2003 ST 4 Stroke 9.9/15HP Johnson outboards Service Manual, Page 109Get this manual
POWER UNIT SERVICE DATA Data J1015 R, TE, EL
Item CYLINDERPISTONPISTON RING
Cylinder distortion Piston to cylinder clearance 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) 0.10- 0.25 (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) 1.21 -1.23 (0.04760.0484) 1.211.23 (0.04760.0484) 2.512.53 (0 .09880.0996) 1.17 -1.19 (0.0461 -0.0469) 1.17 -1.19 (0.0461 -0.0469) 0.0020.013 (0.000080.0005) 0.040 (0.0016) 13.995 -14.000 (0.55100.5512) 13.980 (0.5504) 14.002 -14 .008 (0.55130.5515) 14.030 (0.5524)