Yamaha F225F, Service Manual

Page: 382 / 576

8-3
LOWR
Lower unit
Removing the lower unit
• Make sure to disconnect the battery
cables from the battery, and remove the
clip from the engine shut-off switch.
• When removing the lower unit with the
power unit installed, make sure to sus-
pend the outboard motor. Otherwise, the
outboard motor could fall suddenly and
result in severe injuries.
• When loosening or tightening the pro-
peller nut, do not hold the propeller
using your hands.
1. Drain the gear oil. See steps 1–6 in
“Changing the gear oil” (10-10).
2. Remove the cotter pin.
3. Set the gear shift to the N position.
4. Place a block of wood between the anti-
cavitation plate and the propeller to
prevent the propeller from turning, and
then remove the propeller nut and
propeller.
5. Mark
a
the trim tab
a
and lower case,
and then remove the trim tab
a
.
6. Remove the lower case mounting bolts
b
and
c
, and then remove the lower
unit
d
.
TIP:
When disassembling the lower unit, measure
the backlash before disassembly. See “Mea-
suring the forward gear backlash and reverse
gear backlash before disassembly” (8-39).
Disassembling the propeller
1. Remove the damper
a
.
Checking the propeller
1. Check the propeller blades and splines.
Replace the propeller if cracked, dam-
aged, or worn.
Driver rod L3
b
: 90890-06652
Needle bearing attachment
c
:
90890-06653
a
b
c
c
d
a
a
b
c