Great UA-cam, I love the troubleshooting part, sure beats guessing. I ordered an amazon fuel pump, it was the exact part number (149-2620), same as yours but it didn't fit. It was a little shorter and the output didn't line up with the hole. So, I bought an Edelbrock 3.5 psi micro fuel pump. made a bracket and mounted in the general area, I didn't want to wait for another amazon pump that wouln't fit and didn't want to pay $350 for one from my local generator shop. The Edelbrock works great but the mounting wings were too big to use the original mounting holes so I made a bracket, I love your discussion on fuel line debris so I bought a new fuel line ($4.00) in retrospect, I would always replace hoses when I can, they get hard and brittle.
Finally! I had read that these fuel pumps go bad but yours is the first video I have found to complete reasonable trouble shooting and then actually fixing the issue. Thank you! Now if I could just figure out how to get that rear spark plug out, damn they wedged that thing in there.
@@ktoutdoor Good morning Kevin, I wanted to update you and your viewers on my Onan situation. I have a model 5.5HGJAB -6755K installed in our 2015 Momentum 350M. Like you, I was fuel starved and couldn't figure out why. Your video helped me a lot w/ trouble shooting. I replaced the fuel pump and filter (on my model year they moved the filter and it attaches directly to the pump on the input side...much like the modification you did on yours). Unfortunately, that did not fix my issue, it still shutdown un-commanded. I got the idea to run a fuel line from the input side of the fuel filter directly to a gas can from another video; in trying that I confirmed that the genset ran fine. Therefore , fuel filter pump and carb were all eliminated as culprits. I also confirmed there was little to know fuel coming from the fuel line when I detached it from the filter. At this point I was thinking a blockage in the line and or the tank and my next step was to replace the line, but first I used my air compressor to blow out the line from the end that connects to the filter...using less than 50 psi, the rated psi of the fuel line. When I blew out the line I found a hole in the line fairly close to the tank where it traverses a frame members. Likely caused any abrasion. Just like trying to suck soda out of a glass w/ a cracked straw, the pump could not pull adequate fuel from the tank w/ a hole in the line. I repaired the hole w/ a male to male brass barbed nipple and I'm back up and running. I needed to replace the fuel filter anyway and the pump was not that expensive...and now I have a spare but I did want to put this out as another possible cause of fuel starvation. Quick additional note, my unit has what is called a "purge line" another fuel line that runs from the genset all the way back to the tank. I'm not completely certain of the purpose but when you are tracing your fuel line you may need to ensure you are tracing the correct one back to the two separate attachment points on the tank. Again, thank you for the video and trouble shooting techniques, learned a lot!
@@acampbell198 Thanks for the great write up. In fact I have seen that before on old cars where the old rubber hose would crack causing it to suck air instead of fuel. When I installed new fuel pump in the fuel tank I installed a new line from the tank to the generator it was 19 years old and pretty stiff.
Thank you for this video, I had the same problem with mine. I opened the bleeder after it shut down and barely any fuel came out of the bowl. Code 36, I replaced the fuel pump and fuel filter at it ran for 45 minutes with the a/c on two warm up and cool down cycles with out shutting off. great video very helpful content, keep them coming !
If you do this fixed don't forget to replace the fuel filter you'll see the little fuel filter just before the fuel pump. Owen recommends changing both the fuel pump and the fuel filter at 450 hours.
The oil dip stick is defectively designed. The oil cavitates because it is too full and gets air whipped into it. Then the engine overheats. So remove oil until it is just touching the bottom of the stick.
Hi ,do you have a video on Onan 5000 on why it only runs holding the start button in? I have check oil level and bypassed the oil pressure switch. Still won't stay running?
@jerryeicher7797 I don't have a service manual for the 5000 . Find one. It could also be bad brushes. Some boards will not allow engine to run if it don't see voltage. Flight systems my have a troubleshooting guide.
Who replaced the additional Onan filter at the carburetor with a collection of pipe fittings? And since you had everything out, why wouldn't you just replace that section of '2004' fuel line with new rather than worrying about flaking off a little piece on the barbs?
The pipe fittings is a upgrade fix the original design had a metal crimped style fuel filter that hung along side the carburetor and was prone for leaking gas that may cause a FIRE, so Onan has since made a kit to eliminate the fuel filters location next to the carburetor. The kit is over $20.00 I made mine for $5.00 See more info here bobsguides.com/leaking-generator-fuel-filter.html Fuel line: at the time I was in a Walmart parking lot If I had new and correct line I would have replaced it regardless even new fuel line can get slivers of rubber torn off by the barbed fittings. PS: If you have A fuel filter mounted next to the carburetor I would eliminate it.
Kevin, thanks for your videos. I have a question regarding this same generator. I have a mouse that ate through 4 of the wires going to the oil pressure switch, voltage sensor and auto choke. They aren't numbered and they are all white. Any clue how to hook them back up correctly?
I have the successor genset, QG 5500 Evap, which is the same design as yours. How old (how many hours) was the fuel pump that you replaced? I'm curious to know what to expect on mine.
Hey Kevin great video. I have the same gen on my 04 Dutchman toy hauler. Will not run, when I take the fuel line off the carb and hit the primer I get fuel. When the line is on the carb and the fuel bowl drain is cracked I get nothing? Mined you I just bought this used. Looks like a brand new carb. Any info would be greatly appreciated. Thanks Wayne
Remove the carb bowl it may need cleaning also the float may be stuck in the closed position a slight tug on float should get the gas flowing. Call my cell if you like 606-875-0125 Kevin
Yep exactly what I did and got a big nogo at this station ! Same problem runs for a bit then dies changed filter add extra filter new fuel lines removed 1 pint oil stil s as me thing !
Kevin, i have a 7000 that does that but i have changed the pump to no avail. One thing i have that didnt see on yours. 2 fuel filters ,one on gen and one next to pump. Also have you had trouble with oil sensor and had to replace. Thx
I'm hoping that is something I can fix on mine as well. The only thing in the video that is questionable is you said it ran fine for about 10-15 minutes before it died and at the end of the video it started and you ran it for less than 60 Seconds turned it off and said music to my ears so you're still not really sure that after 15 minutes it's still going to keep running. The other comments give me confidence that replacing it is probably the issue.
@@ktoutdoor are you aware of how exactly the gen fuel line is connected into the main tank? I was told by a family member that the fuel line going to the tank was bad. Is this something that can possibly be replaced without having to drop the tank?
Great UA-cam, I love the troubleshooting part, sure beats guessing. I ordered an amazon fuel pump, it was the exact part number (149-2620), same as yours but it didn't fit. It was a little shorter and the output didn't line up with the hole. So, I bought an Edelbrock 3.5 psi micro fuel pump. made a bracket and mounted in the general area, I didn't want to wait for another amazon pump that wouln't fit and didn't want to pay $350 for one from my local generator shop. The Edelbrock works great but the mounting wings were too big to use the original mounting holes so I made a bracket, I love your discussion on fuel line debris so I bought a new fuel line ($4.00) in retrospect, I would always replace hoses when I can, they get hard and brittle.
That's some great info you have there,, thanks for contributing. Have a blessed day
Finally! I had read that these fuel pumps go bad but yours is the first video I have found to complete reasonable trouble shooting and then actually fixing the issue. Thank you! Now if I could just figure out how to get that rear spark plug out, damn they wedged that thing in there.
Yes you need a skinny arm. And that fuel pump is still working that i put in.
@@ktoutdoor Good morning Kevin, I wanted to update you and your viewers on my Onan situation. I have a model 5.5HGJAB -6755K installed in our 2015 Momentum 350M. Like you, I was fuel starved and couldn't figure out why. Your video helped me a lot w/ trouble shooting. I replaced the fuel pump and filter (on my model year they moved the filter and it attaches directly to the pump on the input side...much like the modification you did on yours). Unfortunately, that did not fix my issue, it still shutdown un-commanded.
I got the idea to run a fuel line from the input side of the fuel filter directly to a gas can from another video; in trying that I confirmed that the genset ran fine. Therefore , fuel filter pump and carb were all eliminated as culprits. I also confirmed there was little to know fuel coming from the fuel line when I detached it from the filter. At this point I was thinking a blockage in the line and or the tank and my next step was to replace the line, but first I used my air compressor to blow out the line from the end that connects to the filter...using less than 50 psi, the rated psi of the fuel line.
When I blew out the line I found a hole in the line fairly close to the tank where it traverses a frame members. Likely caused any abrasion. Just like trying to suck soda out of a glass w/ a cracked straw, the pump could not pull adequate fuel from the tank w/ a hole in the line. I repaired the hole w/ a male to male brass barbed nipple and I'm back up and running. I needed to replace the fuel filter anyway and the pump was not that expensive...and now I have a spare but I did want to put this out as another possible cause of fuel starvation. Quick additional note, my unit has what is called a "purge line" another fuel line that runs from the genset all the way back to the tank. I'm not completely certain of the purpose but when you are tracing your fuel line you may need to ensure you are tracing the correct one back to the two separate attachment points on the tank. Again, thank you for the video and trouble shooting techniques, learned a lot!
@@acampbell198 Thanks for the great write up. In fact I have seen that before on old cars where the old rubber hose would crack causing it to suck air instead of fuel. When I installed new fuel pump in the fuel tank I installed a new line from the tank to the generator it was 19 years old and pretty stiff.
I also had this same problem and just replaced the fuel pump from Amazon.And it works without any more trouble.....Thanks for the info again.......
Thx! Helped me figure out how to drain the bowl. think I had some water in it. Fired up now! Gonna do the fuel filter just for good measure.
Glad it helped you out, Thanks for leaving a comment.
Thank you for this video, I had the same problem with mine. I opened the bleeder after it shut down and barely any fuel came out of the bowl. Code 36, I replaced the fuel pump and fuel filter at it ran for 45 minutes with the a/c on two warm up and cool down cycles with out shutting off. great video very helpful content, keep them coming !
More on the way.
Thanks for leaving a comment
I have the same gen. It is a work horse. Never had to change fuel pump yet. But now I know how.. Thank you for sharing.
I have a 2004 38R. Your videos are fantastic sir. Thank you
Herrell's Window's Solutions LLC thanks for watching and leaving a comment. If u ever need help or questions let me know.
If you do this fixed don't forget to replace the fuel filter you'll see the little fuel filter just before the fuel pump. Owen recommends changing both the fuel pump and the fuel filter at 450 hours.
Good Ideal
The oil dip stick is defectively designed. The oil cavitates because it is too full and gets air whipped into it. Then the engine overheats. So remove oil until it is just touching the bottom of the stick.
Hi ,do you have a video on Onan 5000 on why it only runs holding the start button in? I have check oil level and bypassed the oil pressure switch. Still won't stay running?
@@jerryeicher7797 www.flightsystems.com/onan-replacements.html
@@jerryeicher7797 you may need a new controller board.
@@ktoutdoor i replaced that too. could have i hurt it installing it?
@@ktoutdoor That is what i thought went out because it went down on a 90 degree day running the AC hard.
@jerryeicher7797 I don't have a service manual for the 5000 . Find one. It could also be bad brushes. Some boards will not allow engine to run if it don't see voltage.
Flight systems my have a troubleshooting guide.
Mine won’t crank at all, but it has power to it. Any idea how to get to the starter solenoid without taking out of coach?
Give me a call or text my cell 606-875-0125 Kevin
Who replaced the additional Onan filter at the carburetor with a collection of pipe fittings? And since you had everything out, why wouldn't you just replace that section of '2004' fuel line with new rather than worrying about flaking off a little piece on the barbs?
The pipe fittings is a upgrade fix the original design had a metal crimped style fuel filter that hung along side the carburetor and was prone for leaking gas that may cause a FIRE, so Onan has since made a kit to eliminate the fuel filters location next to the carburetor. The kit is over $20.00 I made mine for $5.00 See more info here bobsguides.com/leaking-generator-fuel-filter.html Fuel line: at the time I was in a Walmart parking lot If I had new and correct line I would have replaced it regardless even new fuel line can get slivers of rubber torn off by the barbed fittings. PS: If you have A fuel filter mounted next to the carburetor I would eliminate it.
@@ktoutdoor Thx!
Great video thanks, I have the same generator with the exact same problem.!
Thanks for leaving a comment..
Thanks for this video and info. Very helpful. I also liked your quick fix on the upper fuel filter removal.
Thanks for watching
Could that possibly be a cause of losing power to the generator
I'm not sure what you are asking call or text my cell 606-875-0125 Kevin
You must have taken the filter off the motor,one near pump now ?
Yes under neath less likely to leak next to hot engine.
we had this type of trouble at 4000 Onan generator, replacing the fuel pump solved our problem
Thanks for watching.
Awesome ..ty! 😎
Nice work thank you
Thanks for watching
Kevin, thanks for your videos. I have a question regarding this same generator. I have a mouse that ate through 4 of the wires going to the oil pressure switch, voltage sensor and auto choke. They aren't numbered and they are all white. Any clue how to hook them back up correctly?
If you follow the wires back more can you find any numbers?
@@ktoutdoor one says choke +, one says S2 P1-13. Still searching the other 2
Found choke -
If u ground the oil switch wire I think it will kill the engine
If u ground the oil switch wire I think it will kill the engine
I have the successor genset, QG 5500 Evap, which is the same design as yours. How old (how many hours) was the fuel pump that you replaced? I'm curious to know what to expect on mine.
Steve Johnson it's a 2005 model and the fuel pump failed at about 375 hours..it's works fine ever sense. Also check out my valve adjusting video.
Kevin Caudill Thanks. I have 455 hours on mine. Guess I ought to buy a new pump and filter to keep on hand.
When you pulled the line off the part, what is the part called that the rubber tube was attached to?
Hey Kevin great video. I have the same gen on my 04 Dutchman toy hauler. Will not run, when I take the fuel line off the carb and hit the primer I get fuel. When the line is on the carb and the fuel bowl drain is cracked I get nothing? Mined you I just bought this used. Looks like a brand new carb. Any info would be greatly appreciated.
Thanks
Wayne
Remove the carb bowl it may need cleaning also the float may be stuck in the closed position a slight tug on float should get the gas flowing. Call my cell if you like 606-875-0125 Kevin
Yep exactly what I did and got a big nogo at this station ! Same problem runs for a bit then dies changed filter add extra filter new fuel lines removed 1 pint oil stil s as me thing !
Text or call 606-875-0125 I will help you trouble shoot. Kevin
Kevin, i have a 7000 that does that but i have changed the pump to no avail. One thing i have that didnt see on yours. 2 fuel filters ,one on gen and one next to pump. Also have you had trouble with oil sensor and had to replace. Thx
Elwood call my cell I will help you trouble shoot 606-875-0125 I stay up past midnight most every night.
I'm hoping that is something I can fix on mine as well. The only thing in the video that is questionable is you said it ran fine for about 10-15 minutes before it died and at the end of the video it started and you ran it for less than 60 Seconds turned it off and said music to my ears so you're still not really sure that after 15 minutes it's still going to keep running. The other comments give me confidence that replacing it is probably the issue.
Yes this was repaired years ago and still works just fine. call or text my cell if a can help you 606-875-0125 Kevin
@@ktoutdoor are you aware of how exactly the gen fuel line is connected into the main tank? I was told by a family member that the fuel line going to the tank was bad. Is this something that can possibly be replaced without having to drop the tank?
@@LostinArkansas Call or text me sometime I can help you with the fuel line my cell 606-875-0125 Kevin