90-830234R3 DECEMBER 1997 IMPORTANT INFORMATION - 1C-5
5. Flo-Torque II Drive Hub Propellers – Install for-
ward thrust hub (a), replaceable drive sleeve (b),
propeller (c), thrust hub (d), propeller nut retainer
(e) and propeller nut (f) onto the shaft.
a
c
b
d
e
f
6. Place a block of wood between gear case and
propeller and torque propeller nut to 55 lb. ft. (75
N·m).
7. Secure propeller nut by bending three of the tabs
into the thrust hub grooves.
Power Trim System
General Information
The power trim system is filled at the manufacturer
and is ready for use.
Trim outboard through entire trim and tilt range sev-
eral times to remove any air from the system.
The trim system is pressurized and is not externally
vented.
Power Trim Operation
With most boats, operating around the middle of the
“trim” range will give satisfactory results. However, to
take full advantage of the trimming capability there
may be times when you choose to trim your outboard
all the way in or out. Along with an improvement in
some performance aspects comes a greater respon-
sibility for the operator, and this is being aware of
some potential control hazards. The most significant
control hazard is a pull or “torque” that can be felt on
the steering wheel or tiller handle. This steering
torque results from the outboard being trimmed so
that the propeller shaft is not parallel to the water sur-
face.
WARNING
Avoid possible serious injury or death. When the
outboard is trimmed in or out beyond a neutral
steering condition, a pull on the steering wheel or
tiller handle in either direction may result. Failure
to keep a continuous firm grip on the steering
wheel or tiller handle when this condition exists
can result in loss of boat control as the outboard
can turn freely. The boat can now “spin out” or go
into a very tight maximum turn which, if unex-
pected, can result in occupants being thrown
within the boat or out of the boat.
Consider the following lists carefully:
TRIMMING IN OR DOWN CAN:
1. Lower the bow.
2. Result in quicker planing off, especially with a
heavy load or a stern heavy boat.
3. Generally improve the ride in choppy water.
4. Increase steering torque or pull to the right (with
the normal right hand rotation propeller).
5. In excess, lower the bow of some boats to a point
where they begin to plow with their bow in the wa-
ter while on plane. This can result in an unex-
pected turn in either direction called “bow steer-
ing” or “over steering” if any turn is attempted or if
a significant wave is encountered.
WARNING
Avoid possible serious injury or death. Adjust
outboard to an intermediate trim position as
soon as boat is on plane to avoid possible ejec-
tion due to boat spin-out. Do not attempt to turn
boat when on plane if outboard is trimmed ex-
tremely in or down and there is a pull on the steer-
ing wheel or tiller handle.
TRIMMING OUT OR UP CAN:
1. Lift the bow higher out of the water.
2. Generally increase top speed.
3. Increase clearance over submerged objects or a
shallow bottom.
4. Increase steering torque or pull to the left at a nor-
mal installation height (with the normal right hand
rotation propeller).
5. In excess, cause boat “porpoising” (bouncing) or
propeller ventilation.
6. Cause engine overheating if any water intake
holes are above the water line.
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