Suzuki 2002-2005 DF4/DF5/DF6 4-Stroke Outboards Service Manual, Page 141Get this manual
8-20 LOWER UNIT Optimum tooth contact The optimum tooth contact is shown in the figureA shim adjustment may be necessary in order to obtain the optimum tooth contact patternOptimum tooth contact
The backlash of the gear should be checked when increasing or decreasing the thickness of the shim to adjust tooth contactExample (1) Incorrect top side toe contact: Correction measures: Decrease the thickness of the forward gear shim Slightly increase the pinion gear shim thicknessEXAMPLE OF INCORRECT Top side toe contact