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Farmall & IHC Tractors Discussion Board

Re: H4 mag


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Posted by El Toro on February 19, 2006 at 04:06:29 from (152.163.100.65):

In Reply to: H4 mag posted by shin on February 18, 2006 at 20:11:45:

Remove the coil wire from cap and hold it within
1/8-1/4 inch (3-6mm) of a good ground on the tractor frame while someone attempts to start the tractor. You may want to use a pair of insulated pliers. Disconnect the kill wire from the mag for now. You should have a nice blue spark. If you have good spark when doing this your plug wires may be the problem. Use only plug wires with copper wire.

If there's no spark remove the coil cover and use a flat blade screwdriver to touch the magnets near the coil. They should pull the screwdriver with some effort. These are what generates spark in a mag when passing past the coil. If the magnets are ok, I think your coil may be weak.
Hal


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