Selecting The Propeller Shaft Shim - SELVA MARINE Grey Whale 200 EFI Service Manual

A – 3
b
NOTE:
"R" is the deviation of the lower case dimen-
sion from standard, and "A" is the deviation of
the propeller shaft housing dimension from
standard. The "R" mark a is stamped on the
trim tab mounting surface of the lower case,
and the "A" mark b is stamped on the pro-
peller shaft housing in 0.01 mm units. If the
"R" mark or "A" mark is unreadable, assume
that "R" and "A" are zero and check the back-
lash when the unit is assembled.
Calculation formula:
Reverse gear shim thickness (T2) =
21.00 + R/100 – A/100 – M2
Example:
If "M2" is 19.92 mm, "R" is (–1), and "A" is
(–3), then
T2 = 21.00 + (–1)/100 – (–3)/100 – 19.92 mm
= 21.00 – 0.01 + 0.03 – 19.92 mm
= 1.10 mm
If "M2" is 19.92 mm, "R" is (+3), and "A" is
(–5), then
T2 = 21.00 + (+3)/100 – (–5)/100 – 19.92 mm
= 21.00 + 0.03 + 0.05 – 19.92 mm
= 1.16 mm
6AL3J11
B
S6AL6750
Shimming (regular rotation model)
3. Select the reverse gear shim(s) (T2) as
follows.
Calculated number
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
Example:
If "T2" is 1.10 mm, then the reverse gear
shim is 1.08 mm.
If "T2" is 1.16 mm, then the reverse gear
shim is 1.15 mm.

Selecting the propeller shaft shim

NOTE:
Be sure to make this measurement in met-
rics.
Rounded number
0
2
5
8
6-26
1
2
3
4
5
6
7
8
9