Reply To: 1954 Johnson CD-10 5.5 HP – Magneto Armature Plate Grunge

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July 18, 2025 at 12:03 pm #298255
Dave Crabtree
Participant

    US Member

    Regarding the reworking of the magneto, I bought new points, condensers, coils, and spark plug wires.  After I got the coils off, I inspected and tested them.  Visual inspection revealed that they had no cracks…they actually looked new.  Both the primary and secondary coils on each coil were electrically tested to be good.  Even though the coils “appear” to be good, should I trust that these 70 year old ignition coils are truly good or will they likely fail once they start being used?  What is your experience?