[AT] [Farmall] Never heard such a bang

[Joe Hazewinkel]

Are you getting good fuel flow?  Only other suggestion might be a stretch, but is it possible that some rust came off inside the manifold that it blocking the airflow?

Enjoy, Joe

Sent from my iPhone just for you

On Mar 1, 2013, at 6:30 PM, Ben Wagner <supera1948 at gmail.com> wrote:

> Here's where we are at now: I dropped my spare H4 (with a new condenser) 
> which throws a nice hot spark on the tractor.  Nothing: I gave up 
> cranking after nearly wearing my arm off!  So I bit the bullet and 
> rebuilt the original magneto: no condenser, new points.  New distributor 
> cap.  The magneto is still throwing a quarter inch spark with no 
> issues.  After reinstalling it, this time I received a bang.
> 
> The timing is perfect: magneto impulse fires #1 terminal on the cap at 
> exactly TDC.
> 
> I took the carburetor apart, again.  Everything is squeaky clean. This 
> is a Zenith 11115B: no main jet adjustment.  The bang proves I am 
> receiving fuel into the engine.
> 
> Valves are still good.  I double checked them all.  No bent pushrods, 
> either.
> 
> So I'm leaning towards spark.  I'm trying to decide what would burn 
> up/break while the tractor is running, which would reduce power, then 
> suddenly not allow it to start at all.  I'm thinking that I should at 
> least get it to run (but maybe not well) even if the coil was bad.  It 
> is throwing a spark all the time while I am cranking the engine.
> 
> Any thoughts?  Thanks for helping solve this problem... I'll be glad to 
> hear this creature run again!
> 
> Ben W.
> 
> www.oldpathsequipment.com
> Mt. Solon, Virginia
> Antique Machinery Repair and Restoration
> 
> On 2/28/2013 3:15 PM, Brian wrote:
>> Sounds like moisture in the distributor cap causing a cylinder to fire at the wrong time.
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