INSTALLATION INSTRUCTIONS

7

Figure 11 Wiring with an MSD 7-Series Ignition and Timing Control.

T

A

C

H

C+

C-

IGN

PTS

M+

M-

HEAVY RED

TO GROUND

NOT USED

TIMING

CONTROL

SWITCHED 12 VOLTS

FROM IGNITION KEY

RED

BLACK

NOT

USED

ORANGE

HEAVY BLACK

+

GREEN

VIOLET

+

TO BATTERY

TO BATTERY

Note: MSD 6 and 7 Series Ignitions

share the same color wiring.

REPLACING THE DISTRIBUTOR GEAR

To replace the distributor gear on the MSD Distributors, the following steps must be followed.

1. Remove the original spiral pin with a punch and press the original gear off the shaft. Press the new

gear onto the shaft and line up the holes for the spiral pin.

Note: The holes may not line up.

2. If the holes line up, measure the distance as shown in the diagram. If the measurement is not correct

or the holes do not line up, a new hole must be drilled. If the measurement is within specifications

and the holes line up, install a new spiral pin.

3. To drill a new hole, turn the gear on the shaft so the gear hole is approximately 90° to the original

shaft hole. Carefully position the gear on the shaft to match the specifications given in the drawing.

Note: Before measuring, push the shaft in to remove all of the end play.

4. When the gear is in the correct position, drill a 0.125” hole through the distributor shaft. Install a

new spiral pin and recheck the measurement.

Note: If the measurement is not within specifications after drilling, a slight correction can be made by

machining the upper face of the thrust collar.

Do not remove more than 0.010” or rotor-to-cap

interference may result.

Figure 12 Replacing the Distributor Gear.

THRUST COLLAR

PRESS FIRMLY TO

TAKE OUT ALL END

PLAY BEFORE

MEASURING.

4.005” MAX.

3.996” MIN.