Posted by red.green on February 23, 2013 at 07:28:48 from (76.209.54.137):
In Reply to: John Deere A magneto posted by MikeinInd on February 22, 2013 at 21:29:06:
What you didn’t state in your description was how you hooked up your spark tester. Did you hook it to the existing spark plug wires, if so you just proved one wire not firing as well as the other, replace both. If you used the same test wire to test both, than you have eliminated the wire as a cause. Next clean and check the plug wire holes on the cap, frequently there are dirty.
As John T stated you have to look at the parts relating to only one side firing. Check the armature bushing for excessive wear, as a wobble will create a misfire. Check the rotor for any slop or play on the shaft, lastly I would swap out the condenser, as a weak one sometimes fail on the second spark. I hope this helps.
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