1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 261Get this manual
LOWER UNIT 9-8
Inspect forward, reverse and pinion gear teeth and engaging dogsReplace gears if damaged or worn Inspect forward gear bearingReplace bearing if pitted, noisy or rough
PROPELLER SHAFT COMPONENTS
Inspect push rod, replace if worn, broken, or tip is flattened Inspect clutch dog shifterReplace if chipped, worn or damaged Inspect dog pinReplace if bent or worn Inspect propeller shaftsplinesReplace if worn, twisted or damaged