Shimming (Counter Rotation Model); Shimming Workflow - Yamaha F150A Service Manual

Shimming (counter rotation model)

Shimming workflow

1. Remove the water pump
assembly.
2. Measure the backlash before
disassembly.
3. Within specification?
7. Disassemble the lower unit.
8. Select the pinion shims (T3)
and propeller shaft shims (T4).
9. Assemble the lower unit.
10. Measure the backlash.
3. Within specification?
12. Install the water pump
assembly.
1. Remove the water pump assembly.
2. Measure the backlash before disassem-
bly.
3. Within specification?
4. YES
5. Shimming is not required.
6. NO
7. Disassemble the lower unit.
TIP:
• Make sure to drain the gear oil before measuring the backlash.
• If the backlash is within specification, shimming is not required.
• When assembling the original inner parts and a new lower case, shimming is required.
• When replacing the pinion, forward gear, reverse gear, bearings, drive shaft, or propeller shaft
housing, shimming is required.
6. NO
4. YES
Shimming (counter rotation model)
4. YES
5. Shimming is not required.
11. Adjust the forward gear shim
6. NO
thickness (T2) and reverse gear
shim thickness (T1).
8. Select the pinion shims (T3) and propel-
ler shaft shims (T4).
9. Assemble the lower unit.
10. Measure the backlash.
11. Adjust the forward gear shim thickness
(T2) and reverse gear shim thickness
(T1).
12. Install the water pump assembly.
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