Ignition Coil - Mercury MerCruiser MCM 454 Mag MPI Service Manual

IGNITION SYSTEM
INSTALLATION
NOTE: For correct timing of the distributor, install making certain that all components are
aligned as instructed.
1. Align rotor, housing and intake manifold using scribe marks.
2. Slowly lower distributor (with gasket) through intake manifold and into position. If distrib-
utor shaft won't drop into position, back it out and insert a screwdriver into the hole to
turn the oil pump drive shaft. Repeat this adjustment as many times as needed until the
distributor can be firmly seated and all components are in alignment.
3. Install hold-down clamp over distributor and bolt it securely to engine surface. Torque
bolt to 30 lb-ft (40 Nm).
4. Install distributor cap and secure in place with two screws.
5. Connect electrical connectors to module.
IMPORTANT: Before proceeding to the following step, be certain that engine will
obtain an adequate supply of water for cooling. Refer to SECTION 6A, "Seawater
Cooled Models."
6. Start engine and check timing.

Ignition Coil

Refer to "Service Precautions" in "Repair Procedures," BEFORE proceeding.
REMOVAL
1. Disconnect wire harness connectors at coil.
2. Remove high tension coil lead.
3. Remove coil bracket fasteners and remove coil bracket with coil.
Index
Page 4B-12
Downloaded from https://needmanual.com/
a - Wire Harness Connection
b - High Tension Coil Lead Connection
NOTICE
b
a
SERVICE MANUAL NUMBER 23
72921
90-861326--1 MARCH 1999