Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  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 07-17-2016, 08:57 AM   #1
thunderjet's Avatar
Join Date: Mar 2013
Location: winter in Fl. 34957 summer Mi.48755
Posts: 55
Onan Generator almost a big hot mess.

  • I was doing my once a month generator exercise. I started my 5.5 gas unit and was walking around rear of coach, when I saw gas dripping on the ground under the generator.

    Opening the door and removing gen set cover, I find unit covered with gas it is coming from the fuel filter on the carburetor. Leak is not at inlet or outlet but mid body where top is crimped on to lower half.

    If the unit was left running long enough to heat up, I am sure the gas would have lit off with a small explosion opening the snap on cover and basement door. If the blow out did not kill power to the gen fuel pump under the unit it could feed a possible fire. It is now 24 hours later and the more I think about how close to the garage, house gas meter and other flammable toys this was located. wow was I lucky.

    The interesting part to this story is a year ago, a new friend I met with the same 5.5 Onan gen had his in for service and the Onan tech told him that that filter is not needed as it is after the fuel pump. The tech told him to change it as "Onan" said it could be a problem. The friend and I are thinking the filter just plugs up. Friend buys a number of the replacement bypass parts designed by Onan. He gives me the part A029S253 and I tossed it in my parts bag.

    I am thinking this over maybe Onan had a recall I was not aware of because I don't think they would care if a filter plugged up, with enough concern to manufacture a part to eliminate the filter. And why would a filter plug up after the pump if there is a filter before the pump?

    The part, by the way worked and went on very easily.
    If you have this setup I would recommend the removal of the filter as I saw no sign of the problem coming.

    stay safe TJ

2005 Winnebago Adventurer 35A
Toad 2016 Equinox
W-22 GM 8.1 gas
thunderjet 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 07-17-2016, 09:01 AM   #2
thunderjet's Avatar
Join Date: Mar 2013
Location: winter in Fl. 34957 summer Mi.48755
Posts: 55
I found after posting, others have had fires due to this filter leaking.


2005 Winnebago Adventurer 35A
Toad 2016 Equinox
W-22 GM 8.1 gas
thunderjet is offline   Reply With Quote
Old 07-17-2016, 09:33 AM   #3
Senior Member
Join Date: May 2013
Location: Chester, VA
Posts: 601
Had the same experience last year. Bought the replacement part from Onan and no more problems.

The funny thing is the big Cummins Onan Center in Richmond didn't know what I was talking about. I had to do the research and give them the part number.
Tom and Gloria
2007 Itasca Suncruiser 35A, TOAD: 2015 GMC Canyon, Blue Ox Towbar, Baseplate and SMI Stay N Play
TomandGloria is offline   Reply With Quote
Old 07-17-2016, 09:50 AM   #4
Senior Member
Pete1985's Avatar
Join Date: Nov 2011
Location: Nation Wide Retired
Posts: 353
What year ?
2013 Duramax GMC 3500 4x4 Dually DIESEL 6.6L V8 TURBO
2014 H-D Electra Glide Ultra Limited
2014 Raptor 42ft Toy Hauler
Pete1985 is offline   Reply With Quote
Old 07-17-2016, 01:20 PM   #5
Senior Member
gruelens's Avatar
Join Date: Jul 2012
Posts: 1,074
I too had a Onan gas filter fail at the crimped seam and leak gasoline while running. Onan no longer recommends two gas filters for the gennys. Onan make a fitting that replaces the filter up near the carb. Then replace the lower gas filter with a new filter and you should be good to go. Note, pinch fuel line with vice grips, ahead of lower filter, when removing filter to avoid a flammable mess.
George R. - Fulltiming since January '03
2007 Newmar Mountain Aire 3991
2012 Chevy Malibu LT1
gruelens is offline   Reply With Quote
Old 07-26-2016, 12:02 PM   #6
thetabe49's Avatar
Join Date: Feb 2016
Posts: 35
onan rv generator 693NHEFA6753M

Generator just shut down. Motor has oil. Starter engages but will not turn the engine over,
thetabe49 is offline   Reply With Quote
Old 07-26-2016, 12:15 PM   #7
Senior Member
mrt_1111's Avatar

Fleetwood Owners Club
Ford Super Duty Owner
iRV2 No Limits Club
Join Date: Oct 2012
Location: Colorado Springs, CO
Posts: 709
Yep, onan did away with the downstream fuel filter a while back.
Mark Taylor
1999 Bounder 32H Ford V10, 2012 Ford Focus, Pretty DW, 2 cats. Retired USAF
mrt_1111 is offline   Reply With Quote
Old 07-26-2016, 12:27 PM   #8
Senior Member
Skip426's Avatar

Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 11,954
Originally Posted by thetabe49 View Post
Generator just shut down. Motor has oil. Starter engages but will not turn the engine over,

thetabe49 ; always best to start your own thread , if you problem isn't exactly the same as the original poster's; more members will see it; , most people only read the original post before responding .
What year of coach is the gen set in ?
Have you checked the battery connections ?

99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426 is offline   Reply With Quote

generator, onan

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
Anthem+Aqua Hot=Huge Mess+I'm the first? brianw8602 Entegra Owner's Forum 81 12-12-2015 07:45 PM
Cleaning the slide tops - big mess avoided mjeffrey MH-General Discussions & Problems 23 04-15-2015 02:39 PM
Almost No Hot Water to Shower golden RV Systems & Appliances 20 05-24-2012 12:55 PM
Almost there... Now it's either a Jayco Pinnacle or a Big Country boymom 5th Wheel Discussion 10 07-02-2011 12:08 PM
Onan EC-30 almost up and running Rob&Sue MH-General Discussions & Problems 2 07-03-2008 02:03 PM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:22 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.