Re: Opposed Twin Magneto Question

[Tom]

The opposed type is similar to the universal mag, but instead of grounding one end of the secondary, it goes to the other spark plug.

In the universal mag, there are three wires: The high tension lead (secondary), the black ground wire, and the green wire to the points. The high tension lead is one side of the secondary winding. The black ground wire is the ground for one side of the primary winding AND the other side of the secondary winding. The green wire is the other side of the primary winding.

So if you research the operation of the universal mag, remember that the primary and secondary windings are both grounded together. In the early Johnson style opposed twin coils, the primary and secondary windings are not connected.

Hope this helps.

T