Suzuki 2002-2005 DF4/DF5/DF6 4-Stroke Outboards Service Manual, Page 140Get this manual
LOWER UNIT 8-19 Checking and adjusting tooth contact pattern (Pinion and Forward gear) Check tooth contact pattern by using the following procedure1To assess tooth contact, apply light coat of Prussian Blue on the convex surface of the forward gear2Install the propeller shaft, the forward gear thrust washer and the housing assemblyDo not install the following parts Reverse gear and related shimwasher Push rod Push rod pin