Forward Gear; Reverse Gear - Yamaha 40V Service Manual

LOWR
SHIMMING
2. Adjust:
Forward gear shim(s)
NOTE:
Adjust the shim(s) to be added or removed
according to specification.
Forward
gear backlash
Less than 0.18 mm
More than 0.45
mm
Available shim thickness:
0.05, 0.08, 0.12, 0.30 and 0.50 mm

Reverse gear

1. Measure:
Reverse gear backlash
Out of specification → Adjust.
Backlash:
0.71 ~ 0.98 mm (0.028 ~ 0.039 in)
Measuring steps:
Load the reverse gear by installing the
propeller with the front side facing
backward, and tighten the propeller
nut.
Propeller nut:
5 Nm (0.5 m • kg, 3.6 ft • lb)
Attach the backlash indicator on the
drive shaft (18 mm in diameter).
Backlash indicator:
YB-6265/90890-06706
Attach the dial gauge on the gear case,
and make the dial gauge stem contact
the mark on the indicator.
6-28
E
Shim thickness
To be decreased
by (0.31 – mea-
surement) × 0.56
To be increased by
(measurement –
0.31) × 0.56