Onan rv generator hidden defect, runs fine/stops
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- เผยแพร่เมื่อ 14 มี.ค. 2018
- Onan cummins microquiet generator has a hidden defective part. If your onan generator runs fine then stops, this is likely the free simple fix. It's incredible how the fix is this simple.
Link to my issues and solution on my first video about the onan, you should watch. • Onan 4000 generator fi... - ยานยนต์และพาหนะ
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I'm wishing Onan paid you for discovering and fixing this issue. This is a valuable video for all Onan owner operators
This is an absolute mess regarding these generators and there should be a class action lawsuit against Cummins for pushing these onto the public. These machines cause people to waste time and money and the manufacturer should be held accountable for this.
Well, apparently Cummins Onan and this dealers are still completely unaware some 5 years later! We have a brand new generator (2023) that has the same dipstick and thrown fault code 36. I just checked the oil level and sure enough it's showing full. Thanks for the video!
God bless you brother. From a 67 year old fleet mechanic that has been in the business beginning in 1977 .Sometimes you discover something like this and it can save a ton of heart acke and money. I am working on basically the same gen with this issue but had oil leaking and worn out belt ,tensioner cracked belt drive coupler ect .I scince youtube has so much valuable information research most repair jobs that I have not done numerous times for just such information that in so valuable. Thank you for this information as the intermittent cut offs was the straw that broke the camels back with the customer wanting a 1000 hour service done. I feel I would have had a comeback without this video..even if just because I filled it up to the perceived proper level.
@@charlessmoak your welcome
So after changing the oil & filter in my Onan RV QG 5500 EVAP Generator, I put in exactly 1.6 qts to obtain your recommended mark on the oil dipstick. Just in case anyone was curious how much to actually add vs the original amount of 2.0 quarts listed in the manual. Hope this helps as well! Thank you for the great heads up!! You saved me a lot of $ taking mine to the dealer as well. You should make & patent a new dipstick!
OMG after 14 Years my generator start working as supposed to be. He never worked good , very often unexpected shutted down. He has only 125 hours terrible work. I bought Honda gen and used long time.
Couple of days ago I've come across this video, o boy, today changed oil , filed up to minimum level mark. Magic, first 2 hours non stop running !!!! Thank you. My 100 times "Likes !!!
Just extra info: My Gen Onan 2500LP 2004Year
wonderful to hear that it's running. 👏👏
Yep that was the problem! The "generator specialist" at our rv dealer rebuilt our generator, then returned it to us with overfilled oil. We were steaming mad, found this video, returned to the "generator specialist" this morning and explained what he did wrong. Thank you so much for sharing your knowledge.
gotta love the crazy cost they charge and then mess it up...lol.
This saved my life! We were boon docking at a racetrack. My gen would run for awhile and then surge and eventually choke and cut off. Took the old out and it ran all day and light for us. Thanks!!!
Thank you, thank you thank you For three years have nothing but problems Until drained oil. Even the trained Onan tech could never keep it running. Unbelievable fix Many miles and money SAVED. Thank you one more time. Will return to the begining of video to watch all the ad. WOW.
your very welcome and thank you for your comment. journey well my friend
Just an update man. I relocated my pump, I’m running it now. I’ll let you know how it ends and maybe even post a video on what I did. Thanks again man.
I have the same generator in my 2018 Winnebago. I can say the gentleman is correct in his statements. The fill line is incorrectly marked too high on the dipstick. For me, it was approximately 6 ounces high. I removed the excess oil and my generator ran fine and stopped killing after 15 to 20 mins! Thanks for the video!
Thanks Dave! This tip fixed my Onan Emerald Plus 5000. Saved me $$$$. Generator had gotten worse as time went on & wouldn't run more than 5 minutes. Oil level was almost to top of dipstick when I changed the oil. I refilled to just above the add mark and no more stalling generator! Just finished running for an hour with both AC's on. Great video!
very nice, great to hear that. jouney well
Appreciate the video. Just a note though. Have been at two rallys now (Winnebago GNR was one) where Cummins speakers have said during generator maintenance seminars: Screw in the dipstick to check oil level on the larger generators. Do Not screw in the dipstick to check oil on the smallest generators like the one I have (2.8L Gas). Odd, since not screwing it in would lead one to add more oil and make the overfill problem even worse on those smaller generators. Also odd since my manual says to screw it in! Just passing what I've been told by Cummins reps several times now. I just depend on the spec in the manual (.6 L or 20.3 oz). I do my own oil change. Check the oil when done - it's right at the Full mark with it not screwed in. At 140 hours since the last oil change now, it's running great and still very close to the same level.
Thank you !! I changed oil and had the start run stop problem. Siphoned a bit of oil out and it’s running great now. You saved me a lot of unnecessary headaches.
thank you for your comment
I feel like I need to send you a check! It’s running like a champ now!! I went to get it serviced yesterday and they quoted me $2180.00 for repair! That wasn’t happening!! Thanks again!!!
thank you for your comment and it's amazing how much people saved, the fix, crazy simple , yet dealers take people for 1,2,3,4 grand.
Thanks, you fixed my problem. When I changed the oil I filled to the full mark and it shut down. Got back from trip and removed to just above the low mark and BINGO it runs. Thanks Again
This is helpful. I had the start/stop issue too. The error code of 2 flashing lights on the start button meant a low oil issue. I had to search that out on line.
The dipstick as you describe, does have a treaded area that does seem deceptive as you mention. I added oil and kept checking the dipstick by “fully screwing it in” instead of the simple ”put it in and pull it out” to read the level. I found that screwing it in completely gave me a proper reading, BUT, note that as you add oil, a little at a time, that the oil settles down into the generator oil pan very slowly, as it seems to look like it has more oil than it actually has in the pan, so after several additions of oil and watching it drain down and repeatedly checking it by screwing in the dipstick and rereading the level, I was able to correctly fill the unit to the REAL Full level. It took several minutes to get it right, so be patient.
Again, your video was helpful. Thanks!
thanks for your comment 👍
Just want to Thank you for this informative finding.
My experience was not quite the same symptoms but ended up being the same cause due to oil quantity.
Initially my gen did not want to start. Cranks over but won't run. I attribute this to 2 months of inactivity. I could get it to run using the choke. So my trouble shooting led me down the path of varnish from stale gas.
I removed the carb bowl and the gen ran for 20 minutes but with hesitation here and ther. Restart and it ran for a couple minutes. Removed the carb, cleaned and reinstalled. The gen ran even longer but then dies. I even added Sea Foam to clean the varnish still runs then dies.
Bypassed the main gas line and installed a clear filter to see what's going on and used a 1 gallon gas tank with Sea Foam still same issues.
Now the costly part, replaced the fuel filter, fuel pump, carb, air cleaner and sparkplug. Same thing ran for 20 minutes fluctuating/storing here and there and dies.
This brings me to this video and the authors other videos ... now remember my gen ran prior to this issue and on numerous road trips other than it sat without exercising for 2 months.
Its winter so that might be another attribute.
Now I did not follow the author's advise on the oil level using the dipstick since this is not a quantitative measurement. I used a measuring cup and added 1.6 quarts of T6 synthetic oil.
I am proud to say that my gen has been running for over 4 hours under load.
Thanks to you friend for sharing .... I added my experience so others can compare my symptoms to theirs.
4000 Onan, Adding my field notes for reference.
Well I am back at it, generator will only run for 20 minutes ... puzzle I am ... determined to find the cause of the issue(s).
On a quick note, My oil level after adding 1.6 quarts and letting the oil settle it's at the 3/4 mark on the hash lines with the oil cap fully closed. This is my 1.6 quart mark that I used for reference. Hence, as the generator runs it burns oil thus the oil level will change but I know where 1.6 quarts of oil level will be on the dip stick at settled. Thus I can add oil as needed. This is my quantitative measurement ... it's a known value.
I am still looking for the cause of the shut down. Posted below are informative info that I am posting to add to this channel. My current Error Fault Code 1st level is 3, and my 2nd level is 38. So it's not my low oil level but a Field Overload (OverVoltage) issue ..... more to come as I troubleshoot this generator.
Check the 1st Level Error Fault Codes:
1) Wake the control by pressing and HOLDING the Stop/Prime button for 3-4 seconds then release.
2) Press the Stop/Prime button 3 times.
3) Note the red flashing blinking light.
4) 1 Blink = shut down high engine temp, 2 Blinks = low oil pressure fault, 3 Blinks = Service Fault, 4 Blinks = cranking engine over 30 seconds.
5) 2nd Level Error Codes checked by pressing the Stop/Prime button one time after checking the 1st Level Error Fault Codes.
6) 1, 2, 3, 4, or 5 blinks, a short pause, then 1 to 9 blinks. (2 digit error code).
1 2 = Overvoltage
1 3 = Undervoltage
1 4 = Overfrequency
1 5 = Underfrequency
2 7 = Voltage Sense Lost
2 9 High Battery Voltage
3 2 = Low Cranking Speed Sense
3 3 = Fault Code (????)
3 5 = Control Card Failure
3 6 = Genset Stopped w/out Fault Condition
3 8 = Field Overload (OverVoltage)
4 1 = Generator Rotor Fault
4 2 = Processor Fault
4 3 = Processor Fault
4 5 = Speed Sense Fault
4 8 = Field Sense Fault
5 1 = Processor Failure
5 years dealing with this. bought a back up generator for when it stopped out in the woods. SO FRUSTRATING!!!! thanks so much
glad it helped you 2
I changed the oil today on an Onan RV GQ 4000, filling the oil to full and had this exact problem. I took a turkey basting tool to suck the extra oil out. It took four loads to bring it down to the half-way point on the yellow tip stick, which is where the oil level was when I started the oil change. Now it runs fine. Thank you for the helpful and pointed video.
journey well my friend
Thank you so much Sir.
I’ve tuned generator up, changed oil & filter, air filter and spark plugs. It’s been running for 2 hrs now. Onan 5500 gas in a 2014 KZ toy hauler. It was random of how long it would run. Maybe 1 min. Maybe 20 mins. You fixed it 👏🏻👏🏻👏🏻
Great video... I have the 4000 Onan and it had the oil changed and new plug. Mine starts and runs fine. I'm having another issue with it not connecting to the power controller but when I was trouble shooting I noticed the oil was right where you said it should be. I didn't add anymore oil (I was temped) and moved on with my trouble shooting. Glad the mechanic who did the maintenance must have known about this issue. Glad I ran across this video... Thanks
thank you nice lady for your comment
I saw your other video dated July 12, 2017 before seeing this one. And fortunately it was one of the first videos I saw when trying to figure out my problem. I want to thank you very much as I was having this problem with my generator of shutting off after about 10-15 min running. I don't normally use it but run it regularly just to maintain it. The last several times it was shutting off after only 15 min. I saw your video and decided to try it. Low and behold it ran for an hour with no problem. So it seems this solved the problem. Now I can cancel the appointment I had to take it in to the local truck repair shop to figure it out. I"m guessing it would've also cost me hundreds of dollars for these "pros" to figure it out. I have a regular Onan 4000 generator in my RV so I don't think it's microquiet one you speak of but your technique worked. Thanks again!!
thrilled for you, it has worked for many. journey well my friend
THANK YOU!!!! Couldn't figure it out till I seen this video. . I purchased my 2007 Keystone 3110TT Toy Hauler in November 2020. Now it's Spring 2021 and I am going through everything. I decided to change the oil ony Onan Marquis Gold 5500 before starting it because it sat for years b4 I bought it. After changing the oil and filling it to the full mark I proceeded to start it. She ran for about 2 minutes and sputtered out. I thought maybe bad gas on float bowl or plugged filter somewhere 🤔. Then I came across this video, drained what appears to be 1/2 quart dropping the level to the add line and started it. SHE RAN PERFECTLY FOR 30 MINUTES!!!
Thank you so much for sharing this important tip! BillyRay, Spokane Valley ,Wa
journey well my friend, glad it helped
one more thing, clean your air filter too! if you put the oil where it is supposed to be, the oil starts to come out of the air filter (crank case vent). SO, when it gets hot the oil expands and caused the filter to fill up with oil causing it to suffocate the generator and die. this is where the issue is coming from. after tearing it apart, I figured it out with the help of your videos. thanks again.
Thanks for this! I was wondering why I was getting an oily-like substance out of the bottom of the air-filter box.
I had the same problem with my generator. I ran it last Christmas night (doing the Cousin Eddie thing) at my brother's house. It was around 10 deg. so the generator ran fine all night long. But when I ran it several times since (in warmer weather) to keep things fresh, it cut out after less than 5 minutes. This weekend, I drained about a pint of oil from it and ran it for a good 10 minutes without a problem. Great advise!
If u suddenly have a int too much oil, then smell oil to check for gasoline fumes? Carb flooding or choke stuck closed?
Thanks for the heads up, you just saved me a lot of work & frustration! After changing my oil yesterday I started experiencing this exact problem, prior to changing my oil the level was about 1/4 inch above the add line; when I changed the oil of course I filled it up to the full mark, and then it started dying on me the next day. I drained a little oil out to get it down to 1/4 inch over the ad mark, problem solved!
journey well friends
After diagnosing a failed voltage regulator, cleaning the slip rings, and checking the low oil pressure switch, my friends 6.5 kW onan was running fine for about 2 weeks. On a hot summer day, it started surging and shut down. The next day, same thing. I remembered seeing this video when working on the voltage regulator and decided to remove some oil from the generator. Sure enough, it started and ran for 6 hours that day and 8 hours the next day. We ended up doing an oil and filter change adding the recommended amount of oil and noting that the level was low on the dipstick. He now runs from halfway up the dipstick for full, to barely on the dipstick for add like you show. He put in Royal Purple 30W oil because it is low foaming and I've had great results with it cleaning up car engines when used there. Thanks for the great advice!
good deal, glad it worked out
Thanks for the video. I was having the same unexplained stop issue on my QG5500. From the day the generator was first run, at zero hours. Had an Onan Tech come out at 50 hours and take a look at it. No problems found. Nothing changed or fixed, because there was nothing broken.
I now have 186 hours on the gen set and continued to have the unexplained stops.
NO MORE. Watched your video and a couple of others with similar comments, drained 3/4 of a pint of oil, dipstick showing just below half. NO PROBLEMS....
Last night had dinner with a friend who is the General Manager for a local RV dealer. Mentioned the problem to him and it was, ho-hum, we know about it. We short fill the generators when they go out or we change the oil. He said, with the oil at the full mark the engine builds excessive crankcase pressure and it shuts down the generator.
Surely Cummings knows about this issue. Why haven’t they redesigned the dipstick? That’s got to be a cheap fix.
there lazy, simple lazy. hundreds of viewers have commented on this fix and saved money. blows my mind to. glad your running again
If the dealer and his technicians know the issue and they send units out to the field 3/4 of a pint short, Cummings must know the issue. Blows my mind they haven’t done a darn thing about it. It certainly lowers my opinion of Cummings Onan..
BTW my error code on the shutdowns was always 36. Which is basically, Hey, we shut the generator down, but we don’t know why, call us, so we can change lots of parts and charge you lots of money....
I've heard several error codes from people to, all leads back to oil in the end, that's truly weird, you would think a single code. also you are EXTREMELY lucky to have a dealer who knows what to do. if you read comments, most dont, they toss a load of parts and hundreds of dollars at them.
vegasdavetv UPDATE...We left South Texas, headed for AZ, with a weeklong stay in Albuquerque. After I drained 1-1/2 cups of oil, 3/4 of a pint, of oil, the gen set ran as it was supposed to for over a week of boondocking. I was scared to drain more. Dipstick was just below half.
Yesterday we got to Phoenix, temperature 102. We planned on boondocking one night, before taking in the rig for some warranty work. Shortly after we parked, the gen set incurred two unexplained shut downs. Without hesitation, the wife said, drain some more oil....
So I drained and additional 1/4 of a cup. The generator cabinet was hotter than I have ever felt. Now I’m at 7/8 of a pint drained, Oil level on the dipstick is 1/4” above the add mark.
Like Magic, the generator ran all night, flawlessly.
BTW, I’m running 5W40 Mobil 1 motor oil in the generator.
Thanks for posting the video, saved me a lot of time and money. First off I was aware that too much oil can be a problem as I had a problem with my home generator which the previous owner had put too much in it which caused it to run for 30 mins and the.shutdown. I picked up a used motorhome a few days ago which I was told by the seller it had an issue running more than 30 mins. I already suspected either to much or to little oil. Last night I checked the oil level to find that it was way past the max and when I had tried to start it the day I picked it up it didn't run. I drained off the oil to the max on the dipstick and then tried to start and it did for a few seconds and then died which is how I found this video. I drained off more oil and started it again and this time is ran for around 40 mins without any problems. It was getting dark so I will run it at the weekend and see hows it goes. Hopefully I can strike this one off my list as done. Thanks for the info about the dipstick marking are wrong.
thanks for your comment on this
I am soooooo happy this fixed my issues... been a problem for a few years
.. now it runs all day .
I'm so glad for you, very nice
Thank you!!!! I have had three of these generators now, first one needed a new diaphragm for the regulator, second needed a new start switch and the third......ran fine when I bought it then stopped. It would die as soon as I let off the start switch. I tookl fill cap off and oil was literally backflowing out of generator. Removed oil to first thread and fired up no problem. Thanks again.
your welcome
I wanted to give you a shout out. This resolved my 15-20 min run time issue.
Amazing fix! great work. Many thanks for this information. There may well be other brand generators out there doing the same thing.
Unbelievable! My three year old Onan QG 4000 generator was running for a few minutes and then stopping. I was so frustrated that I may have to take it to a dealer to troubleshoot and fix. It had been running great for the past year and all of a sudden, it starts, runs a few minutes, then stops. I found this video when searching online for a fix. I was amazed at the video and though - could this be true? So, my oil level was at or just above the top (full) line. It had been changed at the dealer. I used a syringe and removed oil so that it was just above the bottom (add) line. On the second crank it fired up and ran for an hour with no problems! It purrs like a kitten. I still can't believe it. Thank you so much for posting this video. It has saved me a lot of frustration and money.
you are very welcome
@@vegasdavetv we have a RV generator that just clicks when you push the start button. Will not even try to start. We just bought RV off some friends. Had been running fine for us for the first five days. The steps wont retract in either all of a sudden. Could this all be tied together as one problem or just a coincidence? Thanks for you videos! Very helpful!
sounds like your batteries dont have enough juice to crank it over fully, battery can appear to work, lights,radio,tv works, but dont have enough juice for starter. test your battery. or put your car battery in long enough to try and start it.
My guess would be that it was meant to be screwed all the way in and then unscrewed all the way out, take dip stick out and then check oil for it to properly be within guidelines, if you are just dipping stick in as far as it will go without screwing it in then you are going to overfill that way
Remember we are you Tube let's keep it up!
I have been looking for repairs for this exact issue. I have just done as you have suggested on my 2010 Keystone Raptor. I hope this works. I am glad the internet can be used for good, too. Thank you for the discovery of the information and for sharing the same.
So we have a 2017 Micro quiet 4K And it was on the full side off the dip stick. We did exactly what you said and now we do not have any issues with that just shutting off. Thank you greatly for making this video.
your welcome, journey well
This happened to me over the weekend. Luckily we figured it out. When we got home i looked into it and sure enough we were right. Make sure your trailer is level side to side. Took us a long time to find a camp spot so when we found one we were done. We got the trailer level front to back but was slightly off side to side. This generator has never had a single problem prior. We knew it had and was getting fuel, spark, air. So we knew it was intentionally shutting itself off. Changed the oil level and ran perfect the rest of the weekend.
Thanks for solving the problem the Cummings Onan helpline and my trusted mechanics could not solve! Your video was spot on to save lots of $ on our 2013 Onan 3600 on our Winnebago View. I owe you dinner! Will follow your Utube posts from now on.
much appreciated and so glad it helped you. 👍👍
Thank you!!!!! I've been pulling my hair out trying to figure out what in the world is going on oil level is very deceptive it often looks like it needs some added but I was just making the problem worse I removed some oil today and ran the generator for two hours straight ran perfectly. Thanks again!
journey well my friend
Really appreciate this.. I bought this rv and the onan 5500 generator was doing the same thing, ran doggy when I got it home changed fuel filter and cleaned carb.. ran like a champ 15 minutes later dead.. 20 minutes later it starts.. I took a little oil at a time sure enough when I got to the level hes saying its ran for hours.... thank you
your very welcome
Amazing...this fix worked like a charm. I can't find the link to the video mentioned. Onan really needs to fix this or change their manual to tell you not to fill the oil to the full mark.
yes its amazing, still amazing to me
Amazing! So, so happy and lucky that I came across your video when searching. No telling how much money you saved us, THANKS!
have a great day
OMG....I've been trying to diagnose my generator starting and then shutting off 2 seconds later for a LONG time. I just watched this video and as soon as I hit the send button I'm driving to my RV in storage and draining some of my oil which is in fact at the top level.......If this works, you are officially a genius worthy of high praise...I'll let you know asap.....so excited! Fingers crossed.
good luck
Well I went and drain some oil but that failed to do the trick.my symptoms are a little bit different than described by others in that after it starts it stops running about about two seconds later. Any ideas where I should go from here?
Omg we just bought a motorhome. The generator ran fine when we looked at the unit. But that was only about 30 minutes. Get it home and it does exactly what you are saying. Runs smooth and quiet then shuts off. I was thinking a low oil alert. So I check the dipstick and it was to the full line maybe just past. Can't wait to get home and try this. Thank you for sharing!
thank you
So what happened.
Made the adjustment to my oil level, unit's been running now for 45 minutes, thanks so much!
wow I changed my fuel pump for noting I drain the new oil did this and it runs fine now no more stoping love it thank you so much r Taylor maine
I appreciate your time in making this video. I was having the same symptoms, and fortunately came across your video. I'm definitely going to subscribe 😎
Thank you so much! we were on the road and this information saved the day.👍👍👍👍👍
glad it helped you
Thank you it’s solved our problem, we were looking for that one thing that we missed . Nothing worked til now.
very nice
I have to say this is exactly what is happening to me. It will run about 25 min maybe more then just stops. I have not checked the oil due to everyone sleeping at the moment and them needing AC so im going to check tomorrow but im really hoping this is the issue. This is a huuuuuge piece of info that I wish I knew about.
In my case it was almost no oil and I put two qts in and still no visible oil on dip stick lol...... I never heard of oil disappearing or burning out like that 🤔
You nailed it...my troubles are gone.. bless you
This makes sense! My generator will turn on fine, then die after 5-15 minutes. The start button blinks three time (maintenance required). I changed the oil, spark plug and cleaned the air filter. I always notice oil leaking from somewhere also. I’m going to do this and see what the result is, but I firmly believe this is the issue. Thank you!!
Did it work?
No I drained oil and only put in about 1/3 on the dip stick and still it would shut off. It would turn on for about 1 minute and die. Usually it only happens once and then runs fine. Sometimes it shuts off twice and then runs fine all day. Very weird!!! محمد عبدالعزيز
Wow, I am so glad I ran across this. I have a 2020 Entegra Anthem and have had the same problem. My Onan 12500 will run about 7 mins and just shut down. It will start right back up, but now only run 30 sec or so. The only time it has worked was when we drove it about 15 miles to a reputable service shop, and of course it ran for more than an hour with no problem (like I said, the only time it has run) Makes sense that driving and the fluid movement may have had something do do with that. Once we put it back in storage I went a week later to run it, and same ole thing happened. I have been on the phone multiple times with Entegra, Firefly, and Generator mechanic with no result. I am scheduled to take it back in tomorrow, but I am running over to drain some oil first, pray it works. Have you heard of this happening to the 12500? Also, I see the last post are a yr ago, has Onan fixed the problem? They are getting a call from me right now. Thank you so much for this very informative video. I am now subscribed.
no, onan wont acknowledge it, yes it still runs fine, been a few years and no problem further. yes it would apply to yours
@@vegasdavetv Well, me not being mechanical at all, once I got to the coach first thing that jumped out at me was the dipstick is along metal one and nothing like the one you show in the video. I do not believe I can suction any oil, so my first thought was to drain some. I ran it, and right on time at 7 min it shut down, I checked the level and it showed a hair over the full line. I guess I will keep my appointment tomorrow and relay the info. I just have a feeling after I drive 20 minutes to them, it will run fine. Think I will see if they would be willing to keep it over night.
Looks like it's air in the system, they had to add half gallon antifreeze. Been running a few hrs now. I left it with them, I want to let it cool down overnight and have them see what happens tomorrow, keep you posted
Yes... Yes... YEs. this was my problem.... great job.. now my Gen is running like a champ. thanks so much you Rock!!
your very welcome
This fixed my Onan 4500i as well. Thanks a million!!
Top video my friend. I'm sure this video will save people alot of money. Best use of TH-cam. Love these videos. Like from me 👍🍻
This happened this weekend. Someone told about this. I had should changed the oil. Thx.
I tried his Tip on my 99 Onan Marques 7000 MH Generator & it worked immediately
perfect!!!
Dipstick is practically useless as it is so sensitive to level. I drained my oil and put in exactly the 1.5 liters of oil. Now it runs fine.
I was having this same issue lately. My Cummings Onan 5500 generator would run for 10 minutes then die and it sounded like it was running out of gas. I thought I was having the problem due to parking on ground that isn’t level enough. I called Cummings and they told me I needed to take it in for service and it sounded like my fuel pump was going bad. I watched a TH-cam videos about changing the fuel pump then ran across your video. I took out half a quart of oil, and now it’s been running for 45 minutes no problems so far. Thanks for making this video. @vegasdavetv
your welcome, so glad it helped you out
I spoke too soon. It died again. I think it is a fuel flow issue now.
I changed the fuel filter and still no fix. I ordered a fuel pump from Amazon. When it dies, The fuel bowl is dry. I try to prime it and don’t hear the fuel pump so I’m pretty sure the fuel pump is getting hot and quitting.
Yep fuel pump went bad. I changed it out and now no problem running for hours.
Thanks Dave you saved my butt. I had my M/H service recently and they topped off the oil in the generator. As soon as I lowered the oil to the level you described it is running great! Thanks again.
enjoy and safe travels
Appreciate the great video, I try to figure out 2 years, I ready spend i lot money change too many parts, now I know.👍
When you check the oil level screw the dip stick only half turn and then check you oil level, when you done don’t forget to screw the oil cup all the way down. Thank you Dave!
Thanks! I replaced fuel and air filters and was ready to put a new fuel pump in. Couldn't get it to run more than 10 or 15 minutes. Took a little oil out and it's been running for almost 2 hours now! Sure had me buffaloed!!!
very nice, journey well
Amazing, so simple. sadly enough lots of people love to sell parts and a lot of people really do not care, seems a maint. bulletin would have been sent out to authorized repair stations, hard to say. I always thought Onan was a good brand. I think it is but if a shop can make a few $$ on un-needed parts. . .well.
You’re intelligence saved me from bothering the Onan clowns! Thanks
I saw another video where a guy relocated his fuel pump/filter outside of the case, because his fuel was vaporizing before it got to the carb. That could be a fix all in itself!
My generator was made in 2003 and I am so glad I do not have any type of oil level switch on it whatsoever. Forever I thought it did until the other day I had to removed the whole things and replace a bunch of wires that a rat had chewed. I had the whole thing completely apart and there was no sign of an oil level switch. I realize the dangers of it running too low on oil but after seeing everyone's frustration with it, I'd rather just keep an eye on the oil and not have to deal with wondering if it is the switch or not.
I don't have this model engine. I have several other larger Onan engines powering generators and bucket lifts and they have their own set of problems, but I would think that the way to determine the proper full and add marks on any engine of ant make would be to completely drain the crankcase, replace the filter and fill the engine with the exact amount the manufacturer states as full. Then after a short run then cool off time. pull the stick and mark the proper full mark because you now know the engine has the correct amount of oil. And without saying, make sure the engine is level when checking.
I just figured this out a few months ago! On my QG4000, dying was not the problem, but oil consumption and fouled plugs! I have had this unit for 5 years. My first mistake was filling the oil to the top of the filler neck like my Honda generators, but later found out that the level is supposed to be read after the dipstick has been screwed in. But then, even with the level set properly it was still using oil. But once the level stabilized at the halfway point on the dipstick it no longer used oil! So now my oil changes will only be filled to one half of the hash mark.
Just wanted to post this was exactly my issue. It keep shutting off and when I checked the oil it was at or just below the full line. Once I extracted some oil out it ran great!
perfect, glad it worked
when you check the oil do you screw it all the way in or dip it?
Wow I cannot believe this worked! Brand new QG4000 with 8 miles on it wouldn't stay on. I removed 17 oz or so and now its been idling for 40 mins now. Only issue now is that it idles down and up every 10 seconds or so under no load. With the AC on, it happens even more. Not sure if I should adjust the governor or not.
no one could fix the problem surging generator, pulled the excess oil, generator run perfect, thank you
thank you for your comment on the issue
Thanks for the heads up.... It appears to me that the correct marking on the stick would place the oil level at the upper mark if one checked the oil by screwing the oil check stick in to get the level.
Unbelievable I have a 5500 W Onan generator in my RV and it would run approximately five minutes and then shut off this is been going on for the last year and could not figure out what was wrong with it
. I watched your video and went out and lowered the oil level to halfway and it cured all the problems. Thanks
yippee, glad it worked for you to. it's so simple and easy that its hard...hard to believe the frustration only to find out its that simple...way to go
Thanks for the tip on high oil. Working fine now, used to run 3-5 minutes and shut down with service fault light.
THANKS
OFF SUBJECT,
I have an Onan RV QG 5500 LP. I want to convert it to gasoline or replace it with a diesel unit of comparable output and same physical dimensions. Have you ever heard of a conversion or know of a comparable output diesel unit that will fit in same footprint?
Reason for wanting to convert is it LIKES the propane. One would have to go to/find a propane fill station vs gasoline can get anywhere. As far as diesel I have a 100 gal aux diesel tank on board that I can pull from. Thanks for any info
Thanks a lot. Please warn people headed for Mexico to come equipped with a voltage regulator and a quality surge protector.
Ca
Great information...but it would be even more helpful if you spoke to "why" slightly overfilled oil causes the start-stop symptoms
Thanks for the video! You saved the weekend!
very nice
I know this video is 5 years old already, but would this method also apply to a new QG2800i generator? My level is right under the full line.
Damn would have never thought this. I have this problem. I just ran it. I’ll check it tonight and see.
This is also what mine is doing I have a 4000 generator. And also re-starting the generator many Times bronze the starter out. So pissed at Onan! Thank you
thanks for watching, ya easy to burn starter up I know. then remove generator to replace it on mine.
Just what you said work like a charm now thanks sir
very welcome
I have had this exact same problem and a buddy of mine with a newer trailer told me about it and it works. I can’t believe a company like Onan would not have this resolved by now I own a 2008 toy hauler and my buddy with a 2022 is still having the same issues😢
Thank you, that was helpful
👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻👍🏻
Months of aggravation. Cleaning fuel filters and air filter and plugs with no results. . I was thinking it would need to go in the shop and spend big dollars. I took out 20 milliliters using a syringe and it is running continuously now.. Thanks very much!
1999 2800 Microlight
thrilled 4 u my friend , nice
For me just below the full line worked. I had it right on the full line. 20 milliliters I took out is only 4 teaspoons but it was enough to work. I ran it for over three hours today with a heavy load on it. Before it would only run anywhere from 10-30 min and that’s all ,with or without a load. Never was able to get any more out of it in the year that I have owned it. Prior owner said he never had much need for it. I think he just knew it was a problem and avoided any questions about it.
Thank you so much.
I hope it works for me.
I'll drain a bit out tomorrow
Thank-you for the video, this help me solve my issue.
Thank you so much. It’s a wonder Onan don’t put a hit out on you. Probably cost them a million in maintenance fees. Actually had to take my level to the bottom of the stick! Makes me wonder if something changed since it was new. Used straight 30 weight oil. Maybe oil viscosity with the new lighter oils has something to do with it?
i do small engine repair. company name is North Valley Repair and now located in Kanehoe Oahu. I got a call to service a Onan 7000k model 7HGJAE. i will check this out next week and see if this is part of the issue with it overheating. It's been a year since it's last service and will see how it runs after new oil , plugs etc...
thanks for the video and heads up ..
Thank you, Sir!!!!
Thanks a lot man I have a unitedpower generator which I believe is doing the same thing they are out of business but it's brand new 3 years old never been ran I've had the same problem but came across your video it's very aggravating to deal with thanks I would have never knowing
Awesome, Mine just started doing that,My first thought was the filter. Thanks. Dave.
thank you for your comment
Just ran across this about a month ago on my trailer I just got I messed with it for about 2 hours and figured out that was the problem.
I am having the same problem occurring on my 1 year old gen with 18 hours. Code says "needs service". I dont recall running it while going down the road, just parked. It quit at elevations of around 7000 ft and on a climb. I plan to try your fix. Couldnt find a fluid evacuater so I bought a turkey baster at Walmart. I think it will work. My dipstick is all the way to the full mark (screwed down). I'll post results when I am back on the road in a week.
may be the issue and likely is.
@@vegasdavetv Your fix did work! The generator ran perfectly. I was able to remove the excess oil using an inexpensive turkey baster. Since then, I had the generator serviced at my motorhome's manufacturing facility. I have not used it yet, nor checked the oil level, but my turkey baster is on hand.
I have a 2014 Onan 4000. It is filled to the upper mark and has never died on me. We start it and run it while driving on trips most of the time.
Spot on!!
WOW, this worked!!!
I am having a fuel supply issue, 4000 ran for about 10 mins then cut out. Tried to restart and primer makes crackling noise. So I replaced the fuel pump and filter. Gen started and ran for about 20
Mins and same issue. Removed fuel line from filter and no fuel leaked out. Thought I had a minor hole or wear in fuel line to tank, so I replaced the fuel line. Fuel pump still make crackling noise. Any suggestions you and your viewers seem to be dialed in on the Onan 4000
Since new, my 5500 wouldn’t run with both a/c’s on for more than 5 minutes, and with 1 a/c it was good for 30 or so. Oil level was a little high, but I thought more is better than not enough. Anyways, I adjusted it to what you recommended and it’s been running for 45 minutes or so with EVERYTHING on. Thank you so much, problem solved.
enjoy it, thanks for your comment my friend