Yamaha F40BWHD - Checking the Lower Unit (for Air Leaks)

CHK
ADJ
3-20
LOWER UNIT
E
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.
CHECKING THE LOWER UNIT (FOR
AIR LEAKS)
Check:
• Lower unit holding pressure
Pressure drops → Check the seals
and components.
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.
(3) Apply the specified pressure.
NOTE:
The lower unit should hold the specified
pressure for 10 seconds.
T
R
.
.
Gear oil level check screw
7 Nm (0.7 m
•
kgf, 5.1 ft
•
lb)
Gear oil drain screw
7 Nm (0.7 m
•
kgf, 5.1 ft
•
lb)
Lower unit holding pressure
100 kPa (1.0 kgf/cm
2
, 14.2 psi)
Pressure tester
YB-03595/90890-06762