Distributor Cap - Mercury MerCruiser MCM 454 Mag MPI Service Manual

SERVICE MANUAL NUMBER 23
NOTE: Make sure boot does not come off of tower due to hydraulic air pressure inside boot,
caused during installation.

Distributor Cap

CHECKING
1. To remove distributor cap:
2. Check cap contacts for excessive burning or corrosion.
3. Check center contact for deterioration (worn down, burning or corrosion).
4. Visually check cap for cracks or carbon tracks. (Thin, black lines. Generally inside the
5. If cap is acceptable, clean cap with warm soap and water and dry with compressed air.
Index
90-861326--1 MARCH 1999
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d. Push end of high tension wire into coil tower. Position boot over coil tower and wipe
off excess insulating compound.
a
a - Wire Supports
b - Distributor Terminal
c - Distributor Coil Wire Terminal
d - Coil Tower
a. Loosen the distributor cap retaining screws.
b. Lift cap away from distributor.
cap, near contacts.)
Replace if defective.
a - Cap Retaining Screws
b - Lift Cap Upward
c - Cap Contacts
d - Center Contact (Inside)
b
a
IGNITION SYSTEM
c
b
d
c
d
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