Yamaha SX150C Service Manual page 225

LOWR
6870
BACKLASH (DUAL PROPELLER MODELS)
6865
(3) Install the backlash indicator onto the
drive shaft (on the 22.4 mm (0.88 in)
diameter portion of the drive shaft a).
Backlash indicator .................... 4
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 plate................. 5
YB-07003 / 90890-07003
Dial gauge set ........................... 6
YU-03097 / 90890-01252
Magnetic base........................... 7
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:
• Rear gear backlash
Remove or add shim(s).
Rear gear
backlash
Less than
0.39 mm
(0.015 in)
More than
0.70 mm
(0.027 in)
Available shim thickness
0.10, 0.12, 0.15, 0.18, 0.30, 0.40
and 0.50 mm
M: Measurement
6-80
E
Shim thickness
To be increased by
(0.55 – M) × 0.64
To be decreased by
(M – 0.55) × 0.64