19
PROPELLER SELECTION
AND INSTALLATION
PROPELLER SELECTION
It is essential to use a propeller on your out-
board motor that is properly matched to your
boat’s operating characteristics. The speed of
the engine when you operate your boat at full
throttle depends on the propeller you use.
Excessive engine speed can seriously damage
the motor, while low engine speed at full throttle
will adversely affect performance. Your operat-
ing load will also affect propeller selection.
Smaller loads generally require larger-pitch pro-
pellers; larger loads generally require smaller-
pitch propellers. Your authorized Suzuki Marine
Dealer will assist you in selecting a suitable pro-
peller for your boat.
You can determine if your propeller is appropri-
ate for use with your boat by using a tachome-
ter to measure engine speed when operating
your boat at full throttle, under minimum load
conditions. If you are using an appropriate pro-
peller, the engine speed will be within the fol-
lowing range:
If the engine speed is not within this range, con-
sult your authorized Suzuki Marine Dealer to
determine which propeller size is best for you.
NOTICE
Installing a propeller with either too much or
too little pitch will cause incorrect maximum
engine speed, which may result in severe
damage to the motor.
Ask your authorized Suzuki marine dealer to
assist you in selecting a suitable propeller for
your boat.
Full throttle
operating
range
DF9.9B
4700 – 5700
r/min. (min
–1
)
DF15A
5000 – 6000
r/min. (min
–1
)
DF20A
5300 – 6300
r/min. (min
–1
)
PROPELLER INSTALLATION
To install a propeller on your outboard motor,
use the following procedure:
1. Coat the propeller shaft splines 1 liberally
with Suzuki water resistant grease to help
prevent corrosion.
2. Place the stopper 2 on the shaft.
3. Align the propeller 3 with the propeller shaft
splines and slide the propeller onto the shaft.
4. Place the washer 4 on the shaft.
5. Install the propeller nut 5 and tighten it with
a torque wrench to 16 – 20 N·m (1.6 – 2.0
kg-m/12 – 14 lb-ft).
6. Insert the cotter pin 6 and bend it so that it
can’t come off.
To remove the propeller, reverse the above pro-
cedure.
WARNING
Failure to take proper precautions when
installing or removing the propeller can result
in severe personal injury.
When installing or removing the propeller:
• Always shift into “Neutral” and remove the
emergency stop switch lock plate so that
the motor cannot be started accidentally.
• Wear gloves to protect hands, and “lock”
the propeller by placing a block of wood
between the blades and the anti-cavitation
plate.
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