Posted by Picklesmith on May 04, 2014 at 15:36:16 from (72.181.66.217):
I have a 1948 Farmall M with magneto ignition. The tractor has run well for about 2 years. Recently, I have not been able to get the tractor started. I have determined the starting problem to be related to ignition.
By removing a spark plug wire, I can tell that there is no spark being delivered to the spark plugs. Additionally, there is no spark being delivered to the distributor by the secondary lead out from the magneto.
I can time the magneto to #1 cylinder per IH instructions. I have also changed the condenser (and the points), but I still get no spark.
One oddity that I did notice: I can read continuity between the condenser terminal screw and the tractor chassis as though the "kill switch" has the magneto grounded. Removing the wire from the ignition switch to the terminal makes no difference---the magneto still seems to be grounded. Internally, the magneto seems to be in good order with no wires to the condenser touching the case.
Does anyone have suggestions or recommendations? Appreciate your help
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