359
Gearcase
Propeller Service
14
Propeller Service
Inspection
Carefully examine propeller and outboard for the
following:
• Damaged blades and signs of propeller cavita-
tion (burned paint, etc.)
• Spun or overheated inner hub
• Worn or twisted splines and inadequate lubri-
cant
• Damage to outer hub area
• Worn, missing, or incorrect thrust washer and
spacer
• Correct size and style
• Check for bent or damaged propeller shaft and
twisted splines.
Refer to Propeller Hardware Installation on p.
360.
Propeller Selection
Water testing with various propeller designs and
sizes is the best method of propeller selection.
The correct propeller, under normal load condi-
tions, will allow the engine to run near the mid-
point of the RPM operating range at full throttle.
Refer to Service Specifications on p. 12.
When selecting a propeller, consider the following:
• Use an accurate tachometer to determine the
engine’s full-throttle RPM.
• The outboard should be trimmed for top speed.
• Select a propeller that suits the customer’s
application and allows the engine to run near
the midpoint of the full-throttle operating range
when the boat has a normal load.
• Occasionally, one propeller will not cover a wide
range of boat applications — water skiing to
high speed performance boating. In such cases,
it might be necessary to have a propeller for
each situation.
• Refer to the Evinrude/Johnson Genuine Parts
and Accessories Catalog for propeller styles
and sizes.
• Right-hand propellers are considered standard
rotation propellers. When propelling a boat for-
ward, the propeller rotates in a right-hand
(clockwise) direction as viewed from the rear.
• Left-hand propellers are considered counter-
rotation propellers. When propelling a boat for-
WARNING
When servicing the propeller, always shift the
outboard to NEUTRAL position, turn the key
switch OFF and remove the key, so the out-
board cannot be started accidentally.
NOTICE
Selection of the wrong propeller could
reduce engine service life, affect boat perfor-
mance, or cause serious damage to the pow-
erhead.
If the propeller blades have too much pitch,
the engine will operate below the recom-
mended full throttle operating range.
If the propeller blades have too little pitch,
the engine will operate above the recom-
mended full throttle operating range.
009316
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