Yamaha 40D, Owner'S Manual

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Maintenance
50
the lower case and propeller boss
could be damaged.
●
Be sure to use a new cotter pin and
bend the ends over securely. Otherwise
the propeller could come off during op-
eration and be lost.
1. Apply Yamaha marine grease or a cor-
rosion resistant grease to the propeller
shaft.
2. Install the spacer(if equipped), thrust
washer, and propeller on the propeller
shaft.
3. Install the spacer (if equipped) and the
washer. Tighten the propeller nut to the
specified torque.
4. Align the propeller nut with the propeller
shaft hole. Insert a new cotter pin in the
hole and bend the cotter pin ends.
NOTE:
If the propeller nut does not align with the
propeller shaft hole after tightening to the
specified torque, tighten the nut further to
align it with the hole.
EMU29280
Changing gear oil
WARNING
EWM00800
●
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.
NOTE:
If the magnetic gear oil drain screw
equipped: remove all metal particles from
the screw before installing it.
4. Remove the oil level plug to allow the oil
to drain completely.
CAUTION:
ECM00710
Inspect the used oil after it has been
drained. If the oil is milky, water is getting
into the gear case which can cause gear
damage. Consult a Yamaha dealer for re-
pair of the lower unit seals.
1. Gear oil drain screw
2. Oil level plug
ZMU03133
2
1