Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
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 07-17-2010, 05:44 PM   #1
Junior Member
 
Join Date: Apr 2009
Posts: 19
generator only runs when i hold the start button on

on a propane onan 6.3kw genny in a 1994 safari sahara 34'. it will start and run for about 2-3 seconds then die, but if i hold the starter on is will keep running. i just changed the oil and its full, changed the plugs gapped to .024'', changed the air filter, should be good to go right... its not and we are trying to get out of town tomorrow!!! we ran the unit about a month ago and 3 hrs into our trip it would load up and stop making electricity, but it would keep running very rough. it would cycle elect on, then of, then on, then off from 3-5 munites each time. luckily we had a back up on the trailer so we connected it and just ran with it, honda good, onan bad!

need some HELP!!!!
__________________

__________________
JDKing 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 07-17-2010, 06:25 PM   #2
Senior Member
 
Bob86ZZ4's Avatar
 
Join Date: Feb 2009
Location: St. Paul, MN
Posts: 383
It sounds very similar to a problem I had on an Onan 4k gas in my old mh. I took it to a good generator guy and he tracked it down to a bad rotor. He said it wasn't generating a/c. It would start and die because there is something that kills it if it isn't making a/c I guess. At least that's the way I understood him. I could keep it running by holding on the start button. But it still wouldn't make a/c. He put a new rotor in and it worked great until I sold it a few years later. The rotor is a very expensive part. I hope it's not your problem. It's not the rotor in the distributor. It's a big round thing that spins to generate the a/c voltage. Good luck.
__________________

__________________
www.bobwinsor.com
MN is home for now.
Bob86ZZ4 is offline   Reply With Quote
Old 07-17-2010, 06:37 PM   #3
Registered User
 
Join Date: Dec 2006
Location: Traveling the lower 48
Posts: 2,450
You might want to check the fuel regulator. I had a similar problem with a similar propane generator (the worst possible fuel source from my previous experience) and if you hit the regulator with the end of a broom stick (the only thing I could find that would reach) it would run until the next time you started it. The dealer replaced the regulator and it run just fine after that.
__________________
Bill Adams is offline   Reply With Quote
Old 07-17-2010, 08:58 PM   #4
Senior Member
 
stubeje's Avatar
 
Workhorse Chassis Owner
Join Date: Oct 2007
Posts: 152
My uncles DS did the same thing...there is a small control board on the Gen. that draws moisture and corrosion will form on the traces (back of board) which shorts out the "run" funtion. As long as you hold the "start" button it would run. I just un plugged the board, cleaned the corrosion off the back with alcohol and a tooth brush and re-installed...walla...generator starts and runs fine now. His was an LP Onan also.
__________________
Newmar Kountry Star 2005 37'

8.1 Workhorse w/UltraPower,Taylor 409 plug wires,AC Delco 41-993 Plugs and OEM Engineering Fuel Filter Adaper
stubeje is offline   Reply With Quote
Old 07-18-2010, 08:58 AM   #5
Junior Member
 
Join Date: Apr 2009
Posts: 19
Quote:
Originally Posted by stubeje View Post
My uncles DS did the same thing...there is a small control board on the Gen. that draws moisture and corrosion will form on the traces (back of board) which shorts out the "run" funtion. As long as you hold the "start" button it would run. I just un plugged the board, cleaned the corrosion off the back with alcohol and a tooth brush and re-installed...walla...generator starts and runs fine now. His was an LP Onan also.

pulled it off this morning and its filled with a clear rubber, no way to clean it.

dont know how to check the rotor, and the regulator is working.
__________________
JDKing is offline   Reply With Quote
Old 07-18-2010, 09:41 AM   #6
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 18,104
The start switch bypasses a couple safety cutoffs, particularly the "no oil pressure' and "no AC output" cutoffs, so check those if you can. It also primes the fuel pump, so it could be the normal power to the genset fuel pump isn't working.
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
Gary RVRoamer is online now   Reply With Quote
Old 07-18-2010, 10:21 AM   #7
Junior Member
 
Join Date: Apr 2009
Posts: 19
Quote:
Originally Posted by RV Roamer [Gary] View Post
The start switch bypasses a couple safety cutoffs, particularly the "no oil pressure' and "no AC output" cutoffs, so check those if you can. It also primes the fuel pump, so it could be the normal power to the genset fuel pump isn't working.
i looked for the low oil pressure switch bu couldnt find anything on the motor, everything is very tight in there.
__________________
JDKing is offline   Reply With Quote
Old 07-18-2010, 12:25 PM   #8
Junior Member
 
Join Date: Jun 2010
Posts: 13
Had the same problem several weeks ago cleaned the comutator rings with scotch brite on a thin stick (Removed the brush holder) and diconnected spark plugs :-) used starter to rotate
__________________
Rodney T is offline   Reply With Quote
Old 07-18-2010, 01:07 PM   #9
Senior Member
 
RandyKathyM's Avatar
 
Fleetwood Owners Club
Workhorse Chassis Owner
Join Date: May 2009
Posts: 191
Another thing to look for, will it run if you hold the throttle open a little by hand? If so I had a Onan 7000 on my 04 Bounder that shutdown and would restart and run for a min or less and shut down again. The linkage to the governor has a plastic clip that was flaky and the linkage came out. If yours is anything like a gas 7000 this is accessiable from a square access hole in the top of the enclosure.
__________________
RandyKathyM is offline   Reply With Quote
Old 07-21-2010, 09:27 PM   #10
Junior Member
 
Join Date: Apr 2009
Posts: 19
will not run by holding the throttle open... tried that. i will try and see if i can get the brushes out and clean the commutator ring a majig... but i did drive it 2 hrs to and from yogi with no a/c!!! windows open, it was HOT!!!!! the things we will do for our family...
__________________
JDKing is offline   Reply With Quote
Old 07-22-2010, 05:46 AM   #11
Junior Member
 
Join Date: Jun 2010
Posts: 13
Just an added note I didn't see mentioned
There is a oil pressure switch that shuts it down if no oil pressure a clip lead across it is a quick check

On my gen it is next to the oil filter, I had to remove a cover that only allowed the filter to fit to get to it

I have had Mr murphy aboard after I got the gen running &*@&^%!# (I am now waiting for the delivery of a new Transfer Switch :-)
__________________
Rodney T is offline   Reply With Quote
Old 07-22-2010, 07:23 AM   #12
Senior Member
 
RJay's Avatar
 
Newmar Owners Club
Join Date: Jan 2010
Posts: 4,589
A faulty voltage regulator will cause the problem your have. If it's not the regulator it's the control board.
__________________
2007 Newmar DSDP 4023
Discovery is seeing what everyone else has seen and thinking what no one else has thought.
If you want to see what man made go East; if you want to see what God made go West.
RJay is offline   Reply With Quote
Old 07-22-2010, 11:48 AM   #13
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,832
A few years ago in Quartsite AZ some friends of mine, who were parked next to me, had just that happen.. The blink code was "Low batteries or not cranking fast enough"

Turns out the brushes had worn out on the generator and since the Onan was NOT detecting 120vac out.. It simply shut down (I mean why waste gas if you are not generating power)


Thankfully for them they were parked next to a couple of part time 30 amp outlets (MY RIG) so they had power whenever MY generator was running.

But.. Still.... That is one very expensive (I might add) option.

I will point out it is one on a long list.. Since I don't know the rest of the list, which includes among other things the oil level sensor... I won't even try to list it.
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 07-23-2010, 02:25 PM   #14
Senior Member
 
Damon Owners Club
Join Date: Jun 2006
Location: Middletown,OH
Posts: 183
Quote:
Originally Posted by RJay View Post
A faulty voltage regulator will cause the problem your have. If it's not the regulator it's the control board.
I vote for this response, was the problem that I had. bad VR (diode) set blown on the regulator. I replaced the diode set and all was good again.

cheers
__________________

__________________
Dave

Callsign: KD8W
hamdave 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
When gasoline runs out 50 kw Gulf Stream Owner's Forum 13 07-09-2009 09:56 PM
Will it start ???? Chickadee Newmar Owner's Forum 10 05-11-2009 06:45 PM
Onan Generator Quits On Start With No Load Birddog Pilot Alpine Coach Owner's Forum 26 08-11-2008 11:49 AM
Generator won't start. Name Pending Fleetwood Products Owner's Forum 10 05-17-2008 02:20 PM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:13 AM.


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