How can I tell what rotation my mag is supposed turn?
Remove the rotor and look at the rotor drive plate. Aim the plate so that it is pointing up and down (12 and 6 o’clock). Now look for the dowel pins in the drive plate that locate the rotor. If the dowel pin on the 12 o’clock portion of the plate is on the right side, it is right hand rotation (clockwise as viewed from the top – Chevy and the like). If the dowel is in the left side, it’s set up for left hand rotation. Don’t loosen the point plate screws thinking you can rotate it enough to compensate and make it work turning the other way. There is not enough adjustment and the points will be totally out of phase with the magnet and windings. The result will be no spark at all. Send it in and have the rotation changed.
