Yamaha F150B, Service Manual

Page: 302 / 458

8-23
LOWR
Lower unit
2. Apply the specified pressure to check
that the pressure is maintained in the
lower unit for at least 10 seconds.
NOTICE: Do not over pressurize the
lower unit, otherwise the oil seals may
be damaged.
3. If the specified pressure cannot be
maintained, check the drive shaft,
propeller shaft and shift rod oil seals for
damage. If necessary, check each shaft
for bends and damage.
Installing the lower unit
• Do not hold the propeller with your
hands when loosening or tightening it.
• Make sure to disconnect the battery
cables from the battery and the clip from
the engine shut-off switch.
• When installing the lower unit with the
power unit installed, make sure to sus-
pend the outboard motor. If the outboard
motor is not suspended it can fall sud-
denly and result in severe injury.
1. Align
a
of the shift rod with the align-
ment mark
b
.
2. Set the gear shift to the N position.
3. Install the dowels
b
into the lower unit
and extension.
4. Install the lower unit and extension to the
upper case, and then tighten the lower
case mounting bolts
c
to the specified
torque.
5. Install the trim tab
d
to its original
position, and then tighten the trim tab bolt
e
to the specified torque.
Holding pressure:
68.6 kPa (0.686 kgf/cm 2 , 9.9 psi)
a
b
R
N
F
a
Shift rod push arm
a
: 90890-06052
Lower case mounting bolt
c
:
47 N·m (4.7 kgf·m, 34.7 ft·lb)
Trim tab bolt
e
:
42 N·m (4.2 kgf·m, 31.0 ft·lb)
d
c
c
c
c
e
c
b
b
b
b