Selecting The Propeller Shaft Shims - Yamaha F150A Service Manual

Shimming plate 3: 90890-06701
Digital caliper 4: 90890-06704
3. Calculate the forward gear shim thick-
ness (T2) as shown in the examples
below.
NOTE:
"R" is the deviation of the lower case dimen-
sion from standard. The "R" mark a is
stamped on the trim tab mounting surface of
the lower case in 0.01 mm units. If the "R"
mark is unreadable, assume that "R" is zero
and check the backlash when the unit is
assembled.
Calculation formula:
Forward gear shim thickness (T2) =
M2 – 29.50 – R/100
Example:
If "M2" is 29.84 mm and "R" is (+1), then
T2 = 29.84 – 29.50 – (+1)/100 mm
= 29.84 – 29.50 – 0.01 mm
= 0.33 mm
4. Select the forward gear shim(s) (T2) as
follows.
Calculated numeral
at 1/100 place
1, 2
3, 4, 5
6, 7, 8
9, 10
63P3F11
Rounded numeral
2
5
8
10
Shimming (counter rotation model)
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40, and
0.50 mm
Example:
If "T2" is 0.33 mm, then the forward gear
shim is 0.35 mm.
If "T2" is 0.79 mm, then the forward gear
shim is 0.80 mm.

Selecting the propeller shaft shims

1. Turn the taper roller bearing outer race
1 two or three times to seat the rollers,
and then measure the bearing height
(M6) as shown.
T´4
NOTE:
• Select the shim thickness (T'4) by using the
specified measurement(s) and the calcula-
tion formula.
• Measure the taper roller bearing at three
points to find the height average.
Shimming plate 2: 90890-06701
Digital caliper 3: 90890-06704
1
2
3
4
5
S63P6820
6
7
8
9
6-58