Yamaha F225A Service Manual page 192

LOWR
É
NOTE:
Tighten the universal puller or center bolt
while turning the drive shaft until the drive
shaft can no longer be turned.
Bearing housing puller claw L 1:
90890-06502
Stopper guide plate 2: 90890-06501
Center bolt 3: 90890-06504
4. Install the backlash indicator onto the
drive shaft (22.4 mm [0.88 in] in diame-
ter), then the dial gauge onto the lower
unit.
5. Set the lower unit upside down.
É
NOTE:
Install the dial gauge so that the plunger a
contacts the mark b on the backlash indica-
tor.
6-31
Lower unit
Backlash indicator 4: 90890-06706
Magnet base plate 5: 90890-07003
Dial gauge set 6: 90890-01252
Magnet base 7: 90890-06705
6. Slowly turn the drive shaft clockwise and
counterclockwise and measure the back-
lash when the drive shaft stops in each
direction.
Forward gear backlash:
0.21–0.44 mm (0.008–0.017 in)
7. Add or remove shim(s) if out of specifica-
tion.
Forward gear
backlash
Less than
0.21 mm (0.008 in)
More than
0.44 mm (0.017 in)
M: Measurement
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
8. Remove the special service tools from
the propeller shaft.
9. Apply a load to the reverse gear by
installing the propeller 8, the spacer 9
(without the washer 0), then the washer
A as shown.
Shim thickness
To be decreased by
(0.33 – M) × 0.71
To be increased by
(M – 0.33) × 0.71
69J3D11