Backlash; Measuring The Forward And Reverse Gear Backlash - Yamaha E60HWD Service Manual

Calculation formula:
Reverse gear shim thickness (T2) =
M2 – 28.00 – R/100
Example:
If "M2" is 28.60 mm and "R" is (–1), then
T2 = 28.60 mm – 28.00 mm – (–1)/100
= 28.60 – 28.00 + 0.01
= 0.61 mm
4. Select the reverse gear shim(s) (T2) 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 "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.
2. Set the gear shift to the neutral position
at lower unit using the special service
tool.
Shift rod push arm:
90890-06052
69D5G11
Rounded numeral
2
5
8
10
69D60035
3. Install the special service tools so that it
pushes against the propeller shaft.
NOTE:
Tighten the center bolt while turning the drive
shaft until the drive shaft can no longer be
turned.
Bearing housing puller claw L 1:
90890-06502
Stopper guide plate 2:
90890-06501
Center bolt 3: 90890-06504
4. Install the backlash indicator onto the
drive shaft (20.0 mm [0.78 in] in diame-
ter), then the dial gauge onto the lower
unit.
NOTE:
Install the dial gauge so that the plunger a
contacts the mark b on the backlash indica-
tor.
Backlash indicator 4: 90890-06706
Magnet base plate 5: 90890-07003
Dial gauge set 6: 90890-01252
Magnet base B 7: 90890-06844
Shimming/Backlash
6-28
1
2
3
4
5
6
7
8
9