Yamaha F25 [252/444] Shimming for usa and canada

6-23

LOWR

SHIMMING (FOR USA AND CANADA)

4. Select:

● Forward gear shim(s)

Remove or add shim(s).

Calculated numeral

Shim size to

use

More than

or less

than

1.00 1.10 1.0

1.10 1.20 1.1

1.20 1.30 1.2

1.30 1.40 1.3

1.40 1.50 1.4

Available shim thickness:

1.0, 1.1, 1.2, 1.3, and 1.4 mm

Reverse gear shim

NOTE:

Find the reverse gear shim thickness (T2)

by selecting shims until the specified mea-

surement (M) is obtained with the special

tool.

1. Calculate:

● Specified measurement (M)

NOTE:

● “R” 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 “R”

mark is missing or unreadable, assume an

“R” value of “0”, and check the backlash

when the unit is assembled.

● If the “R” mark is negative (–), then add

the “R” value to the measurement.

Specified measurement (M) =

1.0 mm – R/100 mm