Inspecting And Replacing Anode (External) - Yamaha F4B Owner's Manual

Maintenance
1. Gear oil drain screw
2. Oil level plug
4. Remove the oil level plug and gasket to
allow the oil to drain completely.
NOTICE: Check the used gear oil after
it has been drained. If the gear oil is
milky or contains water or a large
amount of metal particles, the gear
case may be damaged. Have a
Yamaha dealer check and repair the
outboard motor.
TIP:
For disposal of used oil, consult your Yamaha
dealer.
5. Using a flexible or pressurized filling de-
vice, inject the gear oil into the gear oil
drain screw hole.
Recommended gear oil:
Hypoid gear oil SAE#90
Gear oil quantity:
0.100 L (0.106 US qt, 0.088 Imp.qt)
59
2
1
ZMU06779
[ECM00713]
6. Put a new gasket on the oil level plug.
When the oil begins to flow out of the oil
level plug hole, insert and tighten the oil
level plug.
Tightening torque:
9.0 Nm (0.92 kgf-m, 6.6 ft-lb)
7. Put a new gasket on the gear oil drain
screw. Insert and tighten the gear oil
drain screw.
Tightening torque:
9.0 Nm (0.92 kgf-m, 6.6 ft-lb)
EMU39331
Inspecting and replacing anode (ex-
ternal)
Yamaha outboard motors are protected from
corrosion by sacrificial anode. Inspect the ex-
ternal anode periodically. Remove scales
from the surface of the anode. Consult a
Yamaha dealer for replacement of the exter-
nal anode.
ECM00720
NOTICE
Do not paint anodes, as this would render
them ineffective.
ZMU06780