[AT] timing a cub

[George Willer]

Charlie,

My earlier reply was quoting the IH manual method.  It does result in very
slightly retarded timing for safety reasons (hand cranking).  It's hard to
beat the results of an experienced mechanic timing by ear.  The light is
really a substitute for experience on Cubs.

Last summer before our Cub Tug we tested my special Cub on a dyno hoping to
tune it to the max.  The special carb with adjustable main jet (the IH Cub
carb is non-adjustable) and the timing were both set by ear.  According to
the dyno neither setting could be improved.  It won the first heat.

Larry Dotson was reading the dyno.

Some day we'll discuss the carburetor...

George Willer

> Subject: Re: [AT] timing a cub
> 
> Or you could use my method.  Loosen the distributor and give it a little
> twist and see if the hesitation (flat spot) goes away.
> 
> Charlie
> ----- Original Message -----
> From: "Larry & Barb Dotson" <dotson at loganrec.com>
> To: "Antique tractor email discussion group" <at at lists.antique-
> tractor.com>
> Sent: Thursday, January 31, 2008 8:13 AM
> Subject: Re: [AT] timing a cub
> 
> 
> > Lew,
> > For 16 ddegrees advance, the 2nd timing mark should be approx. 5/8 inch
> > ahead of tdc.
> > You want to be sure the points are set at .020" gap before timing. Also
> > rev
> > engine to 1500 rpm
> > to bring all the advance in when timing with a light.
> >
> > Larry Dotson