[Farmall] 1951 Cub won't start when very hot

[Mike Sloane]

If it is running very hot, I would check the timing as per the manual. 
You need an old fashioned strobe timing light to do it right (and a 12 
volt battery to power the light). Also check to see if you have a lot of 
grass stuck in the radiator and blow it out from behind.

If you have converted the electrical system from 6 volt to 12 volt, you 
need to make sure that there is a proper ballast resistor in series 
between the ignition switch and the coil. Otherwise the coil will 
overheat and cause the problem you are having.

I am sure others will other suggestions,

Mike

On 8/30/2010 12:44 PM, jimbon88 at aol.com wrote:
>
>
> Hi Folks,
>
> I've been lurking on this list for a while to learn about my Cub but
> have never written in.    Now I have a problem that I can't solve and
> would like to know if anyone has any suggestions.   My Cub starts
> right up when it is cold or hot, but after running it so hard that
> the coolant is boiling in the radiator and it is VERY hot, it won't
> start.   It turns over just fine so I don't think it's the starter.
> I installed a new coil with no change.    Then I thought it was a
> fuel vaporization problem, but I can smell gas at the exhaust pipe
> and choking it makes no difference.  I have a pertronix ignition in
> it now, but it acts the same as when I had the points ignition system
> were in it.    If I let the engine cool down for an hour, it starts
> right up as if nothing was wrong.   Does anyone have any other
> thoughts as to what might be causing this no-start condition?
> Thanks for the help.
>
> Jim Gearhart
>
>
>
>
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