6-28
E
LOWR
SHIMMING
NOTE:
● “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 “–3”, then
T1 = 24.50 + (–3/100) – 23.90 = 0.57
2. Round off the hundredth digit and
select the appropriate shim(s). In the
example above, the calculated number
is 0.57. The following table Instructs
you to round off 7 to 5 at the hundredth
place. Thus, the shim thickness is 0.55
mm.
NOTE:
● Use a minimum number of shims to get
as close to the calculated thickness as
possible.
● Install the shims with the thicker one fac-
ing the propeller.
● Reverse gear shim selection is unneces-
sary.
Calculated numeral
at 1/100th place
Rounded
numeral
1, 2 0
3, 4, 5 2
6, 7, 8 5
9, 10 8
Available shim thickness:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40
and 0.50 mm
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