Selecting The Reverse Gear Shims; Backlash (F50, F60); Measuring The Forward And Reverse Gear Backlash - Yamaha F50F Service Manual

LOWR
2. Calculate the forward gear shim thick-
ness (T1) as shown in the examples
below.
NOTE:
"F" is the deviation of the lower case dimen-
sion from standard. The "F" mark a is
stamped on the trim tab mounting surface of
the lower case in 0.01 mm units. If the "F"
mark is unreadable, assume that "F" is zero
and check the backlash when the unit is
assembled.
Calculation formula:
Forward gear shim thickness (T1) =
26.50 + F/100 – M1
Example:
If "M1" is 26.00 mm and "F" is (–1), then
T1 = 26.50 + (–1)/100 – 26.00 mm
= 26.50 – 0.01 – 26.00 mm
= 0.49 mm
3. Select the forward gear shim(s) (T1) as
follows.
Calculated numeral
at 1/100 place
1, 2
3, 4, 5
6, 7, 8
9, 10
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
6-25
Lower unit
Rounded numeral
0
2
5
8
Example:
If "T1" is 0.49 mm, then the forward gear
shim is 0.48 mm.
If "T1" is 0.58 mm, then the forward gear
shim is 0.55 mm.

Selecting the reverse gear shims

1. Measure the backlash to find the neces-
sary shim thickness (T2). Add or remove
shim(s) if out of specification. For mea-
suring procedure, see "Measuring the
forward and reverse gear backlash."
NOTE:
Measure the backlash with the original
shim(s). If the original shim(s) is unavailable,
start with a 0.50 mm shim.
Available shim thickness:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm

Backlash (F50, F60)

Measuring the forward and reverse
gear backlash
1. Remove the water pump assembly.
2. Set the gear shift to the neutral position
at the lower unit.
6
6C13G11