2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 318Get this manual
3A-24 Right Hand Rotation Unit:
Lower Unit GearsShimming and Adjustment
If the lower unit has been rebuilt or has had components replaced, shimming for the correct gear contact and backlash will have to be checked andor adjusted to ensure smooth, reliable operationShimWasher and Mounting Position Item Pinion gear back up shim Forward gear back up shim Forward gear thrust washer Propeller shaft reverse thrust washer Reverse gear back up shim Available thickness (mm) 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.05, 1.10, 1.15 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00 3.0 0.5, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.05 Design specification thickness (mm) 1.0 1.0 3.0 1.3 1.0