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Mercury MerCruiser MCM 502 Mag MPI User Manual

Mercury MerCruiser MCM 502 Mag MPI
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FUEL DELIVERY SYSTEM FOR ELECTRONIC FUEL INJECTION
SERVICE MANUAL NUMBER 23
90-861326--1 MARCH 1999 Page 5A-13
15. Carefully remove the cool fuel system assembly.
16. Slide fuel injectors from their respective bores of intake manifold until fuel rail and injec-
tors are free. Remove fuel rail and injectors as an assembly.
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
and cooler/pump assembly from the cover base.
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
assembly).
5. Remove the two screws retaining the fuel pressure regulator to the fuel cooler. Remove
the regulator.
6. Remove and retain the seawater drain plug and seal from the cooler.
Reassembly
1. Install the small filter (conical side DOWN) in the orifice of the new fuel cooler where the
fuel pressure regulator mounts.
2. Install the regulator onto the cooler using the two screws with washers. Torque the
screws to 53 lb. in. (5.8 N·m).
3. Connect the fuel line to the regulator. Tighten it securely.
75708
a
b
c
d
e
a
a-Filter
b-Fuel Cooler Orifice
c-Pressure Regulator
d-Screw and Washer
e-Fuel Line
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Mercury MerCruiser MCM 502 Mag MPI Specifications

General IconGeneral
BrandMercury
ModelMerCruiser MCM 502 Mag MPI
CategoryEngine
LanguageEnglish

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