Home › Forum › Ask A Member › 1940 Johnson HD-15 Magneto testing › Re: 1940 Johnson HD-15 Magneto testing
Something I just thought of.
Using stevens meter you could snake a wire to the primary positive side of coil which is the one you have the red alligator clip to in first pic. Then place flywheel on motor where points have just broke for that cylinder and with stevens on spark check see if you get spark on both cylinders. Then rotate flywheel 180 degrees till points just break and see if you get spark on both plugs. That might also help detect if brushes are working correctly or if the ground brass plate in flywheel is indeed grounded correctly you should only get one spark on one plug wire.
Just thinking what I might try.
Joe
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