Poor Boat Performance And/Or Poor Maneuverability - Mercury MerCruiser MCM 454 Mag MPI Service Manual

TROUBLESHOOTING

Poor Boat Performance and/or Poor Maneuverability

Index Index
Page 1C-8
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Symptom
Bow too low
Bow too high
Propeller ventilating
SERVICE MANUAL NUMBER 23
Cause
A. Improper drive unit trim angle
B. Improper weight distribution
C. Boat is underpowered
D. Permanent or power hook in boat bot-
tom
E. False bottom full of water
F. Improperly adjusted anode (after
planes)
G. Dirty boat bottom (marine growth)
A. Improper drive unit trim angle
B. Propeller pitch too great
C. Dirty boat bottom (marine growth)
D. Poor running engine
E. Improper weight distribution
F. Rocker in boat bottom
G. False bottom full of water
H. Improperly adjusted anode (after
planes)
A. Drive unit installed too high on transom
B. Dirty or rough boat bottom
C. Damaged propeller; pitch too small;
diameter too small
D. Keel located too close to propeller or
too deep in the water
E. Water pickup or through hull fittings
located too close to propeller
F. Hook in boat bottom
G. Propeller plugged up with weeds
90-861326--1 MARCH 1999