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 05-13-2011, 11:25 PM   #1
Senior Member
 
Join Date: Apr 2011
Posts: 120
Anyone know where to get aftermarket fuel pump for gas Onan

Hello all,

I see there is lots of talk about gas Onan Marquis Gold generators. I have a 5500 unit that is shutting off intermittently. Have found it isnt getting fuel when it does shut down and the fuel pump doesnt appear to be running when switched to prime (by sound, feel, or checking bowl drain).

Unit will restart after a while and could run for another 3 minutes, or 2 hours. Just never know. Always shuts off the same way, choppy, cutting out like its starving for fuel.

Anyone know of a drop in replacement fuel pump that would work for this application besides an Onan unit?

Thanks!
Chris
__________________

__________________
HoRotica 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 05-14-2011, 01:32 AM   #2
Senior Member
 
Join Date: Sep 2009
Posts: 180
Be careful. I had the same fuel pump problem and the Onan replacement part ($90.00) had a problem also. Seems Onan used an alternative supplier (read China) and it had an internal seal problem that cause your symptoms. The seal would swell with temp and stop the pump from working. I don't know of an alternate pump but have been warned about using an automotive type pump because of pressure.
__________________

__________________
bjsheldon is offline   Reply With Quote
Old 05-14-2011, 01:33 AM   #3
Senior Member
 
Join Date: Sep 2009
Posts: 180
I forgot. Have you checked the filter and fuel line for blockage before you spend your money on a fuel pump?
__________________
bjsheldon is offline   Reply With Quote
Old 05-14-2011, 08:13 AM   #4
Senior Member
 
Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 4,383
I don't remember if the gold used the vane type pump or not. (Sometimes being 71 just sucks) If it uses the old marquis vane pump, you can dissassemble the pump and clean the vanes. Onan called for a filter BEFORE the pump. However 95% of the MH manuf. installed one after the pump. Small pieces of rust get caught in the vanes and cause the vanes to stick. Try installing a filter before the pump and cleaning the pump. If you install a new pump, you must be certain it is the right press. I believe the old pumps were 2 and 1/2 lbs.
__________________
ga traveler is offline   Reply With Quote
Old 05-14-2011, 09:01 AM   #5
Senior Member
 
BeltoneMagoo's Avatar
 
Monaco Owners Club
Join Date: Mar 2011
Location: Texas
Posts: 400
You might try Generator parts, Generac, Kohler, Onan | Kim Hotstart heaters, Sensaphone, Freeze Alarm, LG / LS contactors. They have discount prices on most items and I think they can get most of what you may need when they don't have it in stock.
Good luck!
__________________
BeltoneMagoo is offline   Reply With Quote
Old 05-14-2011, 10:47 AM   #6
Senior Member
 
Join Date: Apr 2011
Posts: 120
Quote:
Originally Posted by bjsheldon View Post
I forgot. Have you checked the filter and fuel line for blockage before you spend your money on a fuel pump?
No buzz, no humm, no evidence of the pump running when I hit the prime button after it shuts off like it does before it shuts down.

Chris
__________________
HoRotica is offline   Reply With Quote
Old 05-14-2011, 10:49 AM   #7
Senior Member
 
Join Date: Apr 2011
Posts: 120
Quote:
Originally Posted by ga traveler View Post
I don't remember if the gold used the vane type pump or not. (Sometimes being 71 just sucks) If it uses the old marquis vane pump, you can dissassemble the pump and clean the vanes. Onan called for a filter BEFORE the pump. However 95% of the MH manuf. installed one after the pump. Small pieces of rust get caught in the vanes and cause the vanes to stick. Try installing a filter before the pump and cleaning the pump. If you install a new pump, you must be certain it is the right press. I believe the old pumps were 2 and 1/2 lbs.
Thanks,

This does have the filter both before and after the pump. Pump is round and looks like an inline fuel filter itself. I had read somewhere else they were in the 2 psi range. Most of the cheapie automotive pumps are 5 psi.

Chris
__________________
HoRotica is offline   Reply With Quote
Old 05-14-2011, 10:52 AM   #8
Senior Member
 
Join Date: Apr 2011
Posts: 120
Quote:
Originally Posted by bjsheldon View Post
Be careful. I had the same fuel pump problem and the Onan replacement part ($90.00) had a problem also. Seems Onan used an alternative supplier (read China) and it had an internal seal problem that cause your symptoms. The seal would swell with temp and stop the pump from working. I don't know of an alternate pump but have been warned about using an automotive type pump because of pressure.
That is my exact concern, that the replacement pump is the same pile o junk that the original could be. I did put a fan on the generator with the cover off to see if it made a difference to it shutting off. Did not seem like it did but I did not have the fan pointed right at the pump either...

Chris
__________________
HoRotica is offline   Reply With Quote
Old 05-14-2011, 11:40 AM   #9
Member
 
Join Date: Jan 2010
Posts: 48
Put a clear tub on after the pump to see if it is getting air. if so the gas line has a hole or leak. I had to change the gas line from the gas tank. Cut a hole in floor so I could get to it, top of gas tank. Could be a lose wire.
__________________

__________________
National Dolphin 35Ft. 1995 slide Ford 460
Banks SYSTEM Best thing I did. 6.5 MPG at 65MPH with toad.
gary peterso is offline   Reply With Quote
Reply



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
Help Identifying Issue: Fuel Pump or Ignition? BBear Ford Motorhome Chassis Forum 23 02-23-2011 03:18 PM
ISB Fuel Pump -Transfer Pump Roadwander Cummins Engines 12 08-08-2009 10:31 PM
Anyone change generator fuel hose from tank to fuel pump? vacation on wheels MH-General Discussions & Problems 4 07-19-2009 09:39 PM
Mysterious engine shutdown and Chinese fuel pump (sorry, long story) classic60 Workhorse and Chevrolet Chassis Motorhome Forum 36 07-15-2009 02:16 PM
Fuel pump power supply dmodrall Workhorse and Chevrolet Chassis Motorhome Forum 3 06-24-2009 11:06 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:13 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.