Changing Water Separating Fuel Filter; Mcm (Sterndrive) Models - Mercury MerCruiser MCM 454 Mag MPI Service Manual

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SERVICE MANUAL NUMBER 23

Changing Water Separating Fuel Filter

Be careful when changing water separating fuel filter. Gasoline is extremely

flammable and highly explosive under certain conditions. Be sure ignition key is

OFF. Do not smoke or allow spark or open flame in area when changing fuel filter.

Wipe up any spilled fuel immediately.

Make sure no fuel leaks exist before closing engine hatch.

The electric fuel pump and factory installed water separating fuel filter have been

carefully designed to function properly together. Do not install additional fuel filters

and/or water separating fuel filters between fuel tank and engine.

The installation of additional filters may cause:

1. Unsnap latch and slide top and bottom cover pieces from around the water separating

NOTE: Top and bottom cover pieces are formed with a groove on each side that slides

around the brackets outer edges.

90-861326--1 MARCH 1999

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Fuel Vapor Locking

Difficult Warm-Starting

Piston Detonation Due to Lean Fuel Mixture

Poor Driveability

fuel filter and bracket.

Fuel Filter Cover

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