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Mercury MerCruiser MCM 454 Mag MPI User Manual

Mercury MerCruiser MCM 454 Mag MPI
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IGNITION SYSTEM
SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999 Page 4B-7
d. Push end of high tension wire into coil tower. Position boot over coil tower and wipe
off excess insulating compound.
75634
a
b
c
d
a-Wire Supports
b-Distributor Terminal
c-Distributor Coil Wire Terminal
d-Coil Tower
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:
a. Loosen the distributor cap retaining screws.
b. Lift cap away from distributor.
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
cap, near contacts.)
5. If cap is acceptable, clean cap with warm soap and water and dry with compressed air.
Replace if defective.
75629
b
a
c
d
a-Cap Retaining Screws
b-Lift Cap Upward
c-Cap Contacts
d-Center Contact (Inside)
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Mercury MerCruiser MCM 454 Mag MPI Specifications

General IconGeneral
BrandMercury
ModelMerCruiser MCM 454 Mag MPI
CategoryEngine
LanguageEnglish

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