Home » Public Forums » GMCnet » [GMCnet] I give up. (Onan)
| [GMCnet] I give up. (Onan) [message #187867] |
Sun, 21 October 2012 14:31  |
Robin Hood
Messages: 1078
Registered: April 2011
Karma: 3
|
Senior Member |
|
|
I'm taking this thing to the shop. board shows 5-7 volts across the various
terminals when cranking where there should be 10 or more volts. This is
with my battery charger in full on 50 amp starting mode, with 16 volts at
the battery terminals and at the connections coming into the Onan. Pump
doesn't appear to be doing anything. Spraying ether into the carb does
nothing. There are no visible sparks at the points or plugs. Contact
cleaner did not help. I have RTFMd, WTFVd, and read everything I could
online.
Know when to walk away, know when to run.
This is beyond anything I can do myself. I'm just gonna have to point the
Money Gun at the problem.
Question: what's a brand new commercial off the shelf currently available
replacement for our Onans? I have two coaches and one Onan that may or may
not ever work again, so I gotta get at least one replacement.
--
Robin Hood
Jackson, MS
2003 Buick Lesabre
1968 Pontiac Catalina
1978 GMC Royale motorhome
1977 GMC Palm Beach motorhome
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187869 is a reply to message #187867] |
Sun, 21 October 2012 14:38  |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Don't give up on it.
We have helped bunch of people solve problems without taking all those
readings.
Try junping 5-9 nd see what that does , then call me on our toll free line.
On Sun, Oct 21, 2012 at 12:31 PM, Robin Hood <loxley@gmail.com> wrote:
> I'm taking this thing to the shop. board shows 5-7 volts across the various
> terminals when cranking where there should be 10 or more volts. This is
> with my battery charger in full on 50 amp starting mode, with 16 volts at
> the battery terminals and at the connections coming into the Onan. Pump
> doesn't appear to be doing anything. Spraying ether into the carb does
> nothing. There are no visible sparks at the points or plugs. Contact
> cleaner did not help. I have RTFMd, WTFVd, and read everything I could
> online.
>
> Know when to walk away, know when to run.
>
> This is beyond anything I can do myself. I'm just gonna have to point the
> Money Gun at the problem.
>
> Question: what's a brand new commercial off the shelf currently available
> replacement for our Onans? I have two coaches and one Onan that may or may
> not ever work again, so I gotta get at least one replacement.
>
>
> --
> Robin Hood
> Jackson, MS
> 2003 Buick Lesabre
> 1968 Pontiac Catalina
> 1978 GMC Royale motorhome
> 1977 GMC Palm Beach motorhome
> _______________________________________________
> 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
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187870 is a reply to message #187867] |
Sun, 21 October 2012 14:45 |
kerry pinkerton
Messages: 2565
Registered: July 2012
Location: Harvest, Al
Karma: 15
|
Senior Member |
|
|
Buying a new board first would be cheaper than paying for some guy to look at it and tell you that your board is bad. Jim K has them rebuilt for a hundred bucks.
Kerry Pinkerton - North Alabama
Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187872 is a reply to message #187869] |
Sun, 21 October 2012 14:48 |
Robin Hood
Messages: 1078
Registered: April 2011
Karma: 3
|
Senior Member |
|
|
Thanks Jim. I've been messing with this thing for WEEKS now, off and
on. Jumping 9 and 5 causes a solenoid just upstream of the fuel pump
to click, and that's it. Pump does nothing.
I've tried everything I can think of and read all I could, but it's
just beyond me. :(
On Sun, Oct 21, 2012 at 2:38 PM, Jim Kanomata <jimkanomata@gmail.com> wrote:
> Don't give up on it.
> We have helped bunch of people solve problems without taking all those
> readings.
> Try junping 5-9 nd see what that does , then call me on our toll free line.
>
> On Sun, Oct 21, 2012 at 12:31 PM, Robin Hood <loxley@gmail.com> wrote:
>
>> I'm taking this thing to the shop. board shows 5-7 volts across the various
>> terminals when cranking where there should be 10 or more volts. This is
>> with my battery charger in full on 50 amp starting mode, with 16 volts at
>> the battery terminals and at the connections coming into the Onan. Pump
>> doesn't appear to be doing anything. Spraying ether into the carb does
>> nothing. There are no visible sparks at the points or plugs. Contact
>> cleaner did not help. I have RTFMd, WTFVd, and read everything I could
>> online.
>>
>> Know when to walk away, know when to run.
>>
>> This is beyond anything I can do myself. I'm just gonna have to point the
>> Money Gun at the problem.
>>
>> Question: what's a brand new commercial off the shelf currently available
>> replacement for our Onans? I have two coaches and one Onan that may or may
>> not ever work again, so I gotta get at least one replacement.
>>
>>
>> --
>> Robin Hood
>> Jackson, MS
>> 2003 Buick Lesabre
>> 1968 Pontiac Catalina
>> 1978 GMC Royale motorhome
>> 1977 GMC Palm Beach motorhome
>> _______________________________________________
>> 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
--
Robin Hood
Jackson, MS
2003 Buick Lesabre
1968 Pontiac Catalina
1978 GMC Royale motorhome
1977 GMC Palm Beach motorhome
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187875 is a reply to message #187872] |
Sun, 21 October 2012 15:23 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
|
Senior Member |
|
|
Robin,
You can eliminate that solenoid valve, though since it's working, that
should not be your problem. The fuel pump is easy to disassemble and clean
-- removing the twist lock cap on the bottom is pretty much all you have to
do to open it. Wash it out with carb cleaner and chances are it will work.
But for testing, you could just set a gas can on a ladder and use siphon
feed.
Don't give up too easily. :-)
Ken H.
On Sun, Oct 21, 2012 at 3:48 PM, Robin Hood <loxley@gmail.com> wrote:
> Thanks Jim. I've been messing with this thing for WEEKS now, off and
> on. Jumping 9 and 5 causes a solenoid just upstream of the fuel pump
> to click, and that's it. Pump does nothing.
>
> I've tried everything I can think of and read all I could, but it's
> just beyond me. :(
>
> On Sun, Oct 21, 2012 at 2:38 PM, Jim Kanomata <jimkanomata@gmail.com>
> wrote:
> > Don't give up on it.
> > We have helped bunch of people solve problems without taking all those
> > readings.
> > Try junping 5-9 nd see what that does , then call me on our toll free
> line.
> >
> > On Sun, Oct 21, 2012 at 12:31 PM, Robin Hood <loxley@gmail.com> wrote:
> >
> >> I'm taking this thing to the shop. board shows 5-7 volts across the
> various
> >> terminals when cranking where there should be 10 or more volts. This is
> >> with my battery charger in full on 50 amp starting mode, with 16 volts
> at
> >> the battery terminals and at the connections coming into the Onan. Pump
> >> doesn't appear to be doing anything. Spraying ether into the carb does
> >> nothing. There are no visible sparks at the points or plugs. Contact
> >> cleaner did not help. I have RTFMd, WTFVd, and read everything I could
> >> online.
> >>
> >> Know when to walk away, know when to run.
> >>
> >> This is beyond anything I can do myself. I'm just gonna have to point
> the
> >> Money Gun at the problem.
> >>
> >> Question: what's a brand new commercial off the shelf currently
> available
> >> replacement for our Onans? I have two coaches and one Onan that may or
> may
> >> not ever work again, so I gotta get at least one replacement.
> >>
> >>
> >> --
> >> Robin Hood
> >> Jackson, MS
> >> 2003 Buick Lesabre
> >> 1968 Pontiac Catalina
> >> 1978 GMC Royale motorhome
> >> 1977 GMC Palm Beach motorhome
> >> _______________________________________________
> >> 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
>
>
>
> --
> Robin Hood
> Jackson, MS
> 2003 Buick Lesabre
> 1968 Pontiac Catalina
> 1978 GMC Royale motorhome
> 1977 GMC Palm Beach motorhome
> _______________________________________________
> 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
Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187879 is a reply to message #187872] |
Sun, 21 October 2012 16:07 |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
|
Senior Member |
|
|
| Robin Hood wrote on Sun, 21 October 2012 15:48 |
Thanks Jim. I've been messing with this thing for WEEKS now, off and on. Jumping 9 and 5 causes a solenoid just upstream of the fuel pump to click, and that's it. Pump does nothing.
I've tried everything I can think of and read all I could, but it's
just beyond me. 
--
Robin Hood
|
Robin,
You are obviously literate and have an IQ well over 80 - Therefore, you are very probably more capable than anybody you will be paying to work on this. (One of my standard lines..)
Now, you may just have done your diagnosis in the line above.
The fuel system has three(3) parts.. the fuel pump (big cylindrical thing with fittings in sides above and below and electrical connection. The solenoid valve is much smaller and typically between the pump and the carburetor. It has its fittings in the ends.
The solenoid valve should click once and once only when you put the jumper in place.
The pump will click continuously - if it is working.
You may not even hear the solenoid. It is not very pronounced. But the pump is easy to hear.
If the pump is not cycling, it could easily be the internal contacts. They are easy to clean and I am sure someone has written this job up for the GMC people somewhere.
If it is cycling, loosen the fitting at the carburetor (real PITA to get at) and see if fuel is leaking out with the jumper on.
- If Not, your problem is in the fuel system nearby.
- If It is, the problem is now the ignition or the carburetor.
Test the ignition.
Pull one spark plug cap, put a screw driver into the cap and arrange it so it is near metal like 1/8" or so. Put the jumper back on and hit the start button.
Did you see a spark?
- If not, clean the points and try again.
- If yes, the problem is in the carburetor.
That may just need cleaning.
Let us know before you spend money.
If given minimum care, these things are anvil reliable and so easy to take good care of that it is awesome (in the true sense).
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187883 is a reply to message #187879] |
Sun, 21 October 2012 16:53 |
Robin Hood
Messages: 1078
Registered: April 2011
Karma: 3
|
Senior Member |
|
|
Yeah, well, I'd take an experienced idiot over a neophyte genius most
of the time.
Fuel line solenoid clicks once and that's it. Pump doesn't make a sound.
I have the best wife ever. I'm so frustrated (with myself and my
inability to troubleshoot this thing) right now I could just chew
nails. So she's cooking me a steak and a baked potato. She's great.
Maybe part of the problem is the fact that to work on the danged thing
I've got to drive 20 miles to Mom's house and work on it using
whatever I remembered to bring with me and without better Net access
than my iphone. In the hot weather and bugs. (I keep the Onan under a
car cover under the carport).
My thinking with leaving it in Mom's carport was that it was going to
hopefully be a quick fix, and the coaches are stored only a mile away,
so there were going to be logistical advantages. However, now that I
can see that the Onan is not going to go gently into that good night,
I can see now that I need to establish a proper shop environment. Full
access to all my tools, access to my cameras and video editing, hell
even Skype if Jim K wanted to watch me as I walk through
troubleshooting.
I'm going to put my 68 Pontiac in the driveway and give the Onan her
spot inside the garage here at my house. Wife is opposed to this idea;
there's a bad patch of paint on the hood with some surface rust and
barely any weather-stripping to speak of, so she doesn't want me to
leave it outside. With luck, and working on it every day after work,
and having easy access to tools and no bugs, maybe I can get it fixed
in a couple of weeks. Maybe.
I need a dang Bat Cave is what I need. With a lift and a service pit.
On Sun, Oct 21, 2012 at 4:07 PM, Matt Colie <matt7323tze@gmail.com> wrote:
>
> Robin,
>
> You are obviously literate and have an IQ well over 80 - Therefore, you are very probably more capable than anybody you will be paying to work on this. (One of my standard lines..)
>
--
Robin Hood
Jackson, MS
2003 Buick Lesabre
1968 Pontiac Catalina
1978 GMC Royale motorhome
1977 GMC Palm Beach motorhome
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187884 is a reply to message #187879] |
Sun, 21 October 2012 16:54 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
|
Senior Member |
|
|
Should one have ignition problem, I found out from a friend that the points
need to be rather clean to work properly.
I was spending lot of my personal time on a unit , when my friend stopped
over and and told me straight out how stupid of a J-p I was by trying to
save a customer cost of points.
I put in a new set and it did the trick.
I think he was correct to call me a stupid J-p.
The Onan has a very weak ignition system, so it demands the best.
On Sun, Oct 21, 2012 at 2:07 PM, Matt Colie <matt7323tze@gmail.com> wrote:
>
>
> Robin Hood wrote on Sun, 21 October 2012 15:48
> > Thanks Jim. I've been messing with this thing for WEEKS now, off and on.
> Jumping 9 and 5 causes a solenoid just upstream of the fuel pump to click,
> and that's it. Pump does nothing.
> >
> > I've tried everything I can think of and read all I could, but it's
> > just beyond me. :(
> > --
> > Robin Hood
>
> Robin,
>
> You are obviously literate and have an IQ well over 80 - Therefore, you
> are very probably more capable than anybody you will be paying to work on
> this. (One of my standard lines..)
>
> Now, you may just have done your diagnosis in the line above.
> The fuel system has three(3) parts.. the fuel pump (big cylindrical thing
> with fittings in sides above and below and electrical connection. The
> solenoid valve is much smaller and typically between the pump and the
> carburetor. It has its fittings in the ends.
>
> The solenoid valve should click once and once only when you put the jumper
> in place.
> The pump will click continuously - if it is working.
> You may not even hear the solenoid. It is not very pronounced. But the
> pump is easy to hear.
>
> If the pump is not cycling, it could easily be the internal contacts.
> They are easy to clean and I am sure someone has written this job up for
> the GMC people somewhere.
>
> If it is cycling, loosen the fitting at the carburetor (real PITA to get
> at) and see if fuel is leaking out with the jumper on.
> - If Not, your problem is in the fuel system nearby.
> - If It is, the problem is now the ignition or the carburetor.
>
> Test the ignition.
> Pull one spark plug cap, put a screw driver into the cap and arrange it so
> it is near metal like 1/8" or so. Put the jumper back on and hit the start
> button.
> Did you see a spark?
> - If not, clean the points and try again.
> - If yes, the problem is in the carburetor.
>
> That may just need cleaning.
>
> Let us know before you spend money.
>
> If given minimum care, these things are anvil reliable and so easy to take
> good care of that it is awesome (in the true sense).
>
> Matt
> --
> Matt & Mary Colie
> '73 Glacier 23 Chaumière (say show-me-air) Just about as stock as you will
> find
> SE Michigan - Twixt A2 and Detroit
> _______________________________________________
> 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
|
|
|
|
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187890 is a reply to message #187879] |
Sun, 21 October 2012 17:45 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
|
Senior Member |
|
|
On Oct 21, 2012, at 3:07 PM, Matt Colie wrote:
>
>
> Robin Hood wrote on Sun, 21 October 2012 15:48
>> Thanks Jim. I've been messing with this thing for WEEKS now, off and on. Jumping 9 and 5 causes a solenoid just upstream of the fuel pump to click, and that's it. Pump does nothing.
>>
>> I've tried everything I can think of and read all I could, but it's
>> just beyond me. :(
>> --
>> Robin Hood
>
> Robin,
>
> You are obviously literate and have an IQ well over 80 - Therefore, you are very probably more capable than anybody you will be paying to work on this. (One of my standard lines..)
>
> Now, you may just have done your diagnosis in the line above.
> The fuel system has three(3) parts.. the fuel pump (big cylindrical thing with fittings in sides above and below and electrical connection. The solenoid valve is much smaller and typically between the pump and the carburetor. It has its fittings in the ends.
>
-------------------------------------------------------------------------------------------------------------------------------
NOTE: THE SOLENOID IS TYPICALLY BETWEEN THE FUEL TANK AND THE FUEL PUMP.
-------------------------------------------------------------------------------------------------------------------------------
> The solenoid valve should click once and once only when you put the jumper in place.
> The pump will click continuously - if it is working.
> You may not even hear the solenoid. It is not very pronounced. But the pump is easy to hear.
>
> If the pump is not cycling, it could easily be the internal contacts. They are easy to clean and I am sure someone has written this job up for the GMC people somewhere.
>
> If it is cycling, loosen the fitting at the carburetor (real PITA to get at) and see if fuel is leaking out with the jumper on.
> - If Not, your problem is in the fuel system nearby.
> - If It is, the problem is now the ignition or the carburetor.
>
> Test the ignition.
> Pull one spark plug cap, put a screw driver into the cap and arrange it so it is near metal like 1/8" or so. Put the jumper back on and hit the start button.
> Did you see a spark?
> - If not, clean the points and try again.
> - If yes, the problem is in the carburetor.
>
> That may just need cleaning.
>
> Let us know before you spend money.
>
> If given minimum care, these things are anvil reliable and so easy to take good care of that it is awesome (in the true sense).
>
> Matt
> --
> Matt & Mary Colie
> '73 Glacier 23 Chaumière (say show-me-air) Just about as stock as you will find
> SE Michigan - Twixt A2 and Detroit
> _______________________________________________
> 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
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187902 is a reply to message #187867] |
Sun, 21 October 2012 20:34 |
 |
mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
Karma: 0
|
Senior Member |
|
|
| emerystora wrote on Sun, 21 October 2012 15:45 |
On Oct 21, 2012, at 3:07 PM, Matt Colie wrote: ...
...
> The fuel system has three(3) parts.. the fuel pump (big cylindrical thing with fittings in sides above and below and electrical connection. The solenoid valve is much smaller and typically between the pump and the carburetor. It has its fittings in the ends.
>
-------------------------------------------------------------------------------------------------------------------------------
NOTE: THE SOLENOID IS TYPICALLY BETWEEN THE FUEL TANK AND THE FUEL PUMP.
-------------------------------------------------------------------------------------------------------------------------------
> The solenoid valve should click once and once only when you put the jumper in place.
> The pump will click continuously - if it is working.
> You may not even hear the solenoid. ....
|
I have seen solenoids both before and after the pump. Before seems more common and makes more sense. (To me anyway.) A review of Robin's video shows his solenoid is before the pump. it is not NEEDED so it could just be removed. But it does have a propose... if it works, I would leave it in place.
| Kerry Pinkerton wrote on Sun, 21 October 2012 12:45 |
Buying a new board first would be cheaper than paying for some guy to look at it and tell you that your board is bad. Jim K has them rebuilt for a hundred bucks.
|
If the Onan does not run with pins 5 and 9 jumped, a new board will not help. I'm NOT saying his board is good... just that, if it is bad, it isn't the only problem.
| WD0AFQ wrote on Sun, 21 October 2012 12:58 |
Robin, time to call Jim on his dime. Dont pay anyone before you call him.
|
Agreed.
---
Robin, Lawyer or not, you can figure this out. It isn't rocket surgery.
A gasoline engine need three things to run. Compressed air (with oxygen), Fuel and spark.
1.) As your engine seems to be turning over, we'll AssUMe you have compression. (But could be checked with a compression gauge.) Also, if you are breathing the same air, we'll assume it has enough O2.
2.) You say you do not hear your fuel pump running. It is most likely gummed up inside. It is easy to dissemble and clean... it isn't even that hard to put back together! Basically it is a slug the sides back and forth and a couple of check valves. If needed you can use a gas can and gravity feed the fuel for testing. But work on #3 first...
3.) In an earlier post you say that " Spraying ether into the carb does nothing." That seems to tell me you have no spark. Points are not that hard... just that due to the dual output coil, Onan points need to be in good shape. You can sand/file them clean and reset the gap. You have an advantage over most, it looks like you have the newer style points that the cover comes off the top. (The older "rear side cover" style is very hard to set unless the Onan is removed from the coach.) Just keep in mind, even when good, the spark on a Onan is rather weaker that one would expect.
Hopefully you will not have to spend much to get it to fire and run... but you will most likely want new points/plugs before depending on it. (Plus, most likely, a PerTronix upgrade.)
The best replacement generator WAS the Honda EV6010. But Honda stopped manufacturing them a few years ago. They can be found used... but at prices I'd expect from a new generator. Some have installed Generac Quietpact(?)s in 26 foot coaches with good results.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187904 is a reply to message #187902] |
Sun, 21 October 2012 20:47 |
Robin Hood
Messages: 1078
Registered: April 2011
Karma: 3
|
Senior Member |
|
|
Thanks, Mike.
I just got home. My wife and one of her girlfriends with an SUV helped
me out. We caravaned to Mom's house, put the Onan in the back of the
SUV and my engine hoist into our Honda Fit (where it tore the fabric
on the back of the folded down seats. Most importantly, the Onan now
sits in the middle of my garage floor. I'm buying a sturdy 1000 pound
rated workbench tomorrow. I'll have access to all my assorted tools
and toys, and the project will be right here at home where I can
devote serious attention to it.
Where it was located in Mom's carport was only a little better than
attempting a field repair. Maybe with some climate control,lack of
bugs, and room to work with the right tools close to hand, I can make
some progress.
I sprayed ether into the carb after I took the black hose off that
comes from the air filter, with 9 and 5 jumped. Board may or may not
be bad, but to me, this screams "ELECTRICAL!" problem.
I'll shoot another video once I get set up proper in a day or three. I
have Wednesday off, even, if anybody wants to do a 5 way video skype
call and watch me and give me advice... I think I can set that up, but
I hope it's not actually necessary.
--
Robin Hood
Jackson, MS
2003 Buick Lesabre
1968 Pontiac Catalina
1978 GMC Royale motorhome
1977 GMC Palm Beach motorhome
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187916 is a reply to message #187904] |
Sun, 21 October 2012 22:29 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
Robin,
Your immediate problem is that the Onan electric fuel pump is not pumping.
Disconnect the electrical connection to the pump. Connect the pump directly to a 12 volt source capable of at least 5 or 6 amps. It should start clicking and continue doing so until it builds up pressure. If it does not do this, remove the pump (2 lines and 2 mounting bolts) and work on it stand alone on the work bench. As Ken H. stated, it probably is stuck on the contacts inside of it are not making connection. You can fix it.
On your low voltage when cranking. You stated that you have a 50 amp power supply. I think that the starter draws more that 50 amps exceeding the capacity of your supply so the voltage is dropping when cranking. I would wait to work on this until after you get the electric fuel pump working.
If you want some help on Skype call me. I'm n9cv-11 on skype. My home phone number is listed on the black list.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187936 is a reply to message #187916] |
Mon, 22 October 2012 07:16 |
Robin Hood
Messages: 1078
Registered: April 2011
Karma: 3
|
Senior Member |
|
|
Hmm. I had no idea that my 50A power supply wasn't up to it. Now I'm
worried about my little 12v lawn and garden battery, wonder if IT has
enough oomph.
I want to buy my workbench today after work and put the Onan on it.
I'll give y'all a proper walk-around and demonstrate what it does and
does not do via Youtube.
Then I'll take the pump loose and see what I can do about it, hooking
it up to the battery once it's off the Onan just to see what happens,
and try to take it apart to clean it up, see if I can make it go.
Regardless of what other problems the Onan may or may not have, fuel
delivery is the most basic and most straightforward to look at.
On 10/21/12, Ken Burton <n9cv@comcast.net> wrote:
>
>
> Robin,
>
> Your immediate problem is that the Onan electric fuel pump is not pumping.
>
>
> Disconnect the electrical connection to the pump. Connect the pump directly
> to a 12 volt source capable of at least 5 or 6 amps. It should start
> clicking and continue doing so until it builds up pressure. If it does not
> do this, remove the pump (2 lines and 2 mounting bolts) and work on it stand
> alone on the work bench. As Ken H. stated, it probably is stuck on the
> contacts inside of it are not making connection. You can fix it.
>
> On your low voltage when cranking. You stated that you have a 50 amp power
> supply. I think that the starter draws more that 50 amps exceeding the
> capacity of your supply so the voltage is dropping when cranking. I would
> wait to work on this until after you get the electric fuel pump working.
>
> If you want some help on Skype call me. I'm n9cv-11 on skype. My home
> phone number is listed on the black list.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Robin Hood
Jackson, MS
2003 Buick Lesabre
1968 Pontiac Catalina
1978 GMC Royale motorhome
1977 GMC Palm Beach motorhome
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187947 is a reply to message #187867] |
Mon, 22 October 2012 08:34 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
There really ain't one, although there are severalunits which will work. The current Onan unit is too tall to fit. They were going to rework it to fit a power drawer but I haven't heard they did. It was too rich for my blood anyway.
The little Generacs will fit. KenH fitted a contractor grade of someones, there are many of those which could be fitted. Some folks buy the Hinda, in my estimation a typical Honda - that is reliable but badly overpriced. If I have to change mine, I'll probably do the Ken Thang, I'll have to change the air baffles regardless.
--johnny
'76 23' transmode norris
'76 palm beach
From: Robin Hood <loxley@gmail.com>
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Sent: Sunday, October 21, 2012 3:31 PM
Subject: [GMCnet] I give up. (Onan)
I'm taking this thing to the shop. board shows 5-7 volts across the various
terminals when cranking where there should be 10 or more volts. This is
with my battery charger in full on 50 amp starting mode, with 16 volts at
the battery terminals and at the connections coming into the Onan. Pump
doesn't appear to be doing anything. Spraying ether into the carb does
nothing. There are no visible sparks at the points or plugs. Contact
cleaner did not help. I have RTFMd, WTFVd, and read everything I could
online.
Know when to walk away, know when to run.
This is beyond anything I can do myself. I'm just gonna have to point the
Money Gun at the problem.
Question: what's a brand new commercial off the shelf currently available
replacement for our Onans? I have two coaches and one Onan that may or may
not ever work again, so I gotta get at least one replacement.
--
Robin Hood
Jackson, MS
2003 Buick Lesabre
1968 Pontiac Catalina
1978 GMC Royale motorhome
1977 GMC Palm Beach motorhome
_______________________________________________
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
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187956 is a reply to message #187936] |
Mon, 22 October 2012 09:25 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
|
Senior Member |
|
|
you could always do this to salvage an old onan
http://goo.gl/HnFM0
gene
On Mon, Oct 22, 2012 at 5:16 AM, Robin Hood <loxley@gmail.com> wrote:
> Hmm. I had no idea that my 50A power supply wasn't up to it. Now I'm
> worried about my little 12v lawn and garden battery, wonder if IT has
> enough oomph.
>
> I want to buy my workbench today after work and put the Onan on it.
> I'll give y'all a proper walk-around and demonstrate what it does and
> does not do via Youtube.
>
> Then I'll take the pump loose and see what I can do about it, hooking
> it up to the battery once it's off the Onan just to see what happens,
> and try to take it apart to clean it up, see if I can make it go.
> Regardless of what other problems the Onan may or may not have, fuel
> delivery is the most basic and most straightforward to look at.
>
> On 10/21/12, Ken Burton <n9cv@comcast.net> wrote:
> >
> >
> > Robin,
> >
> > Your immediate problem is that the Onan electric fuel pump is not
> pumping.
> >
> >
> > Disconnect the electrical connection to the pump. Connect the pump
> directly
> > to a 12 volt source capable of at least 5 or 6 amps. It should start
> > clicking and continue doing so until it builds up pressure. If it does
> not
> > do this, remove the pump (2 lines and 2 mounting bolts) and work on it
> stand
> > alone on the work bench. As Ken H. stated, it probably is stuck on the
> > contacts inside of it are not making connection. You can fix it.
> >
> > On your low voltage when cranking. You stated that you have a 50 amp
> power
> > supply. I think that the starter draws more that 50 amps exceeding the
> > capacity of your supply so the voltage is dropping when cranking. I
> would
> > wait to work on this until after you get the electric fuel pump working.
> >
> > If you want some help on Skype call me. I'm n9cv-11 on skype. My home
> > phone number is listed on the black list.
> > --
> > Ken Burton - N9KB
> > 76 Palm Beach
> > Hebron, Indiana
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> >
>
>
> --
> Robin Hood
> Jackson, MS
> 2003 Buick Lesabre
> 1968 Pontiac Catalina
> 1978 GMC Royale motorhome
> 1977 GMC Palm Beach motorhome
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187964 is a reply to message #187916] |
Mon, 22 October 2012 10:22 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
A 50 amp supply won't make it. My little set pins a 60 amp ammeter.
--johnny
76 23' transmode norris
'76 palm beach
From: Ken Burton <n9cv@comcast.net>
To: gmclist@temp.gmcnet.org
Sent: Sunday, October 21, 2012 11:29 PM
Subject: Re: [GMCnet] I give up. (Onan)
Robin,
Your immediate problem is that the Onan electric fuel pump is not pumping.
Disconnect the electrical connection to the pump. Connect the pump directly to a 12 volt source capable of at least 5 or 6 amps. It should start clicking and continue doing so until it builds up pressure. If it does not do this, remove the pump (2 lines and 2 mounting bolts) and work on it stand alone on the work bench. As Ken H. stated, it probably is stuck on the contacts inside of it are not making connection. You can fix it.
On your low voltage when cranking. You stated that you have a 50 amp power supply. I think that the starter draws more that 50 amps exceeding the capacity of your supply so the voltage is dropping when cranking. I would wait to work on this until after you get the electric fuel pump working.
If you want some help on Skype call me. I'm n9cv-11 on skype. My home phone number is listed on the black list.
--
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
_______________________________________________
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
|
|
|
|
| Re: [GMCnet] I give up. (Onan) [message #187966 is a reply to message #187964] |
Mon, 22 October 2012 10:36 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
|
Senior Member |
|
|
What are you trying to run/start with the 50A supply?
I don't believe that there is any way the starter for the
Onan should draw that much current! A motorcycle
battery for a Harley or other large bike should easily
spin the starter for the Onan.
Ken Burton's estimate for current draw for the Onan fuel
pump is likely to be pessimistic!
I think you are making unnecessary work for yourself
until you get the fuel pump straightened out.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ~ TZE166V101966 ~ ~ ~ ~
~ ~ ~ '76 ex-Palm Beach ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
______________
*[ ]~~~[][ ][|\
*--OO--[]---O-*
> Date: Mon, 22 Oct 2012 08:22:34 -0700
> From: jhbridges@ymail.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] I give up. (Onan)
>
> A 50 amp supply won't make it. My little set pins a 60 amp ammeter.
>
> --johnny
> 76 23' transmode norris
> '76 palm beach
>
> From: Ken Burton <n9cv@comcast.net>
> To: gmclist@temp.gmcnet.org
> Sent: Sunday, October 21, 2012 11:29 PM
> Subject: Re: [GMCnet] I give up. (Onan)
>
>
>
> Robin,
>
> Your immediate problem is that the Onan electric fuel pump is not pumping.
>
> Disconnect the electrical connection to the pump. Connect the pump directly to a 12 volt source capable of at least 5 or 6 amps. It should start clicking and continue doing so until it builds up pressure. If it does not do this, remove the pump (2 lines and 2 mounting bolts) and work on it stand alone on the work bench. As Ken H. stated, it probably is stuck on the contacts inside of it are not making connection. You can fix it.
>
> On your low voltage when cranking. You stated that you have a 50 amp power supply. I think that the starter draws more that 50 amps exceeding the capacity of your supply so the voltage is dropping when cranking. I would wait to work on this until after you get the electric fuel pump working.
>
> If you want some help on Skype call me. I'm n9cv-11 on skype. My home phone number is listed on the black list.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
|
|
|
|
Goto Forum:
Current Time: Mon Jun 17 02:11:19 CDT 2024
Total time taken to generate the page: 0.05649 seconds
|
GMCforum
Search
Help
Register
Login
Home
