PN8423 Datasheet, PDF (1/2 Pages) Mallory performance club – MSD Rotor

MSD Rotor, PN 8423
Fits MSD Cap-A-Dapt, PN 8445 and PN 8441
also, MSD Distributors with Cap PN 8408
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will help if there is ever a warranty issue with your product and helps the MSD R&D team create
new products that you ask for! Go to www.msdperformance.com/registration.
Parts Included:
1 – Rotor, PN 8423
2 – 5/8” Phillips Head Screws
2 – 3/4” Phillips Head Screws
2 – Belleville Washers
WARNING:  Disconnect the battery during installation. When disconnecting the battery, always
     remove the negative cable first and install it last.
IMPORTANT: There are two different length screws supplied with this rotor. It is important to determine
which screws are correct for your application due to clearance of the magnetic pickup.
Remove the cap, rotor and the cap spacer and note the rotor screw retainer that is installed on the bottom
of the advance plate (Figure 1). There are two styles used; one is a Screw Retainer, the other is a Retainer
with a Nut. The Retainer accepts the shorter 5/8” screw while the Nut version accepts the ¾” screw.
USE 3/4"
SCREW
ROTOR SCREW
RETAINING NUT
USE 5/8"
SCREW
ROTOR SCREW
RETAINER
Figure 1 Determining Rotor Screw Length.
Note: It is recommended to install the rotor and check the clearance
before reassembling the distributor.
Once the rotor screw length is determined, install the rotor being
sure the round and square aligning pegs are lined up correctly.
Install the Belleville washers with the dome facing up on the screws
and tighten the rotor (Figure 2). Install the cap and plug wires.
Figure 2 Washer Installation.
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