[AT] IGNITION advice needed

[Ronald Cook]

A friend brought me an A John Deere with carburetor problems.  He wanted 
me to get it running right for him.  The carb was no problem and the 
tractor runs decent until it shuts off unexpectedly.  Sometime in the 
past, someone has converted the WICO mag to operate like a distributor.  
This is a 1948 model, so it is 12-volt.   It is using an external coil 
that is not internally resisted.  Just a hot 12-volt source from a 
switch to the coil.  It gets hot.  Will this set up work alright if I 
put a resistor in the system or get an internally resisted coil?  If it 
were mine, I would put a distributor on it and it would be fine. Or 
overhaul the mag so it would work.

Ron Cook, Salix, IA