Yamaha F4B Service Manual

8-3
LOWR
Lower unit
Removing the lower unit (S-transom
model)
• Make sure to 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. If the outboard
motor is not suspended, it can fall sud-
denly and result in severe injuries.
• Do not hold the propeller with your
hands when loosening or tightening the
propeller nut.
1. Drain the gear oil. See steps 1–4 in
“Changing the gear oil” (10-9).
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 keep
the propeller from turning, and then
remove the propeller nut and propeller.
5. Set the gear shift to the R position.
6. Remove the covers a, and then remove
the joints b and c.
7. Remove the lower unit d.
8. Remove the anode e and flushing screw
f.
Removing the lower unit (L-transom
model)
• Make sure to 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. If the outboard
motor is not suspended, it can fall sud-
denly and result in severe injuries.
• Do not hold the propeller with your
hands when loosening or tightening the
propeller nut.
See steps 1–6 in “Removing the lower unit
(S-transom model)” (8-3).
1. Remove the lower unit a and extension
b.
2. Remove the anode c and flushing screw
d.
a
a
c
b
d
e
f

Yamaha F4B Specifications

General

Brand	Yamaha
Model	F4B
Category	Outboard Motor
Language	English