Suzuki 2002-2005 DF4/DF5/DF6 4-Stroke Outboards Service Manual, Page 142Get this manual
LOWER UNIT 8-21 CHECKING REVERSE GEAR Check the reverse gearpinion gear shimming as shown below1Re-check your hand feeling when rotating the driveshaft in condition of the optimum forward gear tooth contact(See the page 8-18 and 8-19) 2Install the following parts to the propeller shaft Reverse gear thrust washer Reverse gear Reverse gear backup shim 3Install the propeller shaft and housing assembly to the gearcase with the two bolts4Rotate the driveshaft clockwise, then compare your hand feeling with the feeling in the step If you feel that the rotating load is almost same as the load in the step 1, the reverse gearpinion gear shimming is right If you feel that the load is larger, reduce the reverse gear backup shim thicknessCHECKING PROPELLER SHAFT THRUST PLAY After adjusting all gear positions, measure the propeller shaft thrust playPropeller shaft thrust play0.20 0.40 mm (0.008 0.016 in)