[AT] Never heard such a bang

[jtchall at nc.rr.com]

Haven't been following things closely but Dave may have hit on the problem. 
If the problem developed suddenly, maybe some gears in the valve train 
decided to go--Only ran into that once and it required all of them to be 
replaced. Has the magneto or distributor gotten loose and rotated? If you 
have a magneto, there is a possibility the phenolic gear inside has broken a 
tooth causing the rotor to be out of time. In the process of working on it 
have you fixed the problem but while checking ignition, crossed the wires?

John Hall


-----Original Message----- 
From: Dave Rotigel
Sent: Monday, March 04, 2013 9:46 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Never heard such a bang

Ben, Are you holding your tongue correctly?
Dave
PS, Is the rotor broken?
PPS, Is the timing correct?

On Mar 4, 2013, at 9:25 PM, Ben Wagner wrote:

> Here's today's update on the Super A: I have ruled out now:
>
> ~Valves. Adjustments are correct, compression is fairly equal (+/- 5)
> across all 4 cyls.
> ~Fuel.  All new fuel in the tractor.  All I get now is a bang a bit 
> sooner!
> ~Spark. Jumping a 1/4 air gap with no problems at the plug.  New spark
> plugs.
> ~Carburetor.  Nothing changed: cleaned and checked for blockage.
> ~Air bath.  Changed oil and checked to verify screen is clean.
>
> I'm not done yet, but I am getting desperate.  All of us easterners will
> be receiving a snowstorm on Wednesday: I need a snowplow tractor!!  I'll
> keep everyone posted.
>
> Ben W.
>
> www.oldpathsequipment.com
> Mt. Solon, Virginia
> Antique Machinery Repair and Restoration
>