Mercury MerCruiser MCM 454 Mag MPI Service Manual page 543

MULTI-PORT FUEL INJECTION DISASSEMBLY AND REASSEMBLY
5. Disconnect the wiring harness from the intake air temperature sensor (IAT).
6. Remove the plenum from the manifold.
IMPORTANT: Place a clean shop towel over the openings to prevent foreign materials
from entering the engine.
CLEANING AND INSPECTION
1. Clean plenum in solvent and dry with compressed air.
2. Inspect mating surfaces for damage that could affect gasket sealing.
3. Inspect plenum for cracks in casting.
Index
Page 5C-42
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a - Intake Air Temperature (IAT) Sensor
b - Breather Hose
a - Plenum
b - Intake Manifold
c - Screws
a
a
b
SERVICE MANUAL NUMBER 23
b
75658
c
75615
90-861326--1 MARCH 1999