286
GEARCASE
PROPELLER SERVICE
PROPELLER SERVICE
Inspection
Carefully examine p ropeller and o utboard f or the
following:
• Damaged blades and sign s of pro peller cavita-
tion (burned paint, etc.)
• Spun or overheated inner hub
• Worn or twisted spline s an d ina dequate lub ri-
cant
• Damaged or missing converging ring (if applica-
ble)
• Damage to outer hub area
• Worn, missing, or incorrect thrust washer and
spacer
• Correct size and style
• Check for ben t or damaged propeller shaft and
twisted splines.
Refer to Propeller Hardware Installation on
p. 287.
Propeller Selection
Water testing with various propeller designs and
sizes is the best method of propeller selection.
The co rrect propeller, und er no rmal lo ad cond i-
tions, will allow the engine to run near the mid-
point of the RPM oper ating range at full throttle.
Refer to SERVICE SPECIFICATIONS on p. 10.
If the propeller blade s have too
much pitch, th e engine will operate be low i ts
normal range at full throttle. Power will be lost,
and powerhead damage coul d occ ur. If the
propeller blades have too little pitch, the
engine will operate above its normal range and
damage from overspeeding could occur.
A WARNING
When servicing the propeller, always shift
the outboard to NEUTRAL, turn the key
switch OFF, and d isconnect the batte ry
positive (+) ca ble so the ou tboard cannot
be started accidentally.
A CAUTION
Selection of the wro ng propell er could
reduce engine service l ife, affect boat pe r-
formance, or cause serious damage to the
powerhead.
008329
30%
40%
50%
60%
70%
80%
90%
100%
2000 3000 4000 5000 6000
Operating Range
Peak HP
H
o
r
s
e
p
o
w
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r
RPM
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