2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 164Get this manual
POWERHEAD PISTON, CYLINDER, AND CRANKSHAFT The starboard side of the cylinder block has four (4) stamped code lettersThe letters A, B, and represent the following bearing holder inside diameter shown belowCrankshaft Bearing Holder Diameter (without bearing)
the following thickness (measured at the center of the bearing)Color Mark Bearing Thickness
Green Black No color Yellow Blue
0.0768 to 0.0787 in(1.996 to 2.000 mm) 0.0787 to 0.0789 in(1.999 to 2.003 mm) 0.0788 to 0.0790 in(2.002 to 2.006 mm) 0.0789 to 0.0791 in(2 .005 to 2.009 mm) 0.0791 to 0.0792 in(2.008 to 2.012 mm)
1.7323 to 1.7325 in(44.000 to 40.006 mm) 1.7325 to 1.7328 in (40.006 to 40.012 mm) 1.7328 to 1.7330 in(40.012 to 40.018 mm)