Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 370Get this manual

SHIMMING (FT9.9D)
Reverse gear shim

Find the reverse gear shim thickness (T2) by selecting shims until the specified measurement (Mv2) is obtained with the special tool
1Measure: Measurement (Mv2) Shimming plate: 90890-06701 Digital caliper: 90890-06704

Remove the shim(s) before measuring2Calculate: Reverse gear shim thickness (T2) Reverse gear shim thickness: (T2)81.00Mv2 3Select: Reverse gear shim

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