Yamaha 40V Service Manual page 144

LOWR
SHIMMING
Backlash adjusting plate:
YB-07003
Dial gauge:
YU-03097/90890-01252
Magnet base:
YU-34481/90890-06705
While pulling the drive shaft, slowly
turn the drive shaft clockwise and
counterclockwise; then, measure the
backlash when the drive shaft stops at
each direction.
2. Adjust:
Reverse gear shim(s)
NOTE:
Adjust the shim(s) to be added or removed
according to specification.
Reverse gear
backlash
Less than 0.71 mm
More than 0.98
mm
Available shim thickness:
0.05, 0.08, 0.12, 0.30 and 0.50 mm
6-29
E
Shim thickness
To be decreased
by (0.85 – mea-
surement) × 0.56
To be increased by
(measurement –
0.85) × 0.56