2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 161Get this manual
POWERHEAD PISTON, CYLINDER, AND CRANKSHAFT Crankshaft Thrust Bearing Flange Thickness
Crankshaft Main Bearings
Inspect the crankshaft bearing shells for pitting, scratches, and wearReplace any damaged bearings
Standard
0.0972 to 0.0992 in(2.470 to 2.520 mm)
IMPORTANT: NEVER replace only one bearing shellBoth halves of the bearing must be replaced if either is worn or damagedCrankshaft thrust bearing flange
Inspect the crankshaft journals for wear and damage001569
Use micrometer to measure the crankshaft journal for out-of-round and taperIf any crankshaft journal is worn or damaged, or the out-of-round or taper exceeds the service limit, replace the crankshaftCrankshaft Journal Specifications 1.5741 to 1.5748 inStandard Diameter (39.982 to 40.000 mm) Out-of-Round and 0.0004 in(0.010 mm) Taper Service Limit