Installing Propeller; Changing Gear Oil - Yamaha F4B Owner's Manual

1. Cotter pin
2. Propeller nut
3. Washer
4. Propeller
5. Thrust washer
3. Remove the propeller and thrust washer.
EMU30672

Installing propeller

EMU39323
Spline models
ECM00501
NOTICE
Make sure to use a new cotter pin and
bend the ends over securely. Otherwise,
the propeller could come off during opera-
tion and be lost.
1. Apply Yamaha grease D (corrosion resis-
tant grease) into the propeller shaft.
2. Install the thrust washer and propeller
onto the propeller shaft. NOTICE: Make
sure to install the thrust washer before
installing the propeller. Otherwise, the
lower case and propeller boss could
be damaged.
[ECM01881]
3. Install the washer and tighten the propel-
ler nut until there is no looseness in the
propeller.
4. Align the propeller nut hole with the pro-
peller shaft hole. Insert a new cotter pin in
the holes and bend the cotter pin ends.
NOTICE: Do not reuse the cotter pin.
Otherwise, the propeller can come off
during operation.
TIP:
If the propeller nut hole does not align with the
propeller shaft hole after tightening the pro-
peller nut, tighten the nut further or loosen the
nut to align the holes.
EMU39781

Changing gear oil

EWM02350
WARNING
Be sure the outboard motor is securely
fastened to the transom or a stable stand.
You could be severely injured if the out-
board motor falls on you.
1. Put the outboard motor in an upright po-
sition (not tilted).
2. Place a suitable container under the gear
case.
3. Remove the gear oil drain screw and gas-
ket.
Maintenance
[ECM01891]
58