Yamaha 40V Service Manual page 142

LOWR
SHIMMING
Forward gear
1. Measure:
Forward gear backlash
Out of specification → Adjust.
Backlash:
0.18 ~ 0.45 mm (0.007 ~ 0.018 in)
Measuring steps:
Set the bearing housing puller for
pushing the propeller shaft.
Bearing housing puller:
YB-6234/90890-06503
Universal puller:
YB-6117
Stopper guide plate:
90890-06501
Center bolt:
90890-06504
Center bolt:
5 Nm (0.5 m • kg, 3.6 ft • lb)
Set the lower unit upside down.
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.
Backlash adjusting plate:
YB-07003
Dial gauge:
YU-03097/90890-01252
Magnet base:
YU-34481/90890-06705
While pulling the drive shaft, slowly
turn the drive shaft clockwise and
counterclockwise; then, measure the
backlash when the drive shaft stops in
each direction.
6-27
E