This factory service manual covers the Suzuki DF90, DF100, DF115, and DF140 outboard motors manufactured between 2001 and 2009. These 4-stroke gasoline engines offer a horsepower range from 90 to 140 HP, designed for reliable performance in various marine applications. Their robust engineering ensures durability and efficiency for boat owners and operators. This comprehensive manual provides detailed information for maintenance and repair. It includes sections on general information, periodic maintenance, engine control systems, electrical components, fuel systems, power units, trim and tilt systems, lower units, and wire/hose routing. The manual facilitates complete tear-downs and rebuilds, offering part diagrams, torque specifications, and troubleshooting guidance, making it an essential resource for owners and technicians alike.