Directional References; Engine Rotation - Mercury MerCruiser MCM 454 Mag MPI Service Manual

GENERAL INFORMATION

Directional References

Front of boat is bow; rear is stern. Starboard side is right side; port side is left side. In this
service manual, all directional references are given as they appear when viewing boat from
stern looking toward bow.
FORE or BOW
(FRONT)

Engine Rotation

Engine rotation is determined by observing flywheel rotation from the rear (stern or flywheel
end) of the engine looking forward (toward water pump end). Propeller rotation is not
necessarily the same as engine rotation. When ordering replacement engine, short blocks
or parts for engine, be certain to check engine rotation. Do not rely on propeller rotation in
determining engine rotation.
Standard Left-Hand Rotation
Index Index
Page 1A-4
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STARBOARD
(RIGHT)
PORT
(LEFT)
SERVICE MANUAL NUMBER 23
AFT or STERN
(REAR)
72000
72001
90-861326--1 MARCH 1999