Replacing A Fuel Filter On A Cummins Onan RV Generator - RV Maintenance - Cummins Onan RV QG 4000
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- Опубліковано 12 чер 2020
- I replace the fuel filter on my Cummins Onan RV QG 4000 RV Generator. Links to genuine Cummins Onan Parts below.
You can read more about Changing The RV Generator Fuel Filter on my blog at:
www.rvhabit.com/post/replacin...
(Affiliate) Links:
• See Cummins Onan Fuel Filter 149-2457 on Amazon: amzn.to/37nnnfm
• See Permatex High-Temp Thread Sealant on Amazon: amzn.to/3hef3CS
• See Cummins Onan Air Filter 140-3280 on Amazon: amzn.to/3cK16cJ
• See Cummins Onan 4000 Tune-Up Kit on Amazon: amzn.to/30oMmx9
• See Cummins Onan 15W-40 Oil on Amazon: amzn.to/2MIKZkT
• See Cummins Onan Spark Plug 1670275 on Amazon: amzn.to/37d2PWO
• See Cummins Onan 4000 tune-Up Kit w/oil on Amazon: amzn.to/2AOCrX3
• See Cummins Onan Fuel Pump A047N926 on Amazon: amzn.to/3dSthra
You can also visit RV Habit's Amazon Page for all the great items we use at
www.amazon.com/shop/rvhabit
As an Amazon Associate I earn from qualifying purchases
(I have no affiliation with the company or products in this video. I purchased the products and use them personally).
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#rvmaintenance #rvtips #rvgenerator - Навчання та стиль
Thank you for your video Lou! I’m a 56 year young lady new at RV life, but decided to learn how to do my own maintenance, and so far: Oil change, Fuel filter, air filter & Spark Plug replaced! Thanks for your help!!!
I couldn’t have done it without your guidance. From my heart to yours…you are awesome!
Hi, that's awesome. I started this channel to help new RVers and that makes me happy to know you got value from it.
@@RVHabit the best of the best! Thanks for taking time to help. Truly appreciated, and I will be following all your explanations…
I just found you on UA-cam. It’s awesome because i have the same size generator as you and you make the maintenance look so easy. I changed the oil in mine yesterday and it was a piece of cake. Thanks for the instruction...
Welcome aboard! Yes this is a very easy maintenance item but it often gets neglected. Thanks so much for taking time to comment.
Nice and easy preventative maintenance. Great Job, Lou! 😀
Thanks! 👍 Easier to change than most people think.
Well done! Clear, concise, understandable; plus none of the fluff that a lot of other youtubers put on their videos.
I appreciate that!
Very good video! Got all points covered, in a easily understandable way.
Thanks for taking time to comment and thanks for watching.
Thank you so much for posting these videos.
Another great video Lou! Even though we use a portable generator, this video reminded me so go do preventative maintenance on ours.
Hi thanks so much for watching. Hope all is getting back to normal. Stay safe.
Thanks Lou, just ordered mine. Keep up the great videos.
Thanks Al.
Thanks so much for your video's i am a first time doing this myself and it has made me feel much better about being able to do this.
Hi Donna, You can do it!
Thanks for the info and links, really helpful.
Another great video. Thanks for the heads up on my locked up video. 25 views and you was the only person that said anything. Thanks a bunch man !!!! We need to talk on the phone some time.
No problem 👍
To da point with great detail! Mahalo brah.
..feggedaboddit..
Thank you for DIY video. Very informative and helpful.
You are welcome!
Thank you. That will help me with my generator
Glad I could help
Nice Video, thank you!
Thank you for taking time to comment.
You must live up north, we don't have to deal with rust in east Texas. Another great video, thanks.
Yes I do live up north where salt on the roads eats everything it touches. Thanks for watching.
Thank you for the video.
Thanks for watching!
Thank you!
Good content, thanks
Thank You.
Good Job Lou on the fuel filter replacement. I have a few years to go before replacing mine, I’m thinking maybe I should buy a few “filters” now for my 5500 genny as well as for the air filter. BTW loving the shirt ;) 👍
Thanks Tim , I agree probably good to have a filter on hand. I love that shirt lol. Thanks for commenting.
Thanks!!!
You're very welcome!
Think for the education.
Informative video, mine’s not starting so gonna change out the filter and see if that help. Thanks
Hi Steve, Also make sure the fuel pump is working. Seems to be a common problem. Good luck.
@@RVHabit I got it started by using carb/ choke cleaner, but it still doesn’t stay started. I’m going to replace the filter and fuel pump and see if that’s the culprit. Thanks for the info.
Hi Steve, Yes could be a fuel delivery problem. Also, the carbs love to gum up with ethanol fuel. After you get it running check out my video on exercising the generator with Seafoam. Good luck.
So glad I found your channel thank you. Straight to the point, very clear instructions and great camera work! Question: is the fuel filter that you put a link to good for all different models? Or do I need a model specific filter? I have a gas 4KYFA_26100P
Most any part is model specific. Check your owners manual for replacement part numbers. The link below states it is for the QG generators and not model number specific. It is possible the correct model number is also listed on the cover for your generator. Good luck.
Question: is it the same procedure for LP Fuel Filter? I have model 3.6KY 26120R Onan Cummins generator. Thanks for your helpful videos!
Several RV owners have installed a fuel cut-off in the generator fuel line. That way, the fuel can be shut “off” before placing the generator in storage. Then letting the generator run until it stops for lack of fuel. In theory, this reduces the potential for gum and/or varnish to form in the carburetor. But you have to remember to turn the fuel cut-off back “on” again when you want to use the generator.
I have heard of this and it seems like an excellent idea. Maybe a new project video in the future. 👍
THIS IS HOW I FIXED MINE, IN THE CASE OF....
"I CAN'T START MY GENERATOR"
It's has been two years since last time it was running, so I started by checking oil level full at gen dipstick (it won't start if low oil because of sensors) then I checked gasoline more than 1\4 tank in the RV (also safety sensors), sparkplug checked for good spark, also checked the manual reset circuit braker ( to be ON) at front motorhome engine compartment for 12v current to the generator to be able to start it, also cleaned the carburetor and even installed new one but same situation, then checked wires and found some has been chewed like gum by rats at the back of starting switch generator panel so I replaced them, at this time the generator started but stay running only by keep pushing the switch on all the time, so then finally I knew it was internal electrical problem from the engine itself, so I took the generator out from my RV to work in my garage, (I did this by myself with some tools and old Mayan tricks ) lol, it's really heavy for one person.
I disassemble the unit at my garage and started by removing the cover, then the cooling fan or flywheel unit (it's 2 items in one) until finally I was at the gen rotor and brushes assembly area and this is what I found: one more wire chewed by filthy rats plus the stinky rat nest in the middle of the generator motor coil, I fixed the wire and sanded the commutator copper contacts where the brushes are sitting becouse they were real duty with old urine from the rats, and of course I got rid off the stinky nest, lol!!!
Then I assembled everything back together and... bingo it's runing like a champion!!!
For this project materials involved was about $60.00 including an aftermarket new carburetor and an harmonic balancer/steering wheel puller (available at any auto parts for $25.00) to pull the aluminum fan out and (flywheel).
Just picture this: (Any gasoline engine run smooth if gasoline and DC current aren't interrupted) so following this important principle you'll always find the problem to be fixed.
Also if you have a onan microlite 4000 like mine, don't run it for more than a minute without the cover because you'll cook the engine real fast, also keep the eye on the aluminium fan and your fingers after cranking it in case you missing one or two members...just kidding, lol!!!
After testing the gen with the help of a gasoline container, a piece of hose and 12v battery, I did put the air cooling assembly back and the rest of components including the cover, then it was ready to be installed at my RV.
Once the gen was installed back at my motorhome I started it to be tested for 120v electricity but not before flipping the AC circuit switch (on) at the gen starting control panel (sometimes hiding under or around the panel) to be able to transfer power to my RV GFCI main outlet and electric panel as well, my motorhome it's equipped with GFCI so I reset it and tested for green led light indicating power is ready at my main breakers panel, so I turned my main breaker (on) along the others ones but no power was present at my breaker main switch (faulty main braker) so I flipped it many times, sometimes you can make it work again, mine did work, lol!!!
I'm happy because everything works now including the refrigerator for cold drinks and AC for this crazy summer, lol! Later I'll buy me a new main braker, for now this is a resurrected generator story that needed to be shared.
If this can help eaven one person to save time and $$$ it'll make me more happy, thanks for reading!
Thanks for posting such a detailed comment
@@RVHabit you welcome!!!
Thank you for the video! It definitely helped! Quick question. I have some thread of the fuel filter still showing, but hand tightened and the with a ratchet as tight as it would go. Is that normal?
Don't recall how mine looked but sounds normal.
Lou, thanks for the video. My gen only runs when I make a direct fuel line from a gas can below it. I don't get any fuel into the carb when it's connected to the Ford 450 gas tank. So I'm not sure if the problem is a weak pump or a crack in my fuel line. One clue that it's a bad fuel line might be that no gas drips from the fuel line when I detach it from the gen. What do you think my problem might be ... the fuel pump is too weak to pull from the gas tank or the gas line has a crack? Thanks for your informative videos!
I would start with the fuel line. Fuel should drip from that line when removed from the gen pump. You also stated the fuel pump on the gen is working since it will run when you use a separate fuel can. Good luck.
Hi - thx for your videos and information!! I went to the link for the Cummins Onan A047N926 Fuel Pump and it says it’s not available- do you have other options?
Unfortunately in todays world so many things become out of stock. I do not recommend using a knockoff "will Fit" model. Search the internet for someone who may sell genuine Onan parts. Good luck.
Suggestion, write the date on the side of the filter, that way you know how long its been since you replaced it last.
excellent idea.
Hi there, I’m a new RV’r also and am eager to learn all the things. Regarding work on my onan 4000 generator; should I disconnect battery power prior to?
Disconnecting batteries is a good practice when doing any work on the RV.
Thanks so much for info. Why would a Florida Gander RV sell me $15 oil 15w-40? For Florida?
Hi, I believe Onan has gotten away with using the sae30 and now recommends the 15w-40. You should be good to go.
How replace fuel pump
Hi Lou, I use "LOCTITE" at my work and was wondering why you are using the Thread locker on the filter? will it come back out easy? I know how Loctite is, never used that stuff. What about anti-seize, like what you would use on spark plugs? Thanks, Phil
Hi Phil, great question. I have always used thread sealant on small engines. Just something I learned as a kid when dealing with fuel fittings. It seems to come off easy when its time to remove and replace the filter but resists loosening due to vibration. Loctite is more of a thread locker and may even require heat to remove. I am not sure anti-seize would have any vibration or leak prevention qualities.
@@RVHabit ok I will give it a try. going to replace mine this weekend. thanks for all the info and your videos.
Never use a thread locker as a sealant, and never use anti-seize, neither of them is a sealant. You must use a gasket sealant specifically made for use with gasoline. I use PRIME SEAL; O'Reilly carries it, and it comes in small inexpensive bottles in 3 grades, where the cap incorporates a brush applicator. Grade 3 is made for aircraft fuel lines and that's what I will be putting on my fuel filter connection to the fuel pump tomorrow, because I connected them clean and dry, my usual practice, and the connection seeps. Remember the level of the fuel in your gas tank is way above the level of the pipe running into the fuel pump inlet, so when you stop the generator there will be a full fuel line all the way to the to this entry point, and will act as a syphon, and keep the gas seeping and dripping as long as long as there is gas above the inlet of the feed pipe in the tank, which goes down to the 1/4 tank level.
Maybe spray paint the exposed part of the filter before installing to deter rust?
Not a bad idea.
I’m not sure what I did wrong but I replace the fuel filter and now my generator won’t start 😬
I would NOT be putting high temp thread locked on that fuel filter.
I’d put anti seize on it instead.
Where to buy the fuel filter?
I got mine on Amazon here amzn.to/37nnnfm
Mine made it about 450 hours until it failed
Don’t see any links..
Hi Tony, They are below in the video description box. Make sure your expanding the description box to see the links. Thanks as always for watching.
Take more care not to block what you are doing. Informative video overall.
Where's the links?
Hi Whitney, You can find the links in the UA-cam description below the video or on my article at www.rvhabit.com/post/replacing-a-fuel-filter-on-a-cummins-onan-rv-generator-rv-maintenance
@@RVHabit Thanks a lot! Good luck!
You mention that the full filter is a couple of bucks. $20.
By the way. Great video.
Prices have gotten out of control. I paid $12 in May of 2020
Please don’t change a filter because the outside looks bad….you will be wasting money. Follow the manufacturer timeline. The outside fortunately does not filter the fuel. Do you tear your truck bed off because it looks bad? Nope.
I change the oil and filter according to Cummins Onan recommended intervals. Yes things may look bad from the outside but does not effect its function.
Thank you!
You're welcome!