Suzuki outboard motors 1988 2003 repair manual., Page 308Get this manual
8-40 LOWER UNIT On these models, all gears both spare and mounted, are subjected to tooth bearing adjustment at the factor and are marked with the difference in millimeters between the designed dimensions and the actual dimensionsAt the same time, the difference is stamped on the anti-ventilation plate (where the trim tab is mounted)When gears or the gearcase are replaced by new component, it is necessary to compare the values indicated on both the old parts and the new parts to determine the thickness of the shim to be used Transmission Gear Adjustment
# See Figures and 8
SHIM ADJUSTMENT PROCEDURE
# See accompanying illustrations
When only gears are replaced, shim adjustment should be made by comparing the values that are stamped on the gears1Pinion gear shim adjustmentWhen the actual dimension is larger than the standard dimension as shown in the illustration, the gear has "+ mm" mark on itOn the contrary, if smaller it has "- mm" markFor example, when the actual dimension is 0.2 mm longer, the pinion gear is marked "+0.2 mm"Accordingly, the thickness of the shim mounted is 1,O mm which is 0.2 mm thinner than the standard thickness of 1.2 mmFig3 Stamp mark location