Yamaha F150A Service Manual page 344

14. Determine the backlash average, and
then round down the average to 2
decimal places.
Example:
Measurement point "a"
Measurement point "b"
Measurement point "d"
Measurement point "e"
Average
Round-down average
15. Check that the forward gear backlash
average is within specification.
TIP:
Adjust the shim thicknesses if the forward
gear backlash is out of specification.
Forward gear backlash (F150A):
0.15–0.61 mm (0.0059–0.0240 in)
Forward gear backlash (F150B):
0.15–0.68 mm (0.0059–0.0268 in)
16. Remove the special service tools from
the propeller shaft.
17. Apply a load to the reverse gear by
installing the propeller "1", spacer "2"
(without installing the spacer "3"), and
washer "4".
18. Tighten the propeller nut "5" to the
specified torque.
1
A. Except SDS propeller
B. SDS propeller
Propeller nut "5" (shimming):
10 N·m (1.0 kgf·m, 7.4 ft·lb)
(mm)
0.30
0.36
0.34
0.33
0.3325
0.33
A
3
2
4 5
B
3
Shimming (regular rotation model)
19. Repeat steps 12–14 to measure the
reverse gear backlash.
20. Check that the reverse gear backlash
average is within specification.
TIP:
Adjust the shim thicknesses if the reverse
gear backlash is out of specification.
Reverse gear backlash (F150A):
0.33–0.67 mm (0.0130–0.0264 in)
Reverse gear backlash (F150B):
0.33–0.74 mm (0.0130–0.0291 in)
21. Remove the special service tools, and
then install the water pump assembly.
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