Fuel Pressure Damper - Mercury MerCruiser MCM 454 Mag MPI Service Manual

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SERVICE MANUAL NUMBER 23

Fuel Pressure Damper

1. Remove flame arrestor, throttle body, plenum and fuel rail as outlined in this section.

2. Remove fuel pressure damper attaching screws and nuts. Remove damper. Ensure that

3. Carefully remove filter from fuel rail using an awl or equivalent tool.

CLEANING AND INSPECTION

1. Inspect fuel pressure damper seating area on fuel rail for pitting, nicks, burrs or irregula-

2. Clean filter of any debris using solvent. Dry using compressed air.

INSTALLATION

1. Install filter into appropriate bore of fuel rail.

2. Install new damper O-rings lubricated with a water/soap solution.

3. Install fuel return passage plug (with o-ring) into end of damper.

4. Carefully slide damper into fuel rail.

5. Apply Loctite 8831 to threads of attaching screws. Install screws and nuts and torque

6. Install fuel rail, plenum, throttle body and flame arrestor as outlined in this section.

7. With engine OFF, cycle ignition switch to ON and wait 2 seconds, and then OFF, four

90-861326--1 MARCH 1999

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Refer to "Precautions" in this section, BEFORE proceeding.

fuel return passage plug is not left in hole.

Fuel Pressure Damper (With Plug)

rities. Use a magnifying glass if necessary. If any of the above is present, replace the

to 88-124 lb-in. (10-14 Nm).

times waiting 10 seconds after each key off to prime the fuel system and check for leaks.

MULTI-PORT FUEL INJECTION DISASSEMBLY AND REASSEMBLY

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