MSD 7423 Rotor for Pro Cap, fits PN 7455 MAG Installation - Manual

The reason for this modification
is because voltage will travel
to and from the sharpest point
of the rotor tip. By rounding
the leading edge of the Tip,
the voltage will jump from the
sharp point (trailing edge) of
the tip which will be closer to
the spark plug wire terminal
when the timing is retarded.
This will produce proper spark
distribution even when the timing
is retarded (which alters the rotor
phasing).
The Figures show the Rotor Tip
installation.
Pro Cap Rotor Tip
PN 7411
A new, modified Rotor Tip is supplied with the Pro Cap Kit, PN 7455, and the Pro Cap Rotor, PN 7423.
This Rotor Tip must be used when the ignition timing of the Pro Mag is being retarded.
The modified Rotor Tip has a
90° corner on one side and a
rounded edge on the opposite
side. Installation of the Tip
depends on the rotation of the
Pro Mag. The rounded edge
of the rotor must point in the
direction of the mag's rotation
(the rounded edge is always the
leading side). Note that there is
also an arrow designating the
rotation stamped on both sides
of the new Tip.
CCW
ROTATION
CCW
ROTATION
CW
ROTATION
CW
ROTATION
M S D I G N I T I O N • w w w . m s d i g n i t i o n . c o m • ( 9 1 5 ) 8 5 7 - 5 2 0 0 • FA X ( 9 1 5 ) 8 5 7 - 3 3 4 4
© 2007 Autotronic Controls Corporation
FRM28561 Revised 04/07 Printed in U.S.A.