Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 217Get this manual
SHIMMING (COUNTER ROTATION MODELS) (EXCEPT FOR USA AND CANADA)
SELECTING THE PINION SHIMS
NOTE: Select the shim thickness (T3) by using the specified measurement(s) and the calculation formulaSelect: Shim thickness (T3) Selecting steps (1) Measure (M3)Digital caliper 90890-06704 NOTE: Install the bearing housing 1, thrust bearing 2, and washer 3(2) Install the pinion and pinion nutPinion nut 145 Nm (14.5 kgf, 105 ft lb)