Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 216Get this manual
SHIMMING (COUNTER ROTATION MODELS) (FOR USA AND CANADA)
2Adjust: Shim thickness (T2) Remove or add shim(s)
Available shim thickness 0.10, 0.12, 0.15, 0.18, 0.30, 0.40 and 0.50 mm NOTE: (M0) (M) should be as close to "0" as possible
SELECTING THE PROPELLER SHAFT SHIMS
NOTE: Find the shim thickness (T4) by selecting shims until the specified measurement is obtained with the special tool1Install: Shim(s) Thrust bearing Rear propeller shaft Tapered roller bearing Claw washer Ring nut 2Measure: Propeller shaft free play Out of specification AdjustPropeller shaft free play 0.30 0.05 mm (0.012 0.002 in) Magnetic base1 YU-34481 Dial gauge set YU-03097 3Adjust: Propeller shaft free play Remove or add shim(s)Available shim thickness 0.10, 0.12, 0.15, 0.18, 0.30, 0.40 and 0.50 mm