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Mercury MerCruiser MCM 7.4L MPI User Manual

Mercury MerCruiser MCM 7.4L MPI
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MCM MODELS - BRAVO AND BLACKHAWK DRIVES
SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999 Page 2A-3
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
loosening clamp.
WARNING
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
and suitably plug fuel line to prevent fuel in tank from leaking into bilge.
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
engine harness.
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
models).
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.
CAUTION
Center lifting eye (located on top of thermostat housing) is used for engine align-
ment only. DO NOT use to lift entire engine.
CAUTION
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.
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Mercury MerCruiser MCM 7.4L MPI Specifications

General IconGeneral
BrandMercury
ModelMerCruiser MCM 7.4L MPI
CategoryEngine
LanguageEnglish

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