Home › Forum › Ask A Member › 1927 Johnson A-35 Ignition Coil – What to do? › Reply To: 1927 Johnson A-35 Ignition Coil – What to do?

#178262
Tom
Participant

    US Member

    Primary should be around zero. Secondary is about 9000 ohms (9 kohms). Unlike other coils which fire one cylinder only, this one fires two cylinders at the same time. The secondary is not connected to the primary. To test the secondary, you need to measure across the two secondary terminals, NOT from one high tension terminal to ground or primary.

    T