2006 Johnson SD 30 HP 4 Stroke Outboards Service Manual, PN 5006592, Page 221Get this manual
GEARCASE SHIMMING AND GEAR BACKLASH CHECKS
SHIMMING AND GEAR BACKLASH CHECKS
If the gearcase has been rebuilt or any internal components have been replaced, the gears must be properly shimmed and adjusted to ensure smooth, reliable operation of the gears
Temporarily fasten the driveshaft bearing housing to the gearcase using two (2) bolts and nuts placed through the two diagonally opposite gearcase mounting holes5
12345Pinion gear shim Forward gear shim Forward gear thrust washer Reverse gear thrust washer Reverse gear shim
1Bolts (2)
Hold the pinion gear by hand, then gently rock the forward gear back and forth by hand 001901
Pinion gear shim Forward gear shim Forward gear thrust washer Reverse gear thrust washer Reverse gear shim