[AT] Cub--shouldn't have broken my resolution....(Follow up)

[John Wilkens]

Thanks all for all the good suggestions.  I ran through all of them 
this morning and solved the problem.  Whoever suggested that it might 
have been vandalism or operator error to cause me to find oil in the 
radiator was right.  Only it was gear grease not engine 
oil!  Whew!   I finally figured out why cylinders 1 and 2 were not 
firing.  When I shut off the fuel the engine started to run good for 
a few seconds before it quit.  So I pulled out the main carb jet and 
compared it to a parts carb jet and found that the jet orifice was 
almost three times bigger.  When I put in the jet with the smaller 
orifice it ran just fine.  No idea why cylinders 1 and 2 didn't like 
it while 3 and 4 seemed OK.  Now my only problem is how to get solder 
to stick in a small leak in the top radiator tank after circulating 
that gear grease through it!    Well, life is good 
afterall!    Thanks again for your help fellas.....it all helped!     John



At 07:28 AM 11/13/2006, you wrote:
>John,
>
>A hole in the exhaust side of the manifold is possible, but since the
>tractor runs on two there can't be a hole in the intake side.  It would be
>the same as an intake valve stuck open... not enough vacuum for any cylinder
>to run.
>
>Here's how bad the exhaust side can be and the engine still run:
>
>http://members.toast.net/gwill/album/Tractors/Farmall/Cubs/%2753%5FWV/old_ma
>nifold.jpg
>
>If the intake side of the manifold were obstructed it would have shown up in
>the compression test.  Mud daubers obstructing the exhaust side?  My bet is
>the spark isn't happening at the right time.
>
>We have a good therapy department at the Willer Home for Elderly Cubs.  ;-)
>
>George Willer
>
> > -----Original Message-----
> > From: at-bounces at lists.antique-tractor.com [mailto:at-
> > bounces at lists.antique-tractor.com] On Behalf Of John Wilkens
> > Sent: Monday, November 13, 2006 9:54 AM
> > To: Antique tractor email discussion group
> > Subject: RE: [AT] Cub--shouldn't have broken my resolution....
> >
> > Thanks Dudley, I'll try that today or tomorrow.   John
> >
> >
> >
> > At 12:06 AM 11/13/2006, you wrote:
> > >...    The less troublesome question is why don't cylnders 1 and 2 fire.
> > I
> > >figure there's a mouse nest in the
> > >front part of the manifold or some kind of hole burnt between the intake
> > >tube and exhaust tube.  Ever hear of that happening with a Cub?
> > >Thanks for your moral support!
> > >John,
> > >If the plugs in (and the wires to) cylinders #1 & #2 are good I would be
> > >tempted to remove the plugs and inject the starter fluid directly into
> > the
> > >cylinders.  If they fire momentarily that would go a long way toward
> > >confirming your' thinking about a blockage in the intake manifold.
> > >Dudley
> > >
> > >
> > >
> > >
> > >
> > >
> > >_______________________________________________
> > >AT mailing list
> > >Remembering Our Friend Cecil Monson 11-4-2005
> > >http://www.antique-tractor.com/mailman/listinfo/at
> >
> >
> >                     In the wide-open spaces of NE Oregon
> >
> >
> >
> > _______________________________________________
> > AT mailing list
> > Remembering Our Friend Cecil Monson 11-4-2005
> > http://www.antique-tractor.com/mailman/listinfo/at
>
>_______________________________________________
>AT mailing list
>Remembering Our Friend Cecil Monson 11-4-2005
>http://www.antique-tractor.com/mailman/listinfo/at


                    In the wide-open spaces of NE Oregon