Preparation; Removal - Mercury MerCruiser MCM 454 Mag MPI Service Manual

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SERVICE MANUAL NUMBER 23

Preparation

IMPORTANT: Sterndrive unit must be removed prior to engine removal. Refer to
Bravo Sterndrive Service Manual.

Removal

1. Disconnect battery cables from battery.
2. Remove instrument harness connector plug from engine harness receptacle after
Be careful when working on fuel system. Gasoline is extremely flammable and
highly explosive under certain conditions. Do not smoke or allow spark or open
flame in area. Wipe up any spilled fuel immediately.
3. Using wrench to stabilize brass filter nut at fuel inlet, loosen fuel line fitting, disconnect
4. Disconnect throttle cable from throttle body and retain locknuts and hardware.
5. Disconnect bullet connectors of trim sender wires (coming from transom assembly) from
NOTE: After wires are disconnected be sure to loosen them from clamps or sta-straps
retaining them to engine or hoses.
6. Disconnect MerCathode wires from MerCathode controller if mounted on engine (some
7. Disconnect seawater inlet hose from gimbal housing.
8. Disconnect exhaust elbow hoses (bellows).
9. Remove both shift cables from shift plate. Retain locknuts and hardware.
10. Disconnect any grounding wires and accessories that are connected to engine.
11. Disconnect (and suitably plug) fluid hoses from power steering control valve on transom.
Center lifting eye (located on top of thermostat housing) is used for engine align-
ment only. DO NOT use to lift entire engine.
Engine MUST be lifted with a lifting arm or damage to engine components will occur.
DO NOT allow lifting sling to hook or compress engine components or damage will
occur.
Index
Index
90-861326--1 MARCH 1999
Downloaded from
https://needmanual.com/
loosening clamp.
and suitably plug fuel line to prevent fuel in tank from leaking into bilge.
engine harness.
models).
MCM MODELS - BRAVO AND BLACKHAWK DRIVES
WARNING
CAUTION
CAUTION
Page 2A-3

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