Selecting The Reverse Gear Shims - Yamaha E60HWD Service Manual

LOWR
Calculation formula:
Forward gear shim thickness (T1) =
24.50 + F/100 – M1
Example:
If "M1" is 24.00 mm and "F" is (+5), then
T1 = 24.50 + (+5)/100 – 24.00 mm
= 24.50 + 0.05 – 24.00 mm
= 0.55 mm
3. Select the forward gear shim(s) (T1) as
follows.
Calculated numeral
at 1/100th 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 "T1" is 0.44 mm, then the forward gear
shim is 0.42 mm.
If "T1" is 0.50 mm, then the forward gear
shim is 0.48 mm.

Selecting the reverse gear shims

1. Install the ball bearing onto the propeller
shaft housing.
2. Measure the bearing housing height (M2)
as shown.
T2
NOTE:
When measuring the reverse gear bearing
height, without the O-ring.
6-27
Lower unit
Rounded numeral
0
2
5
8
69D60350
1
NOTE:
9 Select the shim thickness (T2) by using the
specified measurement(s) and the calcula-
tion formula.
9 Measure the bearing housing at three
points to find the height average.
Shimming plate 1: 90890-06701
Digital caliper 2: 90890-06704
3. Calculate the reverse gear shim thick-
ness (T2) as shown in the examples
below.
a
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.
2
M2
6F660520
69D69360
69D5G11