2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 158Get this manual
POWERHEAD PISTON, CYLINDER, AND CRANKSHAFT Connecting Rod and Crankpin Install connecting rod (with bearing) on the crankshaft as shownUse thickness gauge to measure the connecting rod large bore side clearanceIf the measurement exceeds the service limit, replace the connecting rod andor the crankshaftConnecting Rod Large Bore Side Clearance 0.0039 to 0.0098 inStandard (0.100 to 0.0250 mm) 0.0138 in(0.350 mm) Service Limit
If any crankpin is worn or damaged, or the out-ofround or taper exceeds the service limit, replace the crankshaftCrankpin Specifications 0.870 to 0.874 inStandard Width (22.10 to 22.20 mm) 1.4166 to 1.4173 inStandard Diameter (35.982 to 36.000 mm) Out-of-Round and 0.0004 in(0.010 mm) Taper Service Limit