Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 135Get this manual
CYLINDER BODY ASSEMBLY
3Measure: Cylinder bore diameter "D" (with cylinder bore gauge) Out of specification Replace
NOTE: Measure the cylinder bore diameter at three positions for both D1 and D2Then, average the measurements
Standard Cylinder 90.0090.02 mm bore diame(3.5433.544 in) ter "D" Taper limit T
Wear limit 90.1 mm (3.55 in) 0.08 mm (0.003 in) 0.05 mm (0.002 in)
Out of round limit R