Removing The Water Pump; Measuring The Forward Gear And Reverse Gear Backlash Before Disassembly - Yamaha F50D Servise Manual

Removing the water pump

1. Remove the water pump assembly. See
"Removing the water pump" (8-6).
2. Remove the oil seal housing assembly.
See "Removing the drive shaft and shift
rod assembly" (8-12) step 2.
Measuring the forward gear and
reverse gear backlash before
disassembly
1. Set the gear shift in "N" position.
1
R
N
F
Shift rod push arm 1: 90890-06052
2. Install the special service tool and tem-
porarily tighten the center bolt.
2
3
4
Bearing housing puller claw S 2:
90890-06564
Stopper guide plate 3: 90890-06501
Center bolt 4: 90890-06504
3. Turn the lower unit so that the propeller
shaft is pointing downward.
4. Turn the drive shaft 10 times or more to
seat the taper roller bearing.
5. Tighten the center bolt 4 to the specified
torque while holding the drive shaft not to
turn.
Center bolt 4 (shimming):
5 N·m (0.5 kgf·m, 3.7 ft·lb)
6. Turn the lower unit upright.
7. Install the special service tool 5 onto the
drive shaft at the lowest possible position
where the shaft diameter is 18 mm (0.71
in).
8. Install the special service tool 6 so that
it sits on the step at the position a on the
drive shaft, and then tighten the nuts b
temporarily.
b
Backlash indicator 5: 90890-06706
Handle stopper 6: EU0-23814-30
Shimming (F50D)
4
6
a
5
8-24
0
1
2
3
4
5
6
7
8
9
10
A