[Farmall] Never Heard Such a Bang!

[E]

My 400 did a similar thing,the points rub block broke where it was spinning around on its rivet. Barely would run and acted like it had burned a valve,popped through the muffler too,hope this helps. Good luck  Ed Haley 

------Original Message------
From: Alan <rustaholic777 at yahoo.com>
To: "Farmall/IHC mailing list" <farmall at lists.antique-tractor.com>
Date: Thursday, February 28, 2013 4:05:50 AM GMT-0800
Subject: Re: [Farmall] Never Heard Such a Bang!

Hi Ben,
The first thing I would do is change the coil, points and condenser.
A coil going bad can do the weak power issue. Been there / done that.
The big bang sure sounds like an explosion in the manifold.
Bad spark could give you a lot of unburned gas vapor in there. ????
Alan

--- On Wed, 2/27/13, Barney Van De Weert <bbvande at yahoo.com> wrote:


From: Barney Van De Weert <bbvande at yahoo.com>
Subject: Re: [Farmall] Never Heard Such a Bang!
To: "Farmall/IHC mailing list" <farmall at lists.antique-tractor.com>, "ATIS" <at at lists.antique-tractor.com>
Date: Wednesday, February 27, 2013, 10:14 PM


Not being an expert from you are describing- I would suspect points-condenser or coil. Also could be a fuel problem, with the gas out there today My walk behind snowblower started to run fuel right out the carburetor- I had to take it off and blow it out, put it back on and it works fine. Also you be having a problem with the needle valve sticking in the carb.
 
Barney Van De Weert


________________________________
From: Ben Wagner <supera1948 at gmail.com>
To: ATIS <at at lists.antique-tractor.com>; Farmall/IHC mailing list <farmall at lists.antique-tractor.com> 
Sent: Wednesday, February 27, 2013 9:19 PM
Subject: [Farmall] Never Heard Such a Bang!

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

-- 
www.oldpathsequipment.com
Mt. Solon, Virginia
Antique Machinery Repair and Restoration

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