[Farmall] M magneto trouble

[farmallgray at aol.com]

Cap and rotor are "consumable" parts. If you have any doubt about them, just replace them.


Todd Markle 

Spring Mills, Pa.



-----Original Message-----
From: William Ransom <wllmrnsm89 at gmail.com>
To: Farmall/IHC mailing list <farmall at lists.antique-tractor.com>
Sent: Wed, Aug 11, 2010 1:24 pm
Subject: [Farmall] M magneto trouble


When I thought the magneto needed a new coil (as I mentioned in a message I sent 
a while ago), I took the magneto apart. I bought a point file and filed the 
points, and, after that, I got it to spark, so apparently the problem I thought 
was with the coil was actually a problem with the points. When I first put the 
magneto back together and back on the tractor, it seemed to be working properly. 
I removed the #1 spark plug and put it on top of the oil filter. I then turned 
the power-takeoff, using the front section of a PTO shaft from a Fox chopper for 
a hand crank. When I did that, the spark plug sparked every fourth time the 
magneto clicked, as it should. However, I tried the same thing a while later and 
then the spark plug sparked sometimes, but not every time it should. Now, I 
can't get the spark plug to spark at all unless I connect it directly to the 
coil, where the coil wire belongs. Then, it sparks every time the magneto 
clicks. Since the spark plug sparks when connect!
 ed directly to the coil but not when connected to the distributor cap, I think 
the problem must be with the cap or rotor. Do you have any idea what to do about 
this problem?
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