6-78
E
LOWR
BACKLASH (DUAL PROPELLER MODELS)
(3) Install the backlash indicator onto the
drive shaft (on the 22.4 mm (0.88 in)
diameter portion of the drive shaft
a
).
(4) Install the dial gauge onto the lower
unit and have the dial gauge plunger
contact the mark on the backlash indi-
cator.
(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.
Backlash indicator ....................
3
YB-06265 / 90890-06706
Magnetic-base plate.................
4
YB-07003 / 90890-07003
Dial gauge set ...........................
5
YU-03097 / 90890-01252
Magnetic base...........................
6
YU-34481 / 90890-06705
6810
2. Adjust:
• Front gear shim
Remove or add shim(s).
M: Measurement
Front gear
backlash
Shim thickness
Less than
0.19 mm
(0.007 in)
To be decreased by
(0.39 – M)
×
0.64
More than
0.59 mm
(0.023 in)
To be increased by
(M – 0.39)
×
0.64
Available shim thickness
0.10, 0.12, 0.15, 0.18, 0.30, 0.40
and 0.50 mm
6835
