Suzuki DF 25, Service Manual, Page: 26 / 148

PERIODIC MAINTENANCE 2-5
GEAR OIL
1. Place the outboard motor upright on a level surface.
2. Place a container under the lower unit.
3. Remove the gear oil drain plug
1
before the gear oil level
plug
2
and drain the gear oil.
4. Fill with the recommended gear oil through the oil drain hole
until the oil just starts to flow out from the oil level hole.
Gear oil amounts: 60 ml (2.0/2.1 US/Imp. oz)
Recommended oil:
SUZUKI OUTBOARD MOTOR GEAR OIL or SAE #90
HYPOID GEAR OIL
5. Install the oil level plug before removing the oil filler tube
from the drain hole.
6. Install the oil drain plug.

NOTE:
To avoid insufficient injection of the gear oil, check the gear oil
level 10 minutes after doing the procedure in the step 6. If the oil
level is low, slowly inject the gear oil up to the correct level.
Change initially after 20 hours (1 month) and every 100
hours (6 months) thereafter.
Do not re-use the removed gasket. Always use a new
gasket.