2003 Johnson ST 55 HP WRL 2 Stroke Commercial Service Repair Manual, P/N 5005483, Page 193Get this manual
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GEARCASE DRIVES HAFT SHIMMING holesReplace the bearing housing and repeat check if variance exceeds 0.004 in(0.010 mm)Check the squareness of the pinion to the driveshaft by holding the shim gauge bar