2002/2003 Johnson SN/ST 2 Stroke 3.5, 6 8 HP Outboards Service Manual, PN 5005466, Page 151Get this manual
POWERHEAD INSPECTIONALL MODELS Use feeler gauge to check groove side clearance of the piston ringsInstall each ring on its pistonWith the ring fully seated in its groove, make several checks around the piston
3.5 MODELS
Use "V" block and two dial indicators to check crankshaft off-center at upper and lower journalsRotate crankshaft on blockMovement of indicators must not exceed 0.001 in(0,05 mm)Replace crankshaft assembly if movement exceeds this dimension
3.5 MODELS
The side clearance must not exceed 0.0026 in(0,065 mm)12Upper journal Lower journal