This service repair manual covers the Suzuki DF Series Outboard models, specifically the DF90, DF100, DF115, and DF140, produced between 2001 and 2009. These four-stroke engines, ranging from 90 to 140 horsepower, are engineered for reliable performance on the water. This manual provides comprehensive information to ensure these outboards operate at peak condition, reflecting Suzuki's commitment to quality and durability in marine propulsion. The purpose of this manual is to serve as a complete guide for the service and repair of your Suzuki DF Series Outboard. It details maintenance schedules, lubrication requirements, ignition system specifications, and fuel system procedures for both carburetor and EFI models. Furthermore, it includes extensive troubleshooting guidance for common engine issues, component overhaul procedures for the power and lower units, electrical system service, and engine control system diagnostics. With detailed technical specifications, torque values, required tools, and clear diagrams, this manual empowers owners and technicians to effectively maintain and repair their outboard for optimal performance and longevity.