Water Tap Locations For Propshaft Coolers; Water Flow Diagram - Mercury MerCruiser MCM 454 Mag MPI Service Manual

SEAWATER COOLED MODELS

Water Tap Locations For Propshaft Coolers

IMPORTANT: Tapping into the wrong location can cause the engine to vapor lock or
run too cold.
MIE (Inboard) Models Only:
Splice into the port-side exhaust manifold water hose. This provides the temperatures and
pressures required to cool the packing glands without damaging them.
T-Fitting

Water Flow Diagram

MCM / MIE Models With Raw Water Cooling
Index
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SERVICE MANUAL NUMBER 23
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90-861326--1 MARCH 1999
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