Measuring The Forward Gear Backlash And Reverse Gear Backlash Before Disassembly - Yamaha F225F Service Manual

LOWR
Measuring the forward gear backlash
and reverse gear backlash before
disassembly
1. Remove the water pump assembly,
cover, and outer plate cartridge. See
steps 1–3 in "Removing the water pump
and shift rod" (8-11).
2. Set the gear shift to the N position.
R
N
F
Shift rod socket a: 90890-06679
3. Set up the special service tools b, c,
and d, and then tighten the center bolt
d to the specified torque.
b
Bearing housing puller claw L b:
90890-06502
Stopper guide plate c: 90890-06501
Center bolt d: 90890-06504
Center bolt d (shimming):
20 N·m (2.0 kgf·m, 14.8 ft·lb)
4. Install the special service tool e at the
lowest possible position where the shaft
diameter is 22.4 mm (0.88 in).
5. Set up the special service tools f, g,
and h.
8-39
Lower unit
a
c
b
d
e
g
Backlash indicator e: 90890-06836
Magnet base plate f: 90890-07003
Dial gauge set g: 90890-01252
Magnet base B h: 90890-06844
6. Turn the drive shaft slowly clockwise and
counterclockwise
backlash between where the drive shaft
stops in each direction.
TIP:
• Do not turn the drive shaft using too much
force. Otherwise, the forward gear will turn,
leading to incorrect measurements.
• When turning the drive shaft, hold it using a
little force. A knocking sound may be heard
when the drive shaft is turned, but this is
the sound of the pinion contacting the
reverse gear and does not affect the back-
lash measurement.
7. Turn the drive shaft 180° clockwise and
measure the backlash again.
h
f
and measure the