Lower Unit; Checking The Gear Oil Level; Changing The Gear Oil - Yamaha F80B Service Manual

Lower unit

Checking the gear oil level

1. Fully tilt the outboard motor down.
2. Remove the check screw 1, and then
check the gear oil level in the lower case.
NOTE:
If the oil is at the correct level, the oil should
overflow out of the check hole when the
check screw is removed.
3. If necessary, add sufficient gear oil of the
recommended type until it overflows out
of the check hole.
Recommended gear oil:
Hypoid gear oil
API: GL-4
SAE: 90
4. Install the check screw, and then tighten
it to the specified torque.
Gear oil check screw:
9 N·m (0.9 kgf·m, 6.6 ft·lb)

Changing the gear oil

1. Tilt the outboard motor up slightly.
2. Place a drain pan under the drain screw
1, remove the drain screw, then the
check screw 2 and let the oil drain com-
pletely.
6D93G11
3
1
S60C3540
Bracket unit / Lower unit
3. Check the oil for metal and discoloration,
and its viscosity. Check the internal parts
of the lower case if necessary.
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