GEARCASE
LEAK
TEST
PROCEDURE
LEAK TEST
PROCEDURE
Drain lubricant before testing.
STEP 1
Install lubricant drain/fill plug and seal, thread
pressure test gauge fitting and
seal
in
lubricant
level
fill 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.
STEP 2
Complete successful STEP 1 before proceeding.
Install vacuum test gauge. Apply 3 to 5
in.
of vac-
uum (76 to 127 mm)
Hg.
with pump.
Check for
leakage.
If leakage
occurs, apply oil around suspected
seal. If leak then stops or oil
is
drawn
in,
that seal
is
defective.
Repeat test. Gearcase must
hold minimum of
15
in.
Hg. (kPa).
260
REMOVAL AND
INSTALLATION
Removal
m WARNING
~
During service, the outboard may
drop
unexpectedly. Avoid personal inJury;
always
support
the outboard's
weight
with
a suitable
hoist
or
the
tilt
support
bracket
during
service.
Remove the propeller from the gearcase. Inspect
the condition of the propeller hub.
25/30 MODELS
Remove the trim tab.
ALL
MODELS
Drain the gearcase by first removing the oil level
plug, then the oil fill/drain plug.
1
~--2
TYPICAL
1.
Oil level plug
32396
2. Oil fill/drain plug
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