Yamaha F50F Service Manual page 169

Shift rod push arm: 90890-06052
3. Install the special service tools so that it
pushes against the propeller shaft.
NOTE:
Tighten the center bolt while turning the drive
shaft until the drive shaft can no longer be
turned.
Bearing housing puller claw S 1:
90890-06564
Stopper guide plate 2: 90890-06501
Center bolt 3: 90890-06504
4. Install the backlash indicator onto the
drive shaft (18.0 mm [0.71 in] in diame-
ter), then the dial gauge onto the lower
unit.
6C13G11
Shimming (F50, F60) / Backlash (F50, F60)
NOTE:
Install the dial gauge so that the plunger a
contacts the mark b on the backlash indica-
tor.
Backlash indicator 4: 90890-06706
Magnet base plate 5: 90890-07003
Dial gauge set 6: 90890-01252
Magnet base B 7: 90890-06844
5. Slowly turn the drive shaft clockwise and
counterclockwise and measure the back-
lash when the drive shaft stops in each
direction.
Forward gear backlash:
0.35–0.81 mm (0.0138–0.0319 in)
6. Add or remove shim(s) if out of specifica-
tion.
Forward gear
backlash
Less than
0.35 mm (0.0138 in)
More than
0.81 mm (0.0319 in)
M: Measurement
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
7. Remove the special service tools from
the propeller shaft.
Shim thickness
To be decreased by
(0.58 – M) × 0.56
To be increased by
(M – 0.58) × 0.56
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