Reply To: Mid 70’s OMC. No spark.

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September 8, 2025 at 8:52 pm #299735
jeff-register
Participant

    I haven’t worked on anything that new but I’ll try to suggest a few tests. First do you know how to use a multi meter, for starterd the ohms selection? If so go for the 10k selection or 10,000 ohms. The secondary windings almost always fail first. Check with one  probe on the spark plug wire & the other connected to the mag plate. I’m guessing around 5 to 7 K ohms should be the reading. Others here are very good with your 1970 so I will refer to others. May you post a pic of the magneto please? P.S. Check each coil independantly as they are both their own sysyem electrically.

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

     

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