Changing Gear Oil - Yamaha F50 Owner's Manual

shaft.
2. Install the spacer (if equipped), thrust
washer, washer (if equipped), and pro-
peller on the propeller shaft. NOTICE:
Make sure to install the thrust washer
before installing the propeller. Other-
wise, the lower case and propeller
boss could be damaged.
3. Install the spacer (if equipped) and the
washer. Tighten the propeller nut to the
specified torque.
Propeller nut tightening torque:
F50B 35 Nm (3.57 kgf-m, 25.8 ft-lb)
F50HB 35 Nm (3.57 kgf-m, 25.8 ft-lb)
F60B 35 Nm (3.57 kgf-m, 25.8 ft-lb)
F60HB 35 Nm (3.57 kgf-m, 25.8 ft-lb)
F70A 34 Nm (3.47 kgf-m, 25.1 ft-lb)
F70HA 34 Nm (3.47 kgf-m, 25.1 ft-lb)
T50B 35 Nm (3.57 kgf-m, 25.8 ft-lb)
T60B 35 Nm (3.57 kgf-m, 25.8 ft-lb)
4. Align the propeller nut with the propeller
shaft hole. Insert a new cotter pin in the
hole 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 does not align with the
propeller shaft hole after tightening to the
[ECM01881]
[ECM01891]
ZMU02063
specified torque, tighten the nut further to
align it with the hole.
EMU2928B

Changing gear oil

EWM00800
WARNING
Be sure the outboard motor is securely

fastened to the transom or a stable
stand. You could be severely injured if
the outboard motor falls on you.
Never get under the lower unit while it

is tilted, even when the tilt support lever
or knob is locked. Severe injury could
occur if the outboard motor accidental-
ly falls.
1. Tilt the outboard motor so that the gear
oil drain screw is at the lowest point pos-
sible.
2. Place a suitable container under the
gear case.
3. Remove the gear oil drain screw and
gasket. NOTICE: If there is an exces-
sive quantity of metal particles on the
magnetic gear oil drain screw, this
can indicate lower unit problem. Con-
sult your Yamaha dealer.
1. Gear oil drain screw
2. Oil level plug
TIP:
If a magnetic gear oil drain screw is

Maintenance
[ECM01900]
2
1
ZMU03273
91