2006 SD Johnson 4 Stroke 9.9-15HP Outboards Service Manual, Page 157Get this manual
POWERHEAD CYLINDERCRANKCASEPISTON ASSEMBLY Measure the cylinder bore in the thrust and axial directions at three depth positions A, B, and CThe difference between the two depth measurements is the cylinder bore taperThe difference between the axial and transverse measurements is the cylinder bore out-of-roundThe service limit for cylinder bore wear os 0.0022 in(0.055 mm)If either taper or out-of-round measurement exceeds service limit, rebore or replace cylinderSubtract the piston skirt measurement from the cylinder bore measurement to determine clearanceCylinder bore: Standard: 2.2835 to 2.2841 in(58.000 to 58.015 mm) Piston skirt diameter: Standard: 2.2821 to 2.2827 in(57.965 to 57 .980 mm) Piston to cylinder clearance: Standard: 0.0011 to 0.0017 in(0.0276 to 0.0425 mm) Service limit: 0.0039 in(0.100 mm)