Yamaha F200B Service Manual page 413

Selecting the propeller shaft shim
(T4) (F250G)
1. Install the original propeller shaft shim.
TIP:
• If the original shim is missing, install a new
shim with a thickness of 1.80 mm.
• Do not reuse a shim if deformed or
scratched.
2. Install the propeller shaft assembly and
propeller shaft housing assembly. See
steps 2–4 in "Installing the propeller shaft
housing assembly" (8-35).
3. Set up the special service tools 1 and
2, and then measure the propeller shaft
free play.
Dial gauge set 1: 90890-01252
Magnet base B 2: 90890-06844
Propeller shaft free play:
0.20–0.50 mm (0.0079–0.0197 in)
TIP:
If the free play is within specification, the pro-
peller shaft shim thickness does not need to
be adjusted.
4. Remove the original propeller shaft shim,
and then measure the propeller shaft free
play again without any propeller shaft
shim.
2
1
Shimming (regular rotation model)
5. Select the propeller shaft shim (T4) thick-
ness from the following table according
to the free play measurement.
Free play
measurement
2.16–2.19
2.20–2.29
2.30–2.39
2.40–2.49
2.50–2.59
Available shim thicknesses:
1.80, 1.90, 2.00, 2.10, 2.20 mm
6. Remove the special service tools, and
then install the selected propeller shaft
shim.
Measuring the forward gear backlash
• Spray anti-rust lubricant on the gears and
bearings before installation. Do not apply
gear oil to the parts. Otherwise, correct
measurements cannot be obtained.
• Keep the parts free of foreign material,
such as dirt and lint.
• When measuring the forward gear or
reverse gear backlash, use the original
bearings and shims.
1. Install the original forward gear shims.
TIP:
• If the original shims are missing, install new
shims with a combined thickness of 0.42
mm.
• Do not reuse a shim if deformed or
scratched.
2. Install the taper roller bearing outer race.
See steps 2 and 3 in "Assembling the
lower case" (8-26).
3. Install the forward gear assembly into the
lower case.
(mm)
Shim thickness
1.80
1.90
2.00
2.10
2.20
8-50
8