Home › Forum › Ask A Member › Grounding Straps on later 18-20-25’s? › Re: Grounding Straps on later 18-20-25’s?
Well, I am asssssuming your are seeing the mag plate ground strap on engines equipped with low tension ignition. It is required on the low tension systems because the external coils/ground are part of the ignition primary circuit, so a good mag plate ground is needed to complete the circuit.
The primary circuit is self contained on the mag plate on universal mag motors, so a great ground isn’t required even though the secondary circuit from the plug wire must return to the mag plate through that bronze bushing. Not the best ground, some guys add ground straps to the universal mag engines as well.
A mag plate ground is not required/needed for CDII systems, except for the UFI systems where the powerpack is under the flywheel.