288
GEARCASE
GEARCASE LEAK TEST
If cotter pin holes in t he nut (without keeper) and
shaft do not align, tighten further. Do not loosen.
Install keeper (if applicable). Install new cotter pin.
IMPORTANT: After inst allation, make sure out-
board is in NEUTRAL and carefully spin propeller.
Propeller must turn freely and sh ould not spin off
center. If propeller app ears to wobble, check for
possible bent propeller shaft.
GEARCASE LEAK TEST
Drain lubricant before testing.
Use Gearcase Pressure Tester, P/N 507977.
Install lubricant drain/fill p lug and seal, thre ad
pressure test g auge fitting a nd seal in lubricant
level hole.
Pressurize 3 to 6 psi (21 to 42 kPa).
If pressure gauge indicates lea kage, submerge
the gearcase in water to determine source of leak.
If th e gauge does not in dicate le akage, increase
pressure to 16 to 18 psi (110 to 124 kPa). Check
for leaks.
Make necessary repairs and repeat test.
Install Gearca se V acuum T ester, P/N 507982.
Apply 3 to 5 in. of vacuum (76 to 127 mm) Hg.
with pump.
If vacuu m gaug e indicat es le akage, apply oil
around suspect ed seal. If lea k stop s or oil is
drawn in, seal is defective.
Repeat test, g earcase must ho ld minimum o f 15
in. vacuum (381 mm) Hg.
1. Thrust bushing
2. Spacer
3. Propeller nut
4. Keeper
008057
Aluminum or stainless steel
Small diameter hub
Without keeper
120 to 144 in. lbs
Aluminum or stainless steel
Large diameter hub
With keeper
70 to 80 ft. lbs
Aluminum interchangeable hub
Small diameter hub
Without keeper
120 to 144 in. lbs
Aluminum interchangeable hub
Large diameter hub
With keeper
70 to 80 ft. lbs
Stainless steel TBX hub
Large diameter hub
With keeper
70 to 80 ft. lbs
002388
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