Disassembly; Reassembly - Mercury MerCruiser MCM 454 Mag MPI Service Manual

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SERVICE MANUAL NUMBER 23

15. Carefully remove the cool fuel system assembly.

16. Slide fuel injectors from their respective bores of intake manifold until fuel rail and injec-

NOTE: The fuel injectors are to remain fully seated in the fuel rail throughout removal.

Disassembly

NOTE: Retain all fasteners and hardware unless instructed otherwise.

1. Remove the two nuts from the Cool Fuel retaining bracket studs. Lift the retainer bracket

2. Disconnect the fuel lines from the assembly.

3. Disconnect the elbow fitting and fuel pump from the cooler assembly.

4. Remove the elbow fitting from the fuel pump (to allow replacement of O-rings during

5. Remove the two screws retaining the fuel pressure regulator to the fuel cooler. Remove

6. Remove and retain the seawater drain plug and seal from the cooler.

1. Install the small filter (conical side DOWN) in the orifice of the new fuel cooler where the

2. Install the regulator onto the cooler using the two screws with washers. Torque the

3. Connect the fuel line to the regulator. Tighten it securely.

90-861326--1 MARCH 1999

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tors are free. Remove fuel rail and injectors as an assembly.

and cooler/pump assembly from the cover base.

the regulator.

fuel pressure regulator mounts.

screws to 53 lb. in. (5.8 N·m).

Fuel Cooler Orifice

Pressure Regulator

Screw and Washer

FUEL DELIVERY SYSTEM FOR ELECTRONIC FUEL INJECTION

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