Forward Gear Shim; Available Shim Thickness - Yamaha F20A Service Manual

LOWR
SHIMMING (FOR USA AND CANADA)
5. Adjust:
Shimming gauge-to-pinion gear
clearance
Remove or add shim(s).

Available shim thickness:

0.7, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, and
1.6 mm

Forward gear shim

NOTE:
Find the forward gear shim thickness (T1)
by selecting shims until the specified mea-
surement (M) is obtained with the special
tool.
1. Calculate:
Forward gear shim thickness (T1)
Forward gear shim thickness (T1) =
1.0 mm + F/100 mm + M
NOTE:
"F" is the deviation of the lower case
dimension from standard. It is stamped
on the anode mounting surface of the
lower case in 0.01 mm units. If the "F"
mark is missing or unreadable, assume an
"F" value of "0", and check the backlash
when the unit is assembled.
If the "F" mark is negative (–), then sub-
tract the "F" value to the measurement.
6-21
E