Yamaha 55DEHD User Manual

LOWR
6-29
6885J11
Lower unit
3. Calculate the reverse 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.
Example:
If “M2” is 26.60 mm and “R” is (–1), then
T2 = 26.60 mm – 26.00 mm – (–1)/100
= 26.60 – 26.00 + 0.01
= 0.61 mm
4. Select the reverse gear shim(s) (T2) as
follows.
Example:
If “T2” is 0.47 mm, then the reverse gear
shim is 0.48 mm.
If “T2” is 0.41 mm, then the reverse gear
shim is 0.42 mm.
Backlash
Measuring the forward and reverse
gear backlash
1. Remove the water pump assembly and
oil seal housing.
2. Set the gear shift to “N” position.
69D60360
a
69D60035
1
Calculation formula:
Reverse gear shim thickness (T2) =
M2 – 26.00 – R/100
Calculated numeral
Rounded numeral
at 1/100th place
1, 2 2
3, 4, 5 5
6, 7, 8 8
9, 10 10
Available shim thicknesses:
0.10, 0.12, 0.15, 0.18, 0.30, 0.40 and
0.50 mm
Shift rod push arm 1:
90890-06052
6885J11_06 07.10.10 10:59 Page 30

Yamaha 55DEHD Specifications

General

Brand	Yamaha
Model	55DEHD
Category	Outboard Motor
Language	English