Mercury MerCruiser MCM 454 Mag MPI Service Manual page 352

SERVICE MANUAL NUMBER 23
REASSEMBLY
NOTE: When mounting ignition module, thoroughly coat bottom of module with Heat Trans-
fer Compound. Failure to do so could result in damage to the module.
1. Coat bottom of module and module mounting pad (on housing) with Heat Transfer Com-
2. Install ignition module to housing with two screws. Tighten screws securely.
3. Install pickup coil, fitting tab at bottom of coil, into anchor hole of housing.
4. Connect pickup coil electrical connector to module, making sure locking tab is in place.
5. Install shield onto coil.
6. Install retainer (with teeth facing up) using a 5/8 in. (15 mm) socket centered on retainer.
7. Lubricate shaft with grease and install into housing.
8. Install tang washer, washer and drive gear onto shaft.
9. Temporarily install rotor on shaft. Align scribe marks on gear, housing, and rotor.
10. Install roll pin through gear and shaft.
11. Spin shaft to ensure that teeth on shaft assembly do not contact pole piece.
12. Install rotor onto shaft, fitting tab of rotor into slot of shaft.
REPLACEMENT INFORMATION
Replacement distributors are available assembled.
Index
90-861326--1 MARCH 1999
Downloaded from https://needmanual.com/
pound.
Using a small hammer, tap the retainer evenly, down onto the distributor housing upper
bushing. Make sure that both teeth are seated in bushing groove. The retainer should
hold shield, pickup coil and pole piece firmly.
a - Hammer
b - Square Socket, 5/8 in (15 mm)
c - Square Retainer (Teeth Pointing Up)
d - Distributor Housing Upper Bushing (With Groove)
a
b
c
d
IGNITION SYSTEM
72919
Page 4B-11