Yamaha 50G Service Manual page 116

LOWR
SHIM SELECTION
(EXCEPT FOR USA AND CANADA)
90890-06701
90890-06704
NOTE:
Use a minimum number of shims to
obtain the thickness equal or nearly equal
to the calculation.
Install the shims with the thicker one on
the outer side.
Forward gear shim
1. Find forward gear shim thickness (T1)
by selecting shims until the specified
measurement (M) with the special tool
is obtained.
2. Using a digital caliper at the specified
measurement (M) established above,
measure the bearing height.
Shim thickness (T1)=
50 hp:
22.70 mm + F/100 mm – M
60 ~ 90 hp:
24.50 mm + F/100 mm – M
Shimming plate:
90890-06701
Digital caliper:
90890-06704
3. F 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 F
mark is missing or unreadable, assume
an F mark of "0" and check the backlash
when the unit is assembled.
Example:
If M is "23.90 mm" F is "+5", then
T1 = 24.50 + 5/100 – 23.90 = 0.65
Available shim thickness:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40
and 0.50 mm
6-23
E