Yamaha EK40G Service Manual page 150

LOWR
5. Slowly turn the drive shaft clockwise and
counterclockwise and measure the back-
lash when the drive shaft stops in each
direction.
Forward gear backlash:
0.19– 0.47 mm (0.0075– 0.0185 in)
6. Add or remove shim(s) if out of specifica-
tion.
Forward gear
backlash
Less than
0.19 mm (0.0075 in)
More than
0.47 mm (0.0185 in)
M: Measurement
Available shim thicknesses:
0.05, 0.08, 0.12, 0.30, and
0.50 mm
7. Remove the special service tools from
the propeller shaft.
8. Apply a load to the reverse gear by
installing the propeller 8 (without the
washer 9), then the spacer 0 as shown.
NOTE:
Tighten the propeller nut q while turning the
drive shaft until the drive shaft can no longer
be turned.
6-51
Lower unit
Shim thickness
To be decreased by
(0.33 - M) × 0.53
To be increased by
(M - 0.33) × 0.53
9
q
0
8
6F660560
9. Slowly turn the drive shaft clockwise and
counterclockwise and measure the back-
lash when the drive shaft stops in each
direction.
Reverse gear backlash:
0.76– 1.04 mm
(0.0299– 0.0409 in)
10. Add or remove the shim(s) if out of spec-
ification.
Reverse gear
backlash
Less than
0.76 mm (0.0299 in)
More than
1.04 mm (0.0409 in)
M: Measurement
Available shim thicknesses:
0.05, 0.08, 0.12, 0.30, and
0.50 mm
11. Remove the special service tools, and
then install the water pump assembly.
Shim thickness
To be increased by
(0.9 - M) × 0.53
To be decreased by
(M - 0.9) × 0.53
6H95G11