Poor Boat Performance And/Or Poor Maneuverability-Bow Too Low; Poor Boat Performance And/Or Poor Maneuverability-Bow Too High - Mercury BRAVO Service Manual

SERVICE MANUAL NUMBER 28

Poor Boat Performance And/Or Poor Maneuverability-Bow Too Low

Improper drive unit trim angle.
Boat is bow heavy.
Boat is underpowered.
Permanent hook in boat bottom
(some boats are built with a slight
hook for correct boat performance).
Power hook or weak boat bottom.

Poor Boat Performance And/Or Poor Maneuverability-Bow Too High

Improper drive unit trim angle.
Boat is stern heavy.
Propeller pitch too high.
Permanent rocker in boat bottom
(some boats are built with a slight
rocker for correct boat performance).
Power hook or weak boat bottom.
90-863160 MAY 2000
Cause
Cause
Special Instructions
Properly adjust drive unit trim angle.
Redistribute boat load to stern. If bow
overweight is caused by permanently
installed fuel tank(s), contact the
boat manufacturer.
Check horsepower to weight ratio.
Contact the boat manufacturer.
Check for a hook in the boat bottom
by placing a straight edge, at least 6 ft.
(2m) long, under the bottom edge of
the transom. If a hook is found,
contact the boat manufacturer.
Water test boat. Boat will perform
normally until hook develops at high
speed, then loss of rpm and speed
will occur. Contact boat manufacturer.
Special Instructions
Properly adjust drive unit trim angle.
Redistribute boat load to bow. If stern
overweight is caused by permanently
installed fuel tank(s), contact the
boat manufacturer.
Water test the boat using a lower pitch
propeller.
Check for a rocker in the boat bottom
by placing a straight edge, at least 6 ft.
(2m) long, under bottom edge of the
transom. If a rocker is found, contact
the boat manufacturer.
Water test boat. Boat will perform
normally until hook develops at high
speed, then loss of rpm and speed
will occur. Contact boat manufacturer.
TROUBLESHOOTING
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