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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 pro-
peller shaft hole after tightening to the speci-
fied torque, tighten the nut further to align it
with the hole.
EMU29281
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 gear oil drain screw.
1. Gear oil drain screw
2. Oil level plug
NOTE:
If the magnetic gear oil drain screw equipped:
remove all metal particles from the screw be-
fore installing it.
4.
Remove the oil level plug to allow the oil
to drain completely.
ECM00710
CAUTION:
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.
NOTE:
For disposal of used oil consult your Yamaha
dealer.
5.
With the outboard motor in a vertical po-
sition, and using a flexible or pressurized
filling device, inject the gear oil into the
gear oil drain screw hole.
Maintenance
2
1
ZMU02064
43
- Quick Links:
- Engine Oil
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Questions and answers
How to start engine for first time
To start a Yamaha 9.9 engine for the first time, follow these steps:
1. Turn the Key to ON – Ensure the key is in the ON position.
2. Check the Oil – Fill the remote oil tank and ensure alarms deactivate.
3. Use the Correct Fuel Mix – For 2-stroke engines, premix fuel and oil as recommended:
- 25:1 mix for the first 10 hours of operation.
- 50:1 mix for oil-injected engines.
4. Prime the Fuel System – Use the primer bulb or electric primer pump before turning the key.
5. Check Safety Features – Ensure the safety tether and kill switch are in the correct position.
6. Ensure Fuel and Spark – Make sure the engine is receiving fuel and has a proper spark.
These steps ensure proper starting and prevent potential issues.
This answer is automatically generated