Suzuki DF200/DF225/DF250 V6 4-Stroke Outboards Service Manual, Page 363Get this manual
LOWER UNIT
LOWER UNIT GEARS- SHIMMING AND ADJUSTMENT
If lower unit has been rebuilt or has had components replaced, shimming for correct gear contact and backlash will have to be adjusted to ensure smooth, reliable operation of gearsShimWasherMounting position Numerical indexitem Pinion gear back-up shim Forward gear back-up shim Forward gear thrust washer Reverse gear thrust washer Reverse gear back-up shim Available thickness (mm)