| [GMCnet] Onan [message #25620] |
Fri, 24 October 2008 09:52  |
mwall
Messages: 7
Registered: March 2004
Karma: 0
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Junior Member |
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What exactly does the button next to my start/stop button on my Onan
interior panel do? I believe it is a primer button but I don't know
exactly how it functions nor how to use it. Am I supposed to hold it the
entire time I crank the engine or hold it for X seconds and then crank?
I checked my manuals but didn't see anything on this button. My manual
just shows the start/stop button and an hour meter and the Onan
maintenance manual doesn't mention it or I missed it.
Thanks,
Mark
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| Re: [GMCnet] Onan [message #25622 is a reply to message #25620] |
Fri, 24 October 2008 10:12  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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""What exactly does the button next to my start/stop button on my Onan
interior panel do? I believe it is a primer button but I don't know
exactly how it functions nor how to use it. Am I supposed to hold it the
entire time I crank the engine or hold it for X seconds and then crank?
I checked my manuals but didn't see anything on this button. My manual
just shows the start/stop button and an hour meter and the Onan
maintenance manual doesn't mention it or I missed it.""
Hi Mark--those buttons were not original equipment, but added by many owners. It is a primer button and really works well. You should push and hold it for 15 seconds or so before starting the Onan after it has been sitting for much more than a day.It back feeds 12V to the fuel pump. On mine I can hear the fuel pump come on, and when it quiets down, that means it has built up to pressure. Then I start the Onan and it fires right up.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Onan [message #25623 is a reply to message #25620] |
Fri, 24 October 2008 10:11 |
Marsh Wilkes
Messages: 155
Registered: January 2004
Karma: -3
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Senior Member |
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----- Original Message -----
From: "Wall, Mark" <mwall@FSC.Follett.com>
To: <gmclist@temp.gmcnet.org>
Sent: Friday, October 24, 2008 10:52 AM
Subject: [GMCnet] Onan
> What exactly does the button next to my start/stop button on my Onan
> interior panel do? I believe it is a primer button but I don't know
> exactly how it functions nor how to use it. Am I supposed to hold it the
> entire time I crank the engine or hold it for X seconds and then crank?
> I checked my manuals but didn't see anything on this button. My manual
> just shows the start/stop button and an hour meter and the Onan
> maintenance manual doesn't mention it or I missed it.
>
> Thanks,
>
> Mark
>
Hi Mark,
It's probably a prime button the PO added, if it still works it's a good
idea.
Have someone press the button while you have the Onan pulled out and are
listening for the fuel pump near the carburetor.
If all is well the pump should make a rapid clicking sound and then slow
when the fuel bowl is full. (assuming it was empty to begin with, after
sitting for days or more)
Probably 5 or 10 seconds would be good for priming.
Since the pump is activated during starting, it would be redundant to use
the button while starting.
I need to add a button, I hate having to crank the Onan for so long when it
has sat for weeks without use.
Marsh Wilkes
Perry Florida
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| Re: [GMCnet] Onan [message #25693 is a reply to message #25620] |
Sat, 25 October 2008 07:06 |
Steven Ferguson
Messages: 3447
Registered: May 2006
Karma: 0
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Senior Member |
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Open the side door, listen closely while pushing the button. Or, stand
back by the Onan while someone else pushes the button. You should
hear the fuel pump clicking. If not, you may have just dumped your
holding tanks.
On Fri, Oct 24, 2008 at 7:52 AM, Wall, Mark <mwall@fsc.follett.com> wrote:
> What exactly does the button next to my start/stop button on my Onan
> interior panel do? I believe it is a primer button but I don't know
> exactly how it functions nor how to use it. Am I supposed to hold it the
> entire time I crank the engine or hold it for X seconds and then crank?
> I checked my manuals but didn't see anything on this button. My manual
> just shows the start/stop button and an hour meter and the Onan
> maintenance manual doesn't mention it or I missed it.
>
> Thanks,
>
> Mark
> _______________________________________________
> GMCnet mailing list
> Gmclist@temp.gmcnet.org
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Steve Ferguson
'76 EII
Sierra Vista, AZ
Urethane bushing source
www.bdub.net/ferguson/
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| Re: [GMCnet] Onan [message #121009 is a reply to message #25620] |
Tue, 05 April 2011 20:46 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Recovery?
------Original Message------
From: Tim Conway
Sender: gmclist-bounces@temp.gmcnet.org
To: gmclist@temp.gmcnet.org
ReplyTo: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Onan
Sent: Apr 5, 2011 6:09 PM
On Apr 5, 2011, at 12:44 PM, Todd Sullivan wrote:
> You need to get the ONAN CONTROL BOARD OPERATION manual by Duane M.
> Simmons
> of the GMC WESTERN STATES MOTORHOME CLUB. I had a 6kw with a host of
> problems and this guy knows it all like the back of his hand. With his
> manual(and a couple of phone calls to him) I got my generator
> functioning
> perfectly. He only does the ONAN for GMC. Great guy and very helpful
He sure is! He helped me with my water system years ago. I hope his
recovery continues to go well.
Tim Conway
LI NY 78 PB
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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