Except For Usa And Canada - Yamaha 50G Service Manual

LOWR
SHIM SELECTION

(EXCEPT FOR USA AND CANADA)

90890-06702
90890-06704
EXCEPT FOR USA AND CANADA
Pinion gear shim
1. Find pinion gear shim thickness (T3) by
selecting shims until the specified mea-
surement (M) with the special tool is
obtained.
2. Install the pinion on the drive shaft and
tighten the nut to the specified torque.
Pinion nut:
50 hp:
75 Nm (7.5 m • kg, 54 ft • lb)
60 ~ 90 hp:
95 Nm (9.5 m • kg, 69 ft • lb)
3. Assemble the pinion height gauge with
the drive shaft and bearing as shown in
the illustration. Bolt the bearing hous-
ing to the special tool with at least two
bolts.
Pinion height gauge:
90890-06702
Digital caliper:
90890-06704
4. Using a digital caliper at the specified
measurement (M) established above,
measure the distance between the pin-
ion height gauge and lower surface of
the pinion as shown.
Shim thickness (T3)=
50 hp:
M – 40.2 mm – P/100 mm
60 ~ 90 hp:
M – 31.5 mm – P/100 mm
5. P is the deviation of the lower case
dimension from standard. It is stamped
on the trim tab mounting surface of the
lower case in 0.01 mm units. If the P
mark is missing or unreadable, assume
a P mark of "0" and check the backlash
when the unit is assembled.
Example:
If M is "32.10 mm" P is "+2", then
T3 = 32.10 – 31.5 – 2/100 = 0.58
Available shim thickness:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40
and 0.50 mm
6-22
E