275
GEARCASE
PROPELLER SERVICE
13
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
• 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 bent or damaged propeller shaft and
twisted splines.
Refer to Propeller Hardware Installation on
p. 61.
GEARCASE LEAK TEST
Drain lubricant before testing.
Install lubricant drain/fill plug and seal, thread
pressure test gauge fitting and seal in lubricant
level hole.
Pressurize 3 to 6 psi (21 to 42 kPa).
If pressure gauge indicates leakage, submerge
the gearcase in water to determine source of leak.
If the gearcase pressure gauge does not indicate
leakage, increase pressure to 16 to 18 psi (110 to
124 kPa). Check for leakage.
Make necessary repairs and repeat test.
Install vacuum test gauge. Apply 3 to 5 in. of vac-
uum (76 to 127 mm) Hg. with pump.
Check for leaks.
If leakage occurs, apply oil around suspected
seal. If leak stops or oil is drawn in, that seal is
defective.
Repeat test, gearcase must hold minimum of 15
in. vacuum (381 mm) Hg.
WARNING
When servicing the propeller, always shift
the outboard to NEUTRAL, turn the key
switch OFF, and disconnect the battery
positive (+) cable so the outboard cannot
be started accidentally.
27022
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