Mercury MerCruiser MCM 454 Mag MPI User Manual

TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Page 1C-9
90-861326--1 MARCH 1999
Improper Full Throttle Engine RPM
RPM Too High
Cause Special Information
Propeller
Damaged; pitch too low; diameter too
small; propeller hub slipping.
Boat
Water pickup or through hull fittings
mounted too close to propeller
(ventilation); keel located too close to
propeller and/or too deep in the water
(ventilation). Drive installed too high on
transom; wrong gear ratio.
Operation
Unit trimmed out too far
Engine coupler slipping
Unit
trimmed
out
too
far
.
RPM Too Low
Cause Special Information
Propeller Damaged; pitch too great; diameter too
great.
Boat
Dirty or damaged bottom; permanent or
power hook in bottom; false bottom full of
water. Drive installed too low on transom;
wrong gear ratio.
Operation Unit trimmed in too far.
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IndexIndex

Mercury MerCruiser MCM 454 Mag MPI Specifications

General

Brand	Mercury
Model	MerCruiser MCM 454 Mag MPI
Category	Engine
Language	English