Checking The Lower Unit For Air Leakage - Yamaha F150A Service Manual

4. Align the slot "a" in the impeller "2" with
the Woodruff key "1", and then install the
impeller "2".
2
5. Install the washers "1", wave washer "2",
spacer "3", and collar "4".
TIP:
The spacer "3" and collar "4" should fit
together firmly.
4
3
1
2
1
6. Install a new O-ring "1".
7. Install the water pump housing "1".
Do not turn the drive shaft counterclock-
wise. Otherwise, the water pump impeller
could be damaged.
Drive shaft and lower case (regular rotation model)
a
1
1
8-28
TIP:
While turning the drive shaft clockwise, push
the water pump housing down to install it.
1
Checking the lower unit for air
leakage
1. Remove the check screw "1", and then
install the special service tool "2".
1
Leakage tester "2": 90890-06840
2. Apply the specified pressure. Check that
the pressure is maintained in the lower
unit for 10 seconds or more.
Do not overpressurize the lower unit. Oth-
erwise, the oil seals could be damaged.
Lower unit holding pressure:
69.0 kPa (0.69 kgf/cm
2
2 , 10.0 psi)
0
1
2
3
4
5
6
7
8
9
10
A