Suzuki - 4-Stroke Service Manual - DF4A / DF5A / DF6A - 99500-97L00-01E. Use this original Suzuki service manual to service applicable 4-stroke Suzuki outboard engine models. A comprehensive companion for any engine rebuild or maintenance task, this service manual includes engine specifications and step-by-step service procedures. Applies to the following Suzuki 4-stroke outboard models: DF4A (All Year Models) DF5A (All Year Models) DF6A (All Year Models)