Yamaha F100C Service Manual page 177

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:
0.19–0.53 mm (0.007–0.021 in)
7. Add or remove shims if out of specifica-
tion.
Forward gear
backlash
Less than
0.19 mm (0.007 in)
More than
0.53 mm (0.021 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.
60C5D11
Shim thickness
To be decreased by
(0.36 – M) × 0.58
To be increased by
(M – 0.36) × 0.58
Shimming (F100B) / Backlash (F100B)
NOTE:
Tighten the propeller nut B while turning the
drive shaft until the drive shaft can no longer
be turned.
10. Slowly turn the drive shaft clockwise and
counterclockwise,
backlash when the drive shaft stops in
each direction.
Reverse gear backlash:
0.86–1.26 mm (0.034–0.050 in)
11. Add or remove shims if out of specifica-
tion.
Reverse gear
backlash
Less than
0.86 mm (0.034 in)
More than
1.26 mm (0.050 in)
M: Measurement
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
12. Remove the special service tools, and
then install the water pump assembly.
and measure the
Shim thickness
To be increased by
(1.06 – M) × 0.58
To be decreased by
(M – 1.06) × 0.58
6-30
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