Distributor Assembly - Mercury MerCruiser MCM 454 Mag MPI Service Manual

IGNITION SYSTEM
REPLACING
IMPORTANT: Use only a distributor cap recommended for Marine application.
1. Install distributor cap by aligning tab in distributor cap with notch on distributor body.
Tighten the retaining screws.
NOTE: Use care when removing spark plug wires and boots from distributor cap. Twist the
boot 1/2 turn before removing. Firmly grasp and pull on the boot to remove wire end.
2. For best results, individually transfer spark plug wires to replacement cap in order of
removal.
NOTE: Refer to "Spark Plug Wires" in this section, if all spark plug wires (high tension leads)
were removed from cap.

Distributor Assembly

Refer to "General Precautions" in the front of this section, BEFORE proceeding.
REMOVAL
1. Disconnect electrical connectors at distributor module.
2. Remove distributor cap and set it aside.
3. Scribe a line on distributor housing marking position of rotor. Also, mark position of
distributor housing on intake manifold.
4. Remove distributor housing hold-down bolt and clamp.
5. Remove distributor and gasket from intake manifold.
IMPORTANT: DO NOT crank engine over after distributor has been removed.
6. Align rotor with scribe mark on distributor housing. Scribe a line on the gear, in line with
housing to intake manifold scribe mark.
Index
Page 4B-8
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NOTICE
SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999