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Propeller
NOTICE
• 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.
• Changes to the boat, such as the addition of
bottom paint, additional equipment, etc. will
affect performance.
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.
Propellers have two basic characteristics, diameter
and pitch.
Diameter is that distance measured across the
propeller hub from the outer edge of the 360
is made by the propeller's blade during a single
rotation.
Propeller Assembly
Fig. 2.20.1
14
13
12
11
10
7
8
9
2-20
Section 2 • General Information
o
15
3
4
1
ENGINE SHAFT
5
2
6
FORWARD THRUST WASHER
3
DRIVE SLEEVE
4
INNER HUB
5
BLADE BACK
6
OUTER HUB
7
EXHAUST PASSAGE
8
DIFFUSER RING
Pitch is that distance in inches that a propeller
will travel if rotated one revolution without any
slippage.
Propeller Pitch & Diameter
Fig. 2.20.2
1
PITCH
2
DIAMETER
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
are designed to provide maximum forward thrust,
consequently, the reverse thrust of the propeller will
not be as efficient.
Disconnect power by moving the battery switch
that
to the "OFF" position prior to removing the
propeller.
1
2
R
1
dealer. All propellers
®
DANGER
!
9
PROP NUT
10
LOCK RING
11
DRIVE SLEEVE ADAPTER
12
BLADE TIP
13
LEADING EDGE
14
TRAILING EDGE
15
BLADE FACE
170 Montauk
2
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