TROUBLESHOOTING
SERVICE MANUAL NUMBER 28
90-863160 MAY 2000 Page 1C-9
Poor Boat Performance And/Or Poor Maneuverability-Bow Too Low
Cause Special Instructions
Improper drive unit trim angle. Properly adjust drive unit trim angle.
Boat is bow heavy.
Redistribute boat load to stern. If bow
overweight is caused by permanently
installed fuel tank(s), contact the
boat manufacturer.
Boat is underpowered.
Check horsepower to weight ratio.
Contact the boat manufacturer.
Permanent hook in boat bottom
(some boats are built with a slight
hook for correct boat performance).
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.
Power hook or weak boat bottom.
Water test boat. Boat will perform
normally until hook develops at high
speed, then loss of rpm and speed
will occur. Contact boat manufacturer.
Poor Boat Performance And/Or Poor Maneuverability-Bow Too High
Cause Special Instructions
Improper drive unit trim angle. Properly adjust drive unit trim angle.
Boat is stern heavy.
Redistribute boat load to bow. If stern
overweight is caused by permanently
installed fuel tank(s), contact the
boat manufacturer.
Propeller pitch too high.
Water test the boat using a lower pitch
propeller.
Permanent rocker in boat bottom
(some boats are built with a slight
rocker for correct boat performance).
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.
Power hook or weak boat bottom.
Water test boat. Boat will perform
normally until hook develops at high
speed, then loss of rpm and speed
will occur. Contact boat manufacturer.
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