Home » Public Forums » GMCnet » Onan fuel pump SOS
| Onan fuel pump SOS [message #216932] |
Sun, 04 August 2013 19:02  |
BRDRVR
Messages: 184
Registered: July 2013
Location: Clearwater, FL-Gerlach,NV
Karma: 8
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Senior Member |
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Got a 6kw. Its been running good but leaking a bit of oil so im gonna replace the adapter gasket and see if that does it. But my main problem that just started this morning is this. It will start up and as soon as you let go of the start button it stalls. I put a meter on the hot wire and it is energized when you are in starting mode but the power dies when released. I traced this wire around to the front of the motor behind the flywheel along with another from what looks to be the control board. The manual sez to jump the 9 to 11 and this will tell me if its the low oil shut down but it also mentions k3 maintains pump, coil and fuel solenoid. where should i start?
Also where is the best source for mufflers and starters for this machine?
Thanx. David
David Gourdine
http//www.blackrockdesertrvrental.com
booking@blackrockdesertrvrental.com
727-657-1955
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| Re: [GMCnet] Onan fuel pump SOS [message #216933 is a reply to message #216932] |
Sun, 04 August 2013 19:23  |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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You need the manual written by Duane Simmons. Find it/ print it/ keep it with you. I sure miss that guy :(. Someone here will post a link to it. All questions get answered.
Todd Sullivan
Sully
77 royale
Seattle
On Aug 4, 2013, at 5:02 PM, David Gourdine <booking@blackrockdesertrvrental.com> wrote:
>
>
> Got a 6kw. Its been running good but leaking a bit of oil so im gonna replace the adapter gasket and see if that does it. But my main problem that just started this morning is this. It will start up and as soon as you let go of the start button it stalls. I put a meter on the hot wire and it is energized when you are in starting mode but the power dies when released. I traced this wire around to the front of the motor behind the flywheel along with another from what looks to be the control board. The manual sez to jump the 9 to 11 and this will tell me if its the low oil shut down but it also mentions k3 maintains pump, coil and fuel solenoid. where should i start?
> Also where is the best source for mufflers and starters for this machine?
> Thanx. David
> --
> David Gourdine
> www.blackrockdesertrvrental.com
> booking@blackrockdesertrvrental.com
> 727-657-1955
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: Onan fuel pump SOS [message #216939 is a reply to message #216932] |
Sun, 04 August 2013 19:38 |
BRDRVR
Messages: 184
Registered: July 2013
Location: Clearwater, FL-Gerlach,NV
Karma: 8
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Senior Member |
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thanx todd. got 8 of them and they all seem to be have similar issues. prob also need source for the flywheel seal too.
thanx again
David Gourdine
http//www.blackrockdesertrvrental.com
booking@blackrockdesertrvrental.com
727-657-1955
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| Re: [GMCnet] Onan fuel pump SOS [message #216940 is a reply to message #216933] |
Sun, 04 August 2013 19:34 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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For parts you can start at our site as there is only a handful that we do
not carry, We will tell you where you can get them .
On Sun, Aug 4, 2013 at 5:23 PM, Todd Sullivan <sgltrac@gmail.com> wrote:
> You need the manual written by Duane Simmons. Find it/ print it/ keep it
> with you. I sure miss that guy :(. Someone here will post a link to it. All
> questions get answered.
>
> Todd Sullivan
>
> Sully
> 77 royale
> Seattle
>
> On Aug 4, 2013, at 5:02 PM, David Gourdine <
> booking@blackrockdesertrvrental.com> wrote:
>
> >
> >
> > Got a 6kw. Its been running good but leaking a bit of oil so im gonna
> replace the adapter gasket and see if that does it. But my main problem
> that just started this morning is this. It will start up and as soon as you
> let go of the start button it stalls. I put a meter on the hot wire and it
> is energized when you are in starting mode but the power dies when
> released. I traced this wire around to the front of the motor behind the
> flywheel along with another from what looks to be the control board. The
> manual sez to jump the 9 to 11 and this will tell me if its the low oil
> shut down but it also mentions k3 maintains pump, coil and fuel solenoid.
> where should i start?
> > Also where is the best source for mufflers and starters for this machine?
> > Thanx. David
> > --
> > David Gourdine
> > www.blackrockdesertrvrental.com
> > booking@blackrockdesertrvrental.com
> > 727-657-1955
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Onan fuel pump SOS [message #216942 is a reply to message #216940] |
Sun, 04 August 2013 19:41 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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If it does not show, go
to appliedgmc.com We will help you figure it out, as we are a Onan Dealer
as well as GMC MH parts and kit supplier.
Should we not be able to assist you, we will refer you to those that know
more and they will spend as much time as necessary, as we all refer one
another for help.
On Sun, Aug 4, 2013 at 5:34 PM, Jim Kanomata <jimkanomata@gmail.com> wrote:
> For parts you can start at our site as there is only a handful that we do
> not carry, We will tell you where you can get them .
>
>
> On Sun, Aug 4, 2013 at 5:23 PM, Todd Sullivan <sgltrac@gmail.com> wrote:
>
>> You need the manual written by Duane Simmons. Find it/ print it/ keep it
>> with you. I sure miss that guy :(. Someone here will post a link to it. All
>> questions get answered.
>>
>> Todd Sullivan
>>
>> Sully
>> 77 royale
>> Seattle
>>
>> On Aug 4, 2013, at 5:02 PM, David Gourdine <
>> booking@blackrockdesertrvrental.com> wrote:
>>
>> >
>> >
>> > Got a 6kw. Its been running good but leaking a bit of oil so im gonna
>> replace the adapter gasket and see if that does it. But my main problem
>> that just started this morning is this. It will start up and as soon as you
>> let go of the start button it stalls. I put a meter on the hot wire and it
>> is energized when you are in starting mode but the power dies when
>> released. I traced this wire around to the front of the motor behind the
>> flywheel along with another from what looks to be the control board. The
>> manual sez to jump the 9 to 11 and this will tell me if its the low oil
>> shut down but it also mentions k3 maintains pump, coil and fuel solenoid.
>> where should i start?
>> > Also where is the best source for mufflers and starters for this
>> machine?
>> > Thanx. David
>> > --
>> > David Gourdine
>> > www.blackrockdesertrvrental.com
>> > booking@blackrockdesertrvrental.com
>> > 727-657-1955
>> > _______________________________________________
>> > GMCnet mailing list
>> > Unsubscribe or Change List Options:
>> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: Onan fuel pump SOS [message #216949 is a reply to message #216932] |
Sun, 04 August 2013 20:02 |
BRDRVR
Messages: 184
Registered: July 2013
Location: Clearwater, FL-Gerlach,NV
Karma: 8
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Senior Member |
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Thx guys. will let you know how it comes out. jim i will give you a call tomorrow and go over the parts list i know i need now.
David Gourdine
http//www.blackrockdesertrvrental.com
booking@blackrockdesertrvrental.com
727-657-1955
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| Re: [GMCnet] Onan fuel pump SOS [message #216966 is a reply to message #216949] |
Sun, 04 August 2013 20:45 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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David,
We spend time with our customers to make sure they get the most from the
purchase.
We service over4k GMC customers, and got that way by communicating on the
phone and taking active part in the GMC Community.
We over designed and over built a kit that was simulated and learned from
them that when your the first to introduce a part, you need to not rush it
and have so much into it to make people think we over charged people.
There is more to that, but you learn.
On Sun, Aug 4, 2013 at 6:02 PM, David Gourdine <
booking@blackrockdesertrvrental.com> wrote:
>
>
> Thx guys. will let you know how it comes out. jim i will give you a call
> tomorrow and go over the parts list i know i need now.
>
> --
> David Gourdine
> www.blackrockdesertrvrental.com
> booking@blackrockdesertrvrental.com
> 727-657-1955
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Onan fuel pump SOS [message #217000 is a reply to message #216932] |
Mon, 05 August 2013 07:36 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Well, there's a little winding on the alternator which produces voltage whaen the set is running to hold K3 in and power the fuel pump and ignition. Jumping 9 to 11 bypasses all this and puts voltage on the pump and coil. If the set runs properly when this jumper is in place, your problem is likely in the engine control card and/or its associated wiring. >Often< what happens is the connections to the card vibrate till the solder connection(s) break and become intermittent. Also, the components on the card can fail, as can the oil pressure sensor.
First test is to see if it runs with the jumoper. If not, look for a bad fuel pump or loose wire. If so, carefully remove the control card (Disconnect it at the white square Molex <tm> connector, not by the blade connectors on the card itself). Inspect the card, looking particularly for cracks and burint spots on the circuit runs, and where the connectors for the wires solder to the card. Cracks here will lead to intermittent operation or no operation at all. I take two pair of chain niose pliers and seperate the wires at the connectors, then 'a 'solder schluroper' and remove the solder where the connectors are crimped to the card. I tin a piece of stranded wire and crimp it through the connector mount hole onto the connector base, and out on the cicuit run, then flow solder on it. This gives a mechanical connection which can give just a bit and a good electrical connection.
If you look on Bdub's site, you can find the 4KW circuit card circuit put up by Ken Henderson which has ECG replacement numbers for the parts on the card. iIt is identical to the 6KW control card. Suspect the big caacitor, and if it's leaky orbad, check the diodes as well.
--johnny
'76 23' transmode norris
'76 palm beach
--------------------------------------------
On Mon, 8/5/13, David Gourdine <booking@blackrockdesertrvrental.com> wrote:
Subject: [GMCnet] Onan fuel pump SOS
To: gmclist@temp.gmcnet.org
Date: Monday, August 5, 2013, 12:02 AM
Got a 6kw. Its been running good but leaking a bit of oil so
im gonna replace the adapter gasket and see if that does it.
But my main problem that just started this morning is this.
It will start up and as soon as you let go of the start
button it stalls. I put a meter on the hot wire and it is
energized when you are in starting mode but the power dies
when released. I traced this wire around to the front of the
motor behind the flywheel along with another from what looks
to be the control board. The manual sez to jump the 9 to 11
and this will tell me if its the low oil shut down but it
also mentions k3 maintains pump, coil and fuel solenoid.
where should i start?
Also where is the best source for mufflers and starters for
this machine?
Thanx. David
--
David Gourdine
www.blackrockdesertrvrental.com
booking@blackrockdesertrvrental.com
727-657-1955
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: Onan fuel pump SOS [message #217061 is a reply to message #216932] |
Mon, 05 August 2013 13:30 |
BRDRVR
Messages: 184
Registered: July 2013
Location: Clearwater, FL-Gerlach,NV
Karma: 8
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Senior Member |
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jumped 9 to 11 and she started right up. pulled the jumper and she died. Spoke with jimk and he sez he has a control board for me. going thru the other 7 gennys to check out their status and then goingdown to fremont to pick up all my needed parts. todays job is to replace all the adaptor gaskets. im heading down to napa now(71miles each way) to grab some gasket material. does any one know the napa part number for the oil sending unit?
David Gourdine
http//www.blackrockdesertrvrental.com
booking@blackrockdesertrvrental.com
727-657-1955
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| Re: Onan fuel pump SOS [message #217063 is a reply to message #216932] |
Mon, 05 August 2013 13:49 |
BRDRVR
Messages: 184
Registered: July 2013
Location: Clearwater, FL-Gerlach,NV
Karma: 8
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Senior Member |
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bob from cincinatti called me with them. thanx bob
Napa#s
OP6074
OP6075
OP6282
David Gourdine
http//www.blackrockdesertrvrental.com
booking@blackrockdesertrvrental.com
727-657-1955
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| Re: Onan fuel pump SOS [message #217109 is a reply to message #217061] |
Tue, 06 August 2013 00:36 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| BRDRVR wrote on Mon, 05 August 2013 13:30 |
jumped 9 to 11 and she started right up. pulled the jumper and she died. Spoke with jimk and he sez he has a control board for me. going thru the other 7 gennys to check out their status and then goingdown to fremont to pick up all my needed parts. todays job is to replace all the adaptor gaskets. im heading down to napa now(71miles each way) to grab some gasket material. does any one know the napa part number for the oil sending unit?
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I did not read this entire thread. So if this is a duplicate then I'm sorry.
Jumpering Pins 9 to pins 11 does NOT necessarily say that you have a bad board. Chances are good that the board is bad BUT.....
The board energizes the fuel pump and the ignition based on several inputs to the board. Only after checking ALL of the inputs can you definitively say the board is bad. So if you want to throw a board at it, I would say you probably have a 75% chance of fixing it. If after throwing a board at it, the Onan still doesn't run, then you will have to check the inputs (and maybe the fuse) to find the real problem.
The inputs off of the top of my head are +12, -12, oil pressure switch, and 28 to 30 VAC coming from the on board alternator, Also the alternator voltage regulator can cause your problem.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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