Yamaha 40V - Page 141

6-26
LOWR
E
SHIMMING
3. Select:
● Forward gear shim
Example:
If T1 is “0.45 mm”,
then forward gear shim = 0.42 mm
If T1 is “0.50 mm”,
then forward gear shim = 0.48 mm
Calculated numeral
at 1/100th place
Rounded
numeral
more than or less
0.00 0.02 0.00
0.02 0.05 0.02
0.05 0.08 0.05
0.08 0.10 0.08
Available shim thickness:
0.05, 0.08, 0.12, 0.30 and 0.50 mm
Reverse gear shim
NOTE:
● Find reverse gear shim thickness (T2) by
backlash measurement.
● Measure the backlash with the original
shim(s).
● If the original shim(s) is unavailable, start
with a 0.50 mm shim.
BACKLASH MEASUREMENT
NOTE:
● Do not install the water pump compo-
nents when measuring the backlash.
● Both forward and reverse gear backlashes
should be measured.
● If both the forward and reverse gear back-
lashes are large than specified, the pinion
may be too high.
● If both forward and reverse gear back-
lashes are smaller than specified, the pin-
ion may be too low.
● If either of these conditions exists, then
check the pinion shim selection.
Available shim thickness:
0.05, 0.08, 0.12, 0.30 and 0.50 mm