Propellers - BRP Evinrude E-Tec Series Installation Manual

PREDELIVERY

PROPELLERS

PROPELLERS
Propeller Selection
A
CAUTION
Selection of the wrong propeller could
reduce engine service life, affect boat per-
formance, or cause serious damage to the
powerhead.
Water testin g wit h variou s propeller designs a nd
sizes is the best method of propeller selection.
The correct prop eller, un der n ormal load condi-
tions, will a llow the engine to run nea r the mid-
point of the RPM ope rating range at full throttle.
Refer to SERVICE SPECIFICATIONS in the Ser-
vice Manual for RPM range.
H
100%
o
90%
r
80%
s
70%
e
p
60%
o
50%
w
40%
e
30%
r
2000 3000
RPM
NOTICE
If the propeller blades have too
much pitch, the engine will operate below its
normal range at full throttle. Power will be lost,
and powerhead damage could occur. If the
propeller blades have too little pitch, the
engine will operate above its normal range and
damage from overspeeding could occur.
86
Operating Range
Peak HP
4000 5000 6000
When selecting a propeller, consider the following:
Use a n accurate t achometer to determine t he
•
engine's full-throttle RPM.
The outboard should be trimmed for top speed.
•
Select a prope ller that suits the customer's
•
application and allows the e ngine to run ne ar
the midpoint of the full-throttle operating ran ge
when the boat has a normal load.
Occasionally, one propeller will not cover a wide
•
range of boat applica tions — water skiing to
high speed performance boating. In such cases,
it might be necessary to have a
each situation.
Refer to the Evinrude/Johnson Genuine Parts
•
and A ccessories C atalog for pro peller styles
and sizes.
Right-hand pr opellers are conside red st andard
•
rotation propellers. When propelling a boa t for-
ward, the
(clockwise) direction as viewed from the rear.
Left-hand pro pellers a re co nsidered counter-
•
rotation propellers. When propelling a boa t for-
ward, the propeller rotates in a left-hand (coun-
terclockwise) direction as viewed from the rear.
008329
1. Right-hand rotation (clockwise)
2. Left-hand rotation (counterclockwise)
For dual-outboard installations, always
check to be sure propellers are installed
on the correct engines before aggres-
sively operating the boat.
propeller rot ates in
2
A
WARNING
propeller for
a right-hand
1
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