This manual covers the Suzuki DF 90, DF 100, DF 115, and DF 140 outboard motors from the 2002 model year. These 4-stroke marine propulsion units are engineered for reliability and performance, offering a range of horsepower options to suit various boating needs. Their robust construction and advanced design ensure efficient operation and durability in demanding aquatic environments. The purpose of this Service and Repair Manual is to provide comprehensive guidance for maintaining and repairing these Suzuki outboard motors. It details essential procedures, including periodic maintenance, troubleshooting, and in-depth coverage of key systems such as the engine control system, electrical components, fuel system, power unit, mid unit, lower unit, and power trim and tilt. This resource is designed to help owners and technicians ensure optimal functioning and prevent future issues.