Checking The Lower Unit (For Air Leaks) - Yamaha F40BMHD Service Manual

CHK
LOWER UNIT
ADJ
Filling steps
(1) Place the outboard in an upright posi-
tion.
(2) Insert the gear oil tube into the drain
hole and slowly fill the gear oil until oil
flows out of the check hole and no air
bubbles are visible.
(3) Install the gear oil level check screw and
then quickly install the gear oil drain
screw.
Gear oil level check screw
7 Nm (0.7 m
Gear oil drain screw
7 Nm (0.7 m
CHECKING THE LOWER UNIT (FOR
AIR LEAKS)
Check:
• Lower unit holding pressure
Pressure drops → Check the seals
and components.
Lower unit holding pressure
100 kPa (1.0 kgf/cm
Checking steps
CAUTION:
Do not overpressurize the lower unit.
Excessive pressure may damage the oil
seals.
(1) Remove the gear oil level check screw.
(2) Install the pressure tester into the check
hole.
Pressure tester
YB-03595/90890-06762
(3) Apply the specified pressure.
NOTE:
The lower unit should hold the specified
pressure for 10 seconds.
3-20
E
kgf, 5.1 ft lb)
• •
kgf, 5.1 ft lb)
• •
2
, 14.2 psi)