Mercury MerCruiser MCM 454 Mag MPI Service Manual page 77

MAINTENANCE
MIE (Inboard) Models
Refer to "Cold Weather or Extended Storage," "Precautions," in this section,
1. Ensure that the boat is as level as possible to ensure complete draining of cooling
system.
2. Remove end caps, sealing washers and gaskets from the heat exchanger.
IMPORTANT: Use compressed air to blow any remaining water from the tubes in the
heat exchanger.
NOTE: With the engine level, sufficient draining of manifolds will occur when exhaust
manifold-to-thermostat housing hoses or drain plugs are removed.
3. Remove drain plugs (port and starboard) from bottom of exhaust manifolds.
Index Index
Page 1B-60
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b
a - Heat Exchanger
b - Sealing Washer
c - End Cap
d - Gasket
a - Drain Plug
NOTICE
BEFORE proceeding.
a
c
d
a
SERVICE MANUAL NUMBER 23
71515
74130
90-861326--1 MARCH 1999