Shimming (Regular Rotation Model); Shimming Workflow - Yamaha F150B Service Manual

LOWR

Shimming (regular rotation model)

Shimming workflow

Remove the water pump
assembly.
Measure the backlash before
disassembly.
Disassemble the lower unit.
Select the pinion shims (T3).
Assemble the lower unit.
Measure the backlash.
Install the water pump
assembly.
TIP:
• Shimming is not required if the backlash is within specification.
• Shimming is required when assembling the original inner parts and a new lower case.
• Shimming is required when replacing the pinion, forward gear, reverse gear, bearings, shaft, and
housing.
8-25
Lower unit
Within
specification?
NO
Within
specification?
YES
YES
Shimming is not required.
Adjust the forward gear shim
NO
thickness (T1) and reverse
gear shim thickness (T2).