Yamaha F50F, Service Manual

Page: 170 / 305

LOWR
Lower unit
6-27
6C13G11
8. Apply a load to the reverse gear by
installing the propeller
8
(without the
washer
9
and
0
), then the spacer
A
as
shown.
NOTE:
Tighten the propeller nut
B
while turning the
drive shaft until the drive shaft can no longer
be turned.
9. Slowly turn the drive shaft clockwise and
counterclockwise and measure the back-
lash when the drive shaft stops in each
direction.
10. Add or remove shim(s) if out of specifica-
tion.
M: Measurement
11. Remove the special service tools, and
then install the water pump assembly.
Reverse gear backlash:
0.89–1.34 mm (0.0350–0.0528 in)
Reverse gear
backlash
Shim thickness
Less than
0.89 mm (0.0350 in)
To be decreased by
(1.12 – M)
×
0.56
More than
1.34 mm (0.0528 in)
To be increased by
(M – 1.12)
×
0.56
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm