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Yamaha F115A Manual De Servicio página 470

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LOWR
BACKLASH (COUNTER ROTATION MODELS)
6970
(3) Install the backlash indicator onto the
drive shaft (on the 22.4 mm (0.88 in)
diameter portion of the drive shaft).
Backlash indicator .................... 5
YB-06265 / 90890-06706
(4) Install the dial gauge onto the lower
unit and have the dial gauge plunger
contact the mark on the backlash indi-
cator.
Magnetic-base attaching
plate ........................................... 6
YB-07003 / 90890-07003
Dial gauge set ........................... 7
YU-03097 / 90890-01252
Magnetic base........................... 8
YU-34481 / 90890-06705
(5) Set the lower unit upside down.
(6) Slowly turn the drive shaft clockwise
and counterclockwise. When the drive
shaft stops in each direction, measure
the backlash.
2. Adjust:
• Forward gear shim
Remove or add shim(s).
Forward gear
backlash
Less than
0.15 mm (0.006 in)
More than
0.30 mm (0.012 in)
M: Measurement
MEASURING THE REVERSE GEAR
BACKLASH
1. Measure:
• Reverse gear backlash
Out of specification → Adjust.
Reverse gear backlash
0.5 - 0.7 mm (0.020 - 0.028 in)
6-85
E
Shim thickness
To be increased by
(0.23 – M) × 0.58
To be decreased by
(M – 0.23) × 0.58
6

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