2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 16Get this manual
GENERAL INFORMATION SERVICE DATA Data 1015 R, TE, EL
CYLINDERPISTONPISTON RING
Cylinder distortion Piston to cylinder clearance Cylinder bore Cylinder measuring position Piston skirt diameter Piston measuring position Cylinder bore wear Piston ring end gap 1st Limit Limit mm (in) mm(in) mm(in) mm(in) mm(in) 0.05 (0.002) 0.02760.0425 (0.00110.0017) 0.100 (0 .0039) 58 .00058.015 (2.28352.2841) 50 (2.0) from cylinder top surface 57 .96557.980 (2.28212.2827) 15 (0.6) from piston skirt end 0.055 (0.0022) 0.100.25 (0.0040.010) 0.50 (0.020) 0.100.25 (0 .0040.010) 0.50 (0.020) Approx5.8 (0.23) 4.6 (0.18) Approx7.4 (0 .29) 5.9 (0.23) 0.020.06 (0.00080.0024) 0.10 (0 .004) 0.020.06 (0.00010.002) 0.10 (0.004) 1.211.23 (0.04760.0484) 1.211.23 (0.04760.0484) 2.512.53 (0.09880.0996) 1.171.19 (0.04610.0469) 1.171.19 (0.04610.0469) 0.0020.013 (0.000080.0005) 0.040 (0.0016) 13.99514.000 (0.55100.5512) 13.980 (0 .5504) 14.00214.008 (0.55130.5515) 14.030 (0.5524)