Changing Gear Oil - Yamaha F250B Owner's Manual

2. Install the thrust washer and propeller on
the propeller shaft. NOTICE: Be sure to
install the thrust washer before install-
ing the propeller, otherwise the lower
case and propeller boss could be
damaged.
[ECM01880]
3. Install the spacer and washer. Tighten
the propeller nut to the specified torque.
Propeller nut tightening torque:
55.0 Nm (5.61 kgf-m, 40.6 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
installed. Otherwise the propeller can
come off during operation.
TIP:
If the propeller nut does not align with the pro-
peller shaft hole after tightening to the speci-
fied torque, tighten the nut further to align it
with the hole.
EMU31913

Changing gear oil

EWM00800
WARNING
Be sure the outboard motor is securely
G
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
G
tilted, even when the tilt support lever or
knob is locked. Severe injury could oc-
cur if the outboard motor accidentally
falls.
1. Tilt the outboard motor so that the gear oil
drain screw is at the lowest point possi-
ble.
2. Place a suitable container under the gear
case.
3. Remove the cooling water inlet covers on
both sides of the gear case. Be careful
not to lose the bolt and nut.
4. Remove the gear oil drain screw and gas-
ket. The screw is magnetic so a small
quantity of metal particles on the end of
[ECM01890]
the screw is normal. Simply remove
them. NOTICE: If there is an excessive
quantity of metal particles on the mag-
netic gear oil drain screw, this can in-
dicate lower unit problem. Consult
your Yamaha dealer.
Maintenance
[ECM01900]
97