Installing Propeller; Changing Gear Oil - Yamaha F4 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

EMU39322
Spline models
ECM00500
NOTICE
Be sure to use a new cotter pin and bend
the ends over securely. Otherwise the pro-
peller could come off during operation 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: Be
sure to install the thrust washer before
installing the propeller, otherwise the
lower case and propeller boss could
be damaged.
[ECM01880]
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
installed. 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.
EMU39780

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
[ECM01890]
62