Yamaha F115A Service Manual page 474

LOWR
BACKLASH (COUNTER ROTATION MODELS)
6B90
(10) Turn the shift rod into the reverse posi-
tion with the shift rod wrench.
(11) Slowly turn the drive shaft clockwise
and counterclockwise. When the drive
shaft stops in each direction, measure
the backlash.
NOTE:
When measuring the reverse gear backlash,
turn the shift rod wrench towards the
reverse position with force.
2. Adjust:
• Reverse gear shim
Remove or add shim(s).
Reverse gear
backlash
Less than
0.5 mm (0.020 in)
More than
0.7 mm (0.028 in)
M: Measurement
6-87
E
Shim thickness
To be decreased by
(0.6 – M) × 0.58
To be increased by
(M – 0.6) × 0.58