Free 7 Day Trial RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 12-07-2021, 03:50 PM   #1
Junior Member
 
Join Date: Jun 2011
Posts: 28
Generator problem

I have an Onan Marquis Gold 5500 and it runs for about 5 minutes and shuts down. I have changed the oil and filter. I went to an RV repair here in Yuma and was told that it was the carburetor. I ordered a new carburetor and installed it and used an inline clear gas filter to see if it was still getting gas. I started it and it ran great but after about 5 minutes it shut down again. I checked the codes and it gave me a 36 code and it was to tell me that the unit had shut down. Go figure.

Anyone familiar with this kind of problem and ANY suggestions that could help, would be my next champion!!!
Thanks!!
smartguy is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 12-07-2021, 03:57 PM   #2
Member
 
Join Date: Jul 2016
Posts: 66
Generator

Mine would do that, as soon as the generator warmed up it would quit.
turned out to be a bad fuel pump.
Easy to change out.
__________________
2016 american allegiance with all the bells and whistles.
2019 Chevy Sonic pushing. Magna Sine 2812 inverter
DonR is offline   Reply With Quote
Old 12-07-2021, 03:58 PM   #3
Senior Member


 
Join Date: Nov 2018
Location: Fulda, MN
Posts: 719
Blog Entries: 1
Mine was doing the same thing after I got it. Ended up being the fuel pump, it would get hot and quit. I installed an inline fuel filter also but kept having problems and kept watching the inline filter. I noticed the filter never got full so I removed it and all was well for that part. It had sat for several years before I got it and the carb was gummy and no rebuild to it so a new carb was next. I still have problems when I first start it as it wants to search. I find if I shut it off after a couple minutes and restart it it runs better but still not the wayu it should. It sometimes think it's just an Onan thing.
__________________
2000 Winnebago Adventurer 32v, P32 Workhorse Chassis 7.4l Vortech, J71 Ultra RV upgraded 67,000 miles
David 70 is offline   Reply With Quote
Old 12-07-2021, 04:10 PM   #4
Senior Member
 
Join Date: Aug 2020
Location: Ohio
Posts: 1,152
How old is gen?... guess if don't know... also when was last time fuel pump changed?
Have you cleaned the armature slip rings ?
Have you pulled fuel line at carb and made sure great stream ..?

1st.. don't throw away old carb.. they are easily cleaned.. I suggest you look on you tube KEVIN CAUDILL.. he shows step by step how to clean carb..

Never take onan gen to any shop... they have no idea of what to fix.. if you find one that does.. please let us know..

I have never had any luck with any authorized shop.. it seems they just have no clue how to fix..
These gens are bullet proof.. so roll up sleeves and sit back and read...
I and many members here have so many tips and repair opinions posted about onan 5500 and others..
So search my name
Good luck and let us know what you did and maybe better members then me will help you
__________________
2000 southwind storm, workhorse custom chassis with 7.4l vortec
donr103 is offline   Reply With Quote
Old 12-07-2021, 07:12 PM   #5
Member
 
fatsurf's Avatar
 
Join Date: May 2020
Posts: 62
They are really sensitive to oil level, suggest making some adjustments to that before anything else.
__________________
California beach born and raised.
2007 Fleetwood Bounder 35E
fatsurf is offline   Reply With Quote
Old 12-07-2021, 08:08 PM   #6
Junior Member
 
Join Date: Jan 2014
Location: Beesley's Pt NJ 08223
Posts: 4
Onan 5500 not running

This time last year mine would run and then die after 10 minutes.Replaced in line filter and fuel pump.Bench tested pump and was working as it should. Primed and ran for a short time and then stopped. I then decided to pull off fuel line before pump and no fuel leaking out of hose. I checked the fuel line back to tank and it was corroded with rust. I knew then that there was a pinhole along the line. Took MH to truck shop and they replaced line and said generator ran good off of a gallon can hook up while they were fabricating fuel line.Started my 2500 mile trip and it ran enough to cook a dinner or two and then had problems again. It's now at a new shop and they called and said carb bad and are replacing it. This genny has about 50 or less hrs. The MH was bought new in 2015.It's hard to find Onan repair shop in my area. CHECK THAT LINE TO TANK NEXT TIME
daddude1218 is offline   Reply With Quote
Old 12-07-2021, 08:30 PM   #7
Senior Member
 
CamJam1's Avatar
 
Join Date: Mar 2019
Location: Arizona
Posts: 1,642
The "36" code is a catch all code, but usually means a fuel problem. Mine was doing the same thing and replacing the carburetor fixed it, but since you have already done that I would replace the fuel pump. Don't get a high pressure pump. 3.5-4 psi works best with gas Onans. Plenty of pumps on Amazon and E-Bay will work, but most are made in China. I bought this one, Made in the USA for a few dollars more and it's working well.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Could definitely be a crack in the fuel line too. I chased my tail for months, including changing fuel lines and even the pickup location in the fuel tank before I found out it was the carburetor.
__________________
2004 National Dolphin LX 6320, W-22, 8.1, Allison 1000, Front/rear "Trac" Bars & Anti-sway Bars, Sumo Springs, Roadmaster Reflex Steering Stabilizer, 2005 PT Cruiser Toad
CamJam1 is offline   Reply With Quote
Old 12-07-2021, 10:27 PM   #8
Senior Member
 
wog099's Avatar


 
Tiffin Owners Club
Join Date: Dec 2018
Location: Nacogdoches, TX
Posts: 483
On mine that would run for a while, then shut off, a fuel pump replacement fixed it and it has run great ever since.
As others have said there are a number of issues that can happen with generators (and most shops do not have a clue). From what I have seen on this forum, it is usually a fuel issue, but not always.
Thanks,
__________________
Wade & Debby Griffin
2018 Tiffin Allegro Open Road 32SA, Ford F53 24K Chassis
2012 Jeep Liberty
wog099 is offline   Reply With Quote
Old 12-08-2021, 08:11 AM   #9
Senior Member
 
George Schweikle's Avatar


 
Join Date: Apr 2004
Posts: 3,195
X2. I had the same issue on an Onan 4000 and chased a lot of other "cures" before finally replacing the fuel pump. Urban legend has it that the Onan fuel pump can sometime be marginal even in a new generator.

Quote:
Originally Posted by DonR View Post
Mine would do that, as soon as the generator warmed up it would quit.
turned out to be a bad fuel pump.
Easy to change out.
__________________
George Schweikle Lexington, KY
2005 Safari Trek 28 RB2 Workhorse 8.1, FMCA 190830, Safari International chapter. 1999 Safari Trek 2830, 1995 Safari Trek 2430, 1983 Winnebago Chieftain, 1976 Midas Mini
George Schweikle is offline   Reply With Quote
Old 12-08-2021, 08:34 AM   #10
Senior Member
 
Join Date: Aug 2020
Posts: 441
Onan Marquis Gold 5500 Master Class on youtube

95% of the things you need to do to keep your generator running top notch, you can do yourself instead of taking it to a shop. And it's not that difficult to learn.

Sometime ago, I found a great 3 part series on youtube titled "Onan Marquis Gold 5500 Master Class". It's free and it covers just about everything you need to know on how to properly maintain a Onan Marquis Gold 5500, service schedules, replacing parts, proper exercising, slip rings and more. It also covers some trouble shooting tips.

If you're not sure how to service your RV Gas Generator and would like to learn, this video series is for you.
https://www.youtube.com/playlist?lis...cn1LTAzgImKgH0
__________________
Traveling Full Timers
Gas Motorhome
Escapees, Maintenance Freak
mr.tommy is offline   Reply With Quote
Old 12-08-2021, 10:12 AM   #11
Senior Member
 
Join Date: Mar 2015
Posts: 102
Mine did that last month on a trip to Illinois. Bad fuel pump
Bought a cheap one off Amazon and it leaked. Ended up paying more for an OEM from Onan. Fairley easy install. Hardest part was getting the old fuel lines off
__________________
2014 Georgetown 351DS
Charleston SC
2 Boston Terriers, 1 Frenchie
cjd10 is offline   Reply With Quote
Old 12-09-2021, 12:55 PM   #12
Junior Member
 
Join Date: Jun 2011
Posts: 28
Generator Problem Update

Thanks to all of you for taking time to offer your solutions for my problem. I have taken that advise and ordered a fuel pump and I'm now confident that this will solve my issue.

Again, many thanks to you all!!!!!
smartguy is offline   Reply With Quote
Reply

Tags
generator, problem



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Want my generator on/off switch to illuminate only when generator is running FloridaCanuk RV Systems & Appliances 17 08-23-2018 05:43 PM
2006 Travel Supreme Select 500hp Cummins, 1200 ONAN generator generator d or will no Bev51 Travel Supreme Owner's Forum 4 06-13-2018 07:23 PM
Harbor Freight Predator 3500 Generator-backup Generator Meaney77 RV Systems & Appliances 5 03-13-2018 04:12 PM
Automatic generator start system/Generator/shoreline automatic changeover switc Rac912 RV Systems & Appliances 14 01-12-2016 12:51 PM
Military Generator INSIDE prepped Generator Area WorkRVing 5th Wheel Discussion 21 11-18-2015 07:00 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 04:58 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.