Boston Whaler 170 Montauk, Owner'S Manual

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2-20 170 Montauk
Section 2 • General Information
R
Propeller
• It is advised that you always carry a spare
propeller, propeller hardware and propeller
wrench on board. Should your propeller
become damaged it can then be easily
replaced.
• Under no circumstance should you use a
propeller which allows the engine to operate
at a higher than recommended RPM.
NOTICE
The engine on your boat has been equipped with
a propeller which our tests have shown to be best
suited for general use under normal conditions and
load. In some situations you may wish to change
the propeller to give your boat slightly different
performance characteristics.
!
DANGER
Disconnect power by moving the battery switch
to the “OFF” position prior to removing the
propeller.
Propellers have two basic characteristics, diameter
and pitch.
Diameter is that distance measured across the
propeller hub from the outer edge of the 360
o
that
is made by the propeller’s blade during a single
rotation.
Propeller Pitch & Diameter
Fig. 2.20.2
PITCH
DIAMETER
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2
1
2
Propeller Assembly
Fig. 2.20.1
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8
ENGINE SHAFT
FORWARD THRUST WASHER
DRIVE SLEEVE
INNER HUB
BLADE BACK
OUTER HUB
EXHAUST PASSAGE
DIFFUSER RING
In general, changing to a lower pitch propeller will
increase acceleration and load pulling capability,
with a slight decrease in top end speed. If you choose
to change propellers, the type should be discussed
with your Boston Whaler
®
dealer. All propellers
are designed to provide maximum forward thrust,
consequently, the reverse thrust of the propeller will
not be as efficient.
Pitch is that distance in inches that a propeller
will travel if rotated one revolution without any
slippage.
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PROP NUT
LOCK RING
DRIVE SLEEVE ADAPTER
BLADE TIP
LEADING EDGE
TRAILING EDGE
BLADE FACE
• Changes to the boat, such as the addition of
bottom paint, additional equipment, etc. will
affect performance.
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