Gear Oil; Lower Unit Leakage Check - Yamaha F4 Service Manual

INSP
ADJ
LOWER UNIT
1
2
1
4
3
5
6
LOWER UNIT

Gear oil

1. Check:
Gear oil
9
Milky oil ® Replace the oil seal.
Slag oil ® Check the gear, bearing and
dog.
2. Check:
9 Gear oil level
level is low ® Add oil to the proper
level.
3. Replace:
Gear oil
9
Replacement steps:
8 Hold the outboard motor in an up-
right position.
8 Place a container under the drain plug
1.
8 Remove the drain plug, the oil level
plug 2, and then drain the gear oil.
8 Place the outboard in an upright posi-
tion.
8 Add gear oil through the drain hole 3
until it overflows at the oil level
checking hole 4.
Recommended gear oil:
GEAR CASE LUB (USA) or
Hypoid gear oil, SAE #90
Total quantity:
100 cm
(3.38 US oz, 3.52 Imp oz)
8 Install the oil level plug 5 first and
then the drain plug 6.

Lower unit leakage check

1. Check:
9 Pressure
Pressure drops ® Inspect the oil seals
and components.
Checking steps:
8 Connect the leakage tester to the oil
level checking hole.
Leakage tester:
YB-03595/90890-06762
3-10
3
E