[AT] Never Heard Such a Bang!

[Cecil R Bearden]

Sounds like a bad distributor cap or wires or both.  Replace cap rotor 
wires and points then try it again.  It may seem like a lot of parts, 
but you can spend hours trying to diagnose a $15 part.....
Cecil in OKla

On 2/27/2013 10:45 PM, Whittaker Gregory wrote:
> Bad condenser.
>
> On 2/27/2013 9:19 PM, Ben Wagner wrote:
>> Hello,
>>
>> It's been awhile since I've had to ask a question on here. Incidentally,
>> the question is on the tractor I was always bothering everyone about a
>> few years ago, my 1948 Farmall Super A.  Since that restoration, I have
>> completed restoring/rebuilding everything from Gravely walk behinds, to
>> Clinton equipped lawn mowers, to Ford tractors, and now even John Deere
>> two cylinders.
>>
>> All of that to say is even after all of that antique repair work, I am
>> stumped on my Super A once again.  It's a long story: bear with me and
>> maybe I'll give the right information that will help someone diagnose
>> the problem.
>>
>> About a week ago, the Super A had been running for about 20 minutes.  I
>> had it pushing in a John Deere M that I was rebuilding. I stopped to
>> kick the block from under the Deere, while the Super A was running about
>> 3/4 throttle, with a snow blade, so there was load on the Touch
>> Control.  I got back on the A, and gave it a little throttle to push the
>> Deere.  From the three seconds I had gotten off and back on the Farmall,
>> it suddenly had no power.  As in nearly stalling while moving in first
>> gear down a slope.  I cut it off and replaced the D21 plugs with fresh.
>> It ran much better, well enough to push in the Deere (which was quite a
>> load) and even scurry down the road in high gear.  It was still
>> sputtering slightly, but it had power.
>>
>> I pulled the Farmall out a day ago to (once again) move a tractor. It
>> started immediately, I am hand cranking, but it had no power, once
>> again.  It died while I was trying to ease it into an area where I could
>> work on it.   It wouldn't start back up.
>>
>> I tried to start it today, cold, and all I got after four hand cranks
>> (choke at 1/2 like always) was one loud bang in the muffler/manifold.
>> Enough to loosen the muffler from the exhaust pipe!  No backfire, but
>> just one loud bang.  The engine didn't even try to start.
>>
>> I have checked timing.  Everything is in tip top shape.  All the valves
>> are free and adjusted properly.  The carburetor is spotless: good fuel
>> flow, no junk in the lines, clean jets.  It is a Zenith with no high
>> speed adjustments.
>>
>> So the question is, what does the problem seem to be?  I have worked on
>> quite a few engines (but not as many as the folks on this list) but I've
>> never heard such a bang without a hot engine and too much choke!
>>
>> Thanks in advance for your help!
>>
>> Ben Wagner
>>
> _______________________________________________
> AT mailing list
> http://www.antique-tractor.com/mailman/listinfo/at