2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 222Get this manual
Shimming (FSO) (for USA and Canada) Shimming
Shimming is not required when assembling the original lower case and inner parts Shimming is required when assembling the original inner parts and new lower case Shimming is required when replacing the inner parts4
Selecting the pinion shims
1Calculate the specified value (MO) as shown in the examples below