[AT] Cub problem

[charlie hill]

When Darrell says dirt beware that it could be a very small particle.
You might not even see it when you brush or blow it out.  Could also
be just a small drop of water down in the jet.  I wouldn't rule out trash
blocking the fuel line (probably in the tank) either.  Sometimes a piece of
trash will float in the tank, cover the outlet briefly causing starvation 
and
then float back away when the engine is no longer syphoning fuel.

Charlie

-----Original Message----- 
From: Darrell Ratliff
Sent: Thursday, May 12, 2016 6:03 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Cub problem

Greg – it sounds like dirt in the jet.  Remove the main jet (brass hex on 
side of the body).  Ream out both openings with a soft copper wire and blow 
it out.


From: Greg Hass
Sent: Thursday, May 12, 2016 2:15 PM
To: at at lists.antique-tractor.com
Subject: [AT] Cub problem

Am having trouble with my 1949 Farmall Cub. It sat from fall until about
April when I started it. It started right up and ran fine for a minute
or so then started missing and almost stopped a couple of times, then in
an instant ran fine for a minute or so and did the same thing over again
and again until I shut it off. A few days later I tried it again and the
same thing. I worked the garden and the same. I might make a pass or two
just fine and I will have to stop a minute or so until it runs right and
then go again. I took the drain plug out of the carb and fuel flow seems
ok. Choking it actually makes the problem worse. Also the problem clears
up too fast to be fuel (my idea). A couple of years ago I switched to
battery ignition; I did not put a whole unit on but fastened a coil onto
the mag. It has worked perfect until now. It seems as if the spark
starts following a carbon mark or something and then suddenly starts
following the correct path. I checked the cap and found no moisture
inside. I know the plug wires are old but looked in the dark and could
see no sparks. Most of the problem is knowing if electrical or fuel. I
am guessing electrical because it seems to clear up and start too quick
to be fuel plus if starved for fuel the choke will usually help for a
few seconds. I put points and condenser in when I changed to coil. Any
ideas.
         Greg Hass
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