition.
Now, this antiquated P.O.S. "Starts & Runs", but shuts down as soon as you release the "Start Switch".
Replaced the oil pressure switch, start switch, diode, k2 relay, ohm tested the ignition coil, and numerous wiring connections. Many of the wires were brittle and broke on contact. Still trying to get this generator keep running after the start switch has been released. Thanks

Tony M. "vdolphins@rushmore.com"
Re: Onan generator won't stay running Roger 5-19-09  
Mine has just developed the exact same problem Richard - has anyone come up with a solution yet
thanks Roger
Re: Onan generator won't stay running BOB FORD 6-8-09  
WHAT IS CODE 36 FOR A 2003 ONAN 4KW GENSET? IF IT'S POSSIBLE I WOULD LOVE A COPY OF ONAN CODES!
THAMK YOU
BOB FORD
Re: Onan generator won't stay running gwh 10-20-10  
Will start and run for about 3 minutes. Then dies. Will not restart until it has been about 45 minutes since it ran
Re: Onan generator won't stay running Del 1-21-09  
Many manufactors will install a second 'inline' fuel filter, surprised me once.
Re: Onan generator won't stay running Nate 5-26-14  
Hey everyone. I have an Onan Commercial 4500 (unsure of the model but I think an NHM-series, gasoline).

The generator would die after releasing the start button (ran fine with it depressed).

My local Cummins/Onan dealer replaced the voltage regulator and it appeared to fix the issue. I also had the brushes replaced.

Total out the door cost was north of $900.

About seven months later, it's doing the same thing.

I'm hesitant to drop more money in this old generator when I've already spent half the cost of two Honda EU2000i generators with one repair.
Re:PART REQUEST chris 6-25-12  
I need a sylinoid for my onan 4000 generator for my 1994 flletwood flair.
Anyone know the part number ?
Re: Onan generator won't stay running patti 7-1-12  
Genertor has a new mother board, new carburator, new fuel pump, new spark plugs, has fuel, and spark, and will run and then after a minute quit. A new oil pressure sensor has been installed and still the same thing. HELP!!!!
Re: Onan generator won't stay running Larry 2-7-12  
Same as above. 2.8 KV Onan with only 8 hours on it ran fine, than now runs two seconds after letting up on start switch before shutting down.
Spent $300. at local RV shop to fix but they want more $$$$$ to keep fiddling with it. Will drive 300 miles to San Leandro Onan Shop for fixit and will post the fix. Thanks to all for the helpful posts!
Re: Onan generator won't stay running Richard Baker 12-14-11  
Onan 6.5 generator will not turn over went direct to power source still would not turn over
Re: Onan generator won't stay running john 11-17-11  
2007 Onan,5500, first start up runs for 10 minutes, then quites, I replaced the oil and filter, and oil sencer, still runs and stops, if I unplug the one wire to the sencer it works great, when I plug it back in it quites, any ideas what would be wrong, thanks john
Re: Onan generator won't stay running Larry 12-7-11  
What was the answer for Richards question? I have the same problem
Re: Onan generator won't stay running Jim Marsh 9-23-12  
Our Onan generator 2.8 KVFA26100K Microlite will not stay running after releasing the start switch. As long as you hold it on it will continue to run. Last year it started this and up until then we have had no trouble with it at all. We have a remote switch inside our 5th wheel which I disconnected to see if it had any affect, but it didn't. What could be the cause. Is it the control board problem or is there a relay that can be replaced? We have not wiring diagram or parts book on this. Thank you.
Re: Onan generator won't stay running Guy Wright 7-23-13  
I have a Onan Marquis Gold 5500 in my 2006 RV. This weekend the generator started to act-up. After running for about 45 minutes it shut off and gave a code 36. This is low fuel in tank code. The RV tank is 3/4 full. It does the same driving down the road or setting still and level. What else could be causing the problem?
Re: Onan generator won't stay running charlie 11-5-13  
Onan generator will only stay running if start button is held down if released it shuts off it is propane.
Re: Onan generator won't stay running rob 11-28-10  
What is the solution
Onan 4000 generator Doug 9-12-13  
No start will not crank
-- no light on switch when turned to crank --usually it flashes
--fuel pump will run
Re: Onan generator won't stay running Charlie 9-8-13  
I just bought a 78' jimmy mini. It has a 4000w Onan generator with 107 hours that will run like a top for about 2 minutes and then it will act like it is going to die but never actually does (almost like it is low on fuel), but the RV itself has over half a tank and is sitting on level ground. I have changed fuel filter and it did not fix the problem. ANY SUGGESTIONS! Please....need help!
Re: Onan generator won't stay running Lee Tyrney 8-15-13  
I have a onan 7500. Runs for about 1 minute then shuts off give me 2 blinks which says it is low oil pressure ??? It has the right amount if oil in it. Any help a appreciated. Thanks
Re: Onan generator won't stay running terry 8-22-13  
4000 onan microquite 4kyfa26100k will turn fine, will not run. carb been cleaned, fuel pump fine brushes like new and fine, tried starting out of r v and does same thing. can not keep spending on it. set and not started for a year, my mistake.would have to take apart to check internal parts and can not afford 100.00 an hour labor.there is a g man control that checks circuit board but no one around has one. saw this on internet. any ideas terry
Re: Onan generator won't stay running John 10-20-11  
Onan microlite 2800 runs for 1-2 minutes and stops then will not start, it will start once again after sitting for hours. It has less than 100 hours on it.
I exercised it just about every month for 2 hrs under load.
The gas in the RV is old (14 months, however the rv and genset start right up and the rv runs excellent)
I have fuel to the carb when I pull the hose and turn the genset over, after it stops running.
Thanks
Re: Onan generator won't pick fuel from gas tank. Larry Pipkin 5-31-12  
Hi and thanks for help on this page.

I own a 1992 Bounder with an ONAN 7000 Generator.

It suddenly stopped running and would not start. First indication was that it was not getting fuel. The unit draws it's fuel from the vehicle's primary fuel tank, and the tank must be over 1/4 capacity before it will pick up because of a built in safety. My tank currently is over 1/2 capacity. I checked the fuel pump on the generator and it is working properly. I replaced the fuel filter. The rubber fuel line connected to the metal gas line leading to the gas tank was dry rotted and cracked, but not leaking, and I replaced it anyway. After doing all this, the generator still would not run. I tested the fuel pump again by disconnecting the fuel line from the metal gas line and dropped it down into a can filled with gasoline. The generator granked and run perfectly as long as I left the hose in the can, I suppose meaning it was getting fuel.

Now I am at a loss. Can you please offer any suggestions or advise if there is a separate line going to the gas tank from the generator to draw it fuel from. Or advise how it draws its fuel?

Thanks
Re: some of the electrical outlets dont work and the gtfi breaker wont stay on. im plugged into house current with utility extension cord. the ac and fridge and one outlet work. ac surges a bit. leanna 6-23-11  
Living in a 1985 minniwinnie in friends yard. Only had it for a few months. Hooked electric to the house with utility extension cord and water from a hose. Having trouble with ac surging and only one power outlet inside works. Overhead lights in front work but not in back end of interior. Also the gtfi circuit breaker in the panel with fuses and breakers won't stay pushed in...not the test part but the whole thing. I believe its a converter situation where it charges batteries too. Fridge has option for propane or dc or ac power use. And appears to be running off propane currently but id love to get it on electrical power too. Where do I start? I have a multimeter. Kinda slow on understanding.
Re: Onan generator won't stay running lonnie Osgood 7-12-11  
My LP Onan gen starts but won't stay running it ran fine Memorial Day weekend not here it is June 13 and it won't stay running, any idea what to do its a 3500
Re: Onan generator turns over but wont start donald macaulay 5-23-11  
Hi, I am looking for someone to help me get my onan 4.o kw lpg genset to start on my 1982 fleetwood pace arrow motorhome...It ran out of gas, while running..I filled the tank..Now when trying to start it cranks over well, You smell the gas, But does not start..While trying to start it sometimes it misfires...Can anyone help me please..
Thanks Donald
Re: Onan generator stop running on hills with 3/4 tank. Don 4-24-11  
Is there a way to bypass the gas level sensor?
Re: Onan generator runs ok but does not power up the 120 sockets phill 3-6-11  
I have a onan 7kw generator it runs fine but wont seem to power any thing on the rv ive put a meter on it and it shows 96volts. people have told me that it is the transfer switch not kicking in any advise would help thanks phill
Re: Onan generator won't stay running Tracey 9-21-11  
I have an Onan 6500LP I am getting a code 13. What is the fix?
Re: Onan generator won't stay running Matt 7-15-11  
I have a onan 2007 generator on my camper it will not stay running any idea
Re: Onan generator won't stay running ed 3-8-11  
I have a diesel 7500 Onan generator.
error code 3 1 1. I have tripped the breaker on the generator and it still will not stay running.
Re: Onan generator won't stay running brad schild 7-16-11  
Starts fine and stops as soon as start button is release. where is the oil pressure switch located. Onan BGE generator.
Re: Onan generator won't stay running Chad Heath 9-14-11  
I was having the same trouble with my generator. It would start and run for several minutes and then quit as if someone pressed the stop button. I had to take it into an Onan repair shop. First, they replaced the carburetor, but that didn't do anything. They did a lot of troubleshooting after that and they found (or thought they found) that the brushes we're getting stuck, or pushed in to a degree that they weren't working. They replaced those and the generator ran fine for them for an hour, but when we got it home it would only run for 5 minutes at a time for us. They tried putting on a bunch of different parts and nothing was working, and then something tipped the mechanic off that the voltage regulator might be bad. That was the correct problem. He said that usually a part like that is either going to be good or bad, but ours seemed to be working sporatically, or would work well until it got too hot and then would short out somehow.
I looked on about a dozen different forums for a solution to this problem when we had it and I never really found one, so I thought it would be a good idea to post my experience in case anyone has the same issue. Check the voltage regulator.
My generator is the Onan 4000 watt BGE model. I believe the year is 93.
Re: Onan generator won't stay running Ron 9-12-11  
My dad has a Onan Diesel Generator in a 2003 Fleetwood Expedition. Starts fine and runs exactly 60 seconds and dies. It flashes a code 33. Reading the manual it says it has to do with temperature. The coolent and oil level is good. Any suggestions?
Thanks
Ron
Re: Onan generator won't stay running Chad Heath 9-14-11  
I was having the same trouble with my generator. It would start and run for several minutes and then quit as if someone pressed the stop button. I had to take it into an Onan repair shop. First, they replaced the carburetor, but that didn't do anything. They did a lot of troubleshooting after that and they found (or thought they found) that the brushes we're getting stuck, or pushed in to a degree that they weren't working. They replaced those and the generator ran fine for them for an hour, but when we got it home it would only run for 5 minutes at a time for us. They tried putting on a bunch of different parts and nothing was working, and then something tipped the mechanic off that the voltage regulator might be bad. That was the correct problem. He said that usually a part like that is either going to be good or bad, but ours seemed to be working sporatically, or would work well until it got too hot and then would short out somehow.
I looked on about a dozen different forums for a solution to this problem when we had it and I never really found one, so I thought it would be a good idea to post my experience in case anyone has the same issue. Check the voltage regulator.
My generator is the Onan 4000 watt BGE model. I believe the year is 93.
Re: Onan generator won't stay running Gary Andre 8-14-11  
My generator runs great when holding start switch, have changed the control board still doing the same thing any ideas? thanks Gary
Re: Onan generator won't stay running hans rueckert 7-20-11  
I have a1995 onan generator #4kyfa that runs for @10-15 minutes than shuts off and
will not starts again.10 minutes later will start again,but only for a little while.
What might bee the problem?
Re: Onan generator won't stay running jeffery dunn 9-10-11  
Onan 4000 in a ultra supreme motor home arn out of gas.now it will crank but idles high and low. sometime it will shut off. also when the ac unit is turned on it pulsates with the generator speed.
Re: Onan generator won't stay running JACK MARNEY 3-19-10  
REPLACE THE CARBURATOR IT IS A COMMON PROBLEM THEY BUILD UP VARNISH FROM SITTING I AM AN RV TECH
Re: Onan generator won't stay running code 37 sheryl 6-22-10  
Generator starts runs for a while then starts running rough and shuts down. Have to wait about 5 minute to start again and it shuts down again Code 37 came up. What does that mean?
Re: Onan generator won't stay running Rit 7-13-10  
Dear Sir: I have an Onan 4000 quiet
It is hard to start
Once started white smoke comes out
When I put a load on IE: Air Cond.
The Onan stalls out. Any advice would be appreciated. Rit

P.S. Onan has 600 hours on it
Re: Onan generator won't stay running Mike 7-9-10  
Onan code 13
Re: Onan generator won't stay running guillermo 3-14-11  
I HAVE 2007 BOUNDER 5500RV GENERATOR WILL NOT STAY OPERATING CHANGE OIL AND OIL FILTER ADDED NEW OIL AND CHECK OIL LEVEL AND IT LOOK LIKE WATERY BROWN WHAT IS WRONG?
Re: Onan generator won't stay running Yogi 9-9-10  
Hi All,
We have a 2002 RV with an Onan 50 amp...It has been nothing but TROUBLE,RV only has 28,000 miles...first it would bog down and somtimes die....next it would not crank unless you tapped on the top of the unit with a hammer...NOW it wont run unless you hold down the start button...BUT hell I can get it worked on at Cummins for 101.0 per hour...what a PIECE of equipment!!!
Re: Onan generator won't stay running David Magruder 7-3-09  
Bob, did you ever get the codes?? My 4KW won't start unless I manually choke it, (close butterfly) then it runs, but surges for a while and stops. Trouble code is 14?? Where do we find the code identifiers? HELP!!
Re: Onan generator won't stay running bob 2-4-12  
Onan gen set has fault code14 what can be done to fix with out going to dealer?
Re: Onan generator won't stay running charles m 10-16-09  
My onan 6.5 was running and I had both a/c on and then it quit. I have for sure 7/8 tank of gas. it will run with the start switch push in but stop as soon as the switch is releasd. need help. thanks
Re: Onan generator choke problems Amy Bodnar 8-2-12  
Setting the choke?
Re: Onan generator won't stay running Colton 8-20-12  
The generator will not stay running, it surges and we are getting a code of 25 and a vdc code
Re: Onan generator won't stay running joan 8-6-12  
My onan lp generator model 3.6KYFA26120K runs for 2 - 3 hours (supporting one roof top ac unit) then quits. No error codes. Am connected to a 100 gallon LP tank. The genset will quit immediately after the AC unit reached desired room temp and turns off

vtxg9
Re: Onan generator won't stay running Dave Mikulyuk 3-20-13  
Have an Onan Cummins 4MKYFA98818K generator serial number CO90236434 on a houseboat at Lake Powell Utah. Generator runs fine when there is a decent load on it.....a few to 30 seconds after you take the load off the engine speeds up slightly then shuts down. Haven't been to the lake to check out the fault codes it's throwing yet,. This weekend. Any ideas where to start looking? Thanks
Re: Onan generator won't stay running gary 10-6-11  
I have a4000onan micro quite I stqrted it before i left home and it ran ok. when i got to where i was going it wont run it would start and run a few seconds and die. I just put a new line switch in. I cant get it to stay running and it is not charging with a full load
Re: Onan generator won't stay running Marty Rohlfs 2-18-13  
I have a Onan 5.5HGJAB-901A, Ser # EO10235819, SPEC A. It will start but after runnining for a short while, it stops, and I am getting a 14 CODE. Is there something that I can check without going to ONAN?
Thanks,
Re: Onan generator won't stay running mike 9-23-10  
As soon as you release the start button,generator dies.hold it and runs great.
Re: Onan generator won't stay running Al E 6-19-12  
Onan 4000 shuts down when it gets hot what can i do thanks ( Al )
Re: Onan generator won't stay running wayne 12-14-09  
My oil pressure switch was bad
Re: Onan generator won't stay running David Fulcher 4-24-14  
Onan 4k generator will start and run avout 20 min then cuts off. Will start back up run for about 5 min. Then won't start at all untill it sets about 1-2 hours.
Re: Onan generator won't stay running HENRY MALDINI 7-25-12  
MY ONAN GENERATOR START AND RUNS FOR ABOUT 7 MINUTES AND SHOTS OFF WITH LOAD OR NO LOAD, AFTER A FEW MINUTES START RIGHT A WAY???
Re: Onan generator won't stay running Willy 12-26-12  
I have a 12ghab-101 12kw generator 2002? with 70 hrs on the meter and it faults out within 10 sec. with code 14- over frequency. Changed the actuator controller. Same problem. Checked the whole ignition system seems ok. Thanks for the help
Willy
Re: Onan generator won't stay running Tom Dennis 4-19-10  
I have a RS 12000 standby Onan Generator. The battery keeps running down even tho we run the generator every 10 days for about 20 mins. brought two new battery in last 8 months, changed spark plug and check oil. nothing seems to help. would not start today had 3 flashs. any help would be appreciated.
Re: Onan generator won't stay running Frank Stewert 2-21-13  
I had a similar issue with my generator. It would run for 5 - 10 minutes then shut off. Let it set a bit and it would start up and then quit. Tried to gravity feed gas to it and it ran fine. Pushing the prime switch indicated that it sometimes didn't always work. There is a small fuel pump (7 p.s.i) that the filter attaches to. It should run all the time when working correctly. Mine sits under the control board and wasn't difficult to replace. I also replaced the fuel and air filter while I had the opportunity. The parts cost me about $100 and took about 1 hour to switch out. The pump was intermittent and replacing it solved my problem.
How to remove spark plugs in rv generator wayne feiling 9-25-12  
How to remove spark plugs from onan rv generator
Lord problem ibrahim po 4-1-13  
In mdkaa 11.5 generator if started the rpm is going on but if lord give rpm is ok why this heppan
Re: Onan generator won't stay running Denney 4-8-13  
I have a Onan ML 2800, It will run for a few minutes then loose fire at the plug and voltage at the fuel pump. I have tested the magneto, voltage output and flash field with all being good. If I tap the control panal the plug will start firing again for a few minutes of run time, then shut back down with no fire....does anyone know where to find a control panal or have any ideas ? Thanks
Onan generator won't idle down Walt 2-3-14  
Onan generator model 4bgefa26100f only runs at full throttle, tried putting load on it and it trips the breaker. Keeps on running afraid it will blow apart.
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Re: Onan generator won't stay running Rob 5-29-13  
I have a Onan 10 HDCAA spec A that hasa surge issue, I have checked all the fuel line pressuer and return and there are no leaks. I checked the resistance of the Governor and it reads 3.3 to 3.8. The book shows it should read 2.3 to 2.8 ohms. Can 1 ohm cause a 30 cycle surge? Or do I need to adjust the High idle speed? There are no codes set.
Re: Onan generator won't stay running Kim Nack 6-29-14  
Choke keeps onan 4000 2006 from starting when hot. It stops after running a while then floods during restart. Do not know why it stops in first place.
Re: Onan generator won't stay running lester 10-10-10  
Is it hard to change out the carburator
Re: Onan generator won't stay running lester 10-10-10  
How hard is it to change the carburator
Re: Onan generator won't stay running Joe Faul 12-21-11  
Gen runs with start switch engaged but quits when released; good stream of gas with fuel line disconnected from carb; removed plug from engine; plug fires thru spark gap! How can I check solenoid on carb? model #4kyfa2600e
Re: Onan generator won't stay running Dennis 5-4-10  
Recently purchased a 1988 Pace Arrow RV. Replaced the starter and the control board. The 6.5NHE Onan dies as soon as you let off of the start switch. Brushes and Slip rings are clean. Produces 0 AC volts. Holding the switch it runs great. HELP ME PLEASE IT'S RV SEASON. Thanks Dennis
Re: Onan generator won't stay running Walt Landon 2-2-11  
What did you do with the old control board? would you like to sell it?
Re: Onan generator won't stay running Rob 7-21-10  
My onan generator won't stay running unless I keep the start switch depressed. Any Ideas ?
Re: genrator wont stay running pat timm 9-11-13  
My 2.8 in 1990 toymini rv starts okay, runs 90 seconds, then shuts down. it will restart but stops quickly after it starts. i changed the fuel filter, no change. seeems to be a fuel problem? next day will run again 90 seconds. after that willl not stay running.
Re: Onan generator won't stay running code 37 Tiffany 9-9-10  
What does code 37 mean and how do you fix it?
Re: Onan generator wont turn over no status light on switch Tom ruggiero 8-20-13  
Wont turn over no status light on switch ack's like no power
Re: Onan generator won't stay running Aaron 7-6-11  
I have a 1994 Onan 6.5 Diesel genset, that won't run unless you hold the starter switch or the throttle linkage open.
Re: Onan generator won't stay running code 27 Raef 11-12-13  
Onan microquiet 4000 fault code error 27 problem. What is is and can I reset it or do I need to replace something?
Re: Onan generator won't stay running Joe Richey 2-29-12  
Onan Deisel 7500 in RV quits running after approx 45 second. Will restart immediately but shut down again. Error code 27. Oil/Filter, Fuel filter changed. appears to have good air flow. There is about 500+ hours on the generator. Can you help? Thank you.
n8q4z
Re: Onan generator won't stay running richard 11-4-10  
I don't know if this will help all of you but disconnect the red wire from the fuel pump get a piece of wire about six inches long push it into the fuel pump red wire and touch it to red battery wire on starter solenoid, you should here the pump turn on if you do then push start button and see if engine stays running, if it does then your control board is bad, $129.00 at flightsystems.com you CAN VERIFY THAT BY CHECKING THE WIRE THAT PLUGGED INTO THE FUEL PUMP WHILE ENGINE IS RUNNING IT SHOULD HAVE 10 TO 12 VOLTS DC
Re: Onan generator won't stay running Brian 5-14-13  
I have a 1985 southwind class A w/ Owen 4.0 RV Genset. Generator starts and runs for different lengths of time.. Some times 5 mins., 18 mins., 30 mins., once it stops it won't restart. Sometimes when your starting it just cranks and never really starts.. You hold the start button on either location and it acts like once it does start you hit the stop button. It's a hit and miss if its going to run or not and for how long will it run for. I am mechanically inclined on working on stuff, so any help would be greatly be appreciated.
Re: Onan generator runs ok but does not power up the 120 sockets shawn wisk 7-2-11  
My generator won't power up my outlets in my rv.
Re: Onan generator won't stay running greg 7-5-11  
Gen run for 15 min and stop won't start again, wait 15 to 30 mins it start,some time it start by holding choke close. Spend $500 already on mew carb. sometime it will run for hours no problem and some time old habit come back. New oil, plugs, airfilter. How do i adjust choke
Re: some of the electrical outlets dont work and the gtfi breaker wont stay on. im plugged into house current with utility extension cord. the ac and fridge and one outlet work. ac surges a bit. Rich 7-24-11  
First! Be absolutely sure incomming power from the source you are connecting to is intact. Most problems are from a jury rigged connection from the house to the motorhome. The problem you describe is sounding like a loose neutral connection (White wire).
Re: Onan generator won't stay running Angie 7-24-11  
I have an onan generator in my 1997 pace arrow. It will run for about 10-15 minutes and then shuts down and I have to wait before it will start again. Any ideas on what to check?
Re: Onan generator won't stay running Jose Soto 9-4-13  
I have the same problem. Gen will start and run for about 20 min. with out load. Placed minimum load and circuit breaker will kick off. Also the
gen will quit soon after that.
Re: Onan generator won't stay running Erik 7-24-11  
I have an ONAN emerald plus mark 3. Won't run without the start switch pressed inside the RV. Won't even begin to start when using the start switch on the gen. A couple of days ago,started up fine. After a couple of minutes,started one A/C unit. Then I started the other. Thats when it cut out. It has'nt started without the starter switch since then.
Re: Onan generator won't stay running Ben Taravella 9-9-11  
My '92 Flair has an ONAN 4000 Gen set and I was able to keep it working by running it 1/2 hour or so every month. Now it is acting up again by not running as so as I let go of the start button. In the past it usually came down to a lose connection or low voltage in the battery, I changed the connection terminals etc with the 12 V coach Battery it is connected to, I know the other battery is bad that starts the coach and I wonder if this also can have something to do with the Generator. I hate to spend money on bring this in to a pro as the coach is not really worth much any more, we just keep it around for earthquakes and power outs like we had here in San Diego yesterday,. Is the engine start battery associated at all with the starter for the genset?
Thanks,
Ben
Re: Onan generator won't stay running joe 9-22-13  
Please send info on how you fixed the problem.
Re: Onan generator won't stay running JAN LUNN 12-7-11  
As long as I hold the start button in the coach, the generator stays on, but the minute I let go of button the generator stops?
Re: Onan generator won't stay running Jim 8-10-12  
Won't run in hot weather, can it be a vapor lock?
Re: Onan generator won't stay running Jim 8-10-12  
Code 36, unit will run for hours, but when the temp out side hits 98 unit shuts down. Have 100 gal of fuel
All air vents clean, it just acts like a vapor lock.
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