Yamaha F40B - Lower Unit Checks

CHK
ADJ
Periodic check and adjustment
3-13 67C3K11
Checking the PTT fluid level
1. Tilt the outboard motor to the fully up
position, and then support it with the tilt
stop lever.
WARNING
After tilting up the outboard motor, be
sure to support it with the tilt stop lever.
Otherwise, the outboard motor could sud-
denly lower if the PTT unit should lose
fluid pressure.
2. Remove the reservoir cap 1, and then
check the fluid level in the reservoir.
NOTE:
If the fluid is at the correct level, a small
amount of fluid should overflow out of the
filler hole when the cap is removed.
3. If necessary, add sufficient fluid of the
recommended type until it overflows out
of the filler hole.
4. Install a new O-ring and the reservoir cap
1, and then tighten the cap to the speci-
fied torque.
Lower unit
Checking the gear oil
1. Tilt the outboard motor to the fully down
position.
2. Remove the gear oil check screw 1, and
then check the gear oil level in the lower
case. Also, check the oil for discoloration
and its viscosity.
NOTE:
• If the oil is at the correct level, a small
amount of oil should overflow out of the
check hole when the gear oil check screw
1 is removed.
• If the oil appears milky or dirty, check for
and repair the cause, and then change the
oil.
3. If necessary, add sufficient gear oil of the
recommended type until it overflows out
of the check hole.
4. Install a new gasket and the gear oil
check screw 1, and then tighten the
screw to the specified torque.
Changing the gear oil
1. Tilt the outboard motor to the fully down
position.
2. Place a drain pan under the gear oil drain
hole, remove the gear oil drain screw 1,
and then the gear oil check screw 2, and
let the oil drain completely.
Recommended PTT fluid:
ATF Dexron II
T
R
.
.
Reservoir cap 1:
7 N·m (0.7 kgf·m, 5.2 ft·lb)
S67C3040
1
Recommended gear oil:
Hypoid gear oil
API: GL-4
SAE: 90
T
R
.
.
Gear oil check screw 1:
9 N·m (0.9 kgf·m, 6.6 ft·lb)
S67C3042
1