Leak Test Procedure; Removal And Installation; Removal - Johnson J10RLSRD Service Manual

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