This manual covers the Suzuki DF 90, DF 100, DF 115, and DF 140 outboard motors manufactured in 2003. These 4-stroke marine propulsion units are engineered for reliable performance and efficiency. Their digital engine control systems ensure optimal operation across various conditions, making them a dependable choice for a wide range of marine applications. This Service and Repair Manual provides comprehensive guidance for maintaining and troubleshooting your Suzuki outboard motor. It details essential procedures for periodic maintenance, engine control systems, electrical components, fuel systems, and various mechanical units including the power, mid, and lower units, as well as power trim and tilt functions. This resource is designed to assist owners, technicians, and mechanics in ensuring the longevity and optimal performance of their equipment.