Yamaha F6A Owner's Manual page 194

5) With the outboard motor in a vertical
position, and using a flexible or pressur-
ized filling device, inject the gear oil into
the oil drain plug hole.
Gear oil grade/capacity:
Refer to "SPECIFICATIONS," page 4-1.
6) When the oil begins to flow out of the oil
level plug hole, insert and tighten the oil
level plug.
7) Insert and tighten the oil drain plug.
4-57
GB