This Service Repair Manual covers a comprehensive range of Outboard Motors, from 2.5 to 140 horsepower, including models such as the 2.5 A, 3.5 A/B, 5, 8, 9.8, 9.9 D/D2, 15 D/D2, 18 E/E2, 25 C2/C3, 30 A3/A4, 40, 40 D/D2, 50 D/D2, 60 B/C, 70 B/C, 80, 90, 115, 120, and 140. These outboard motors are engineered for reliability and performance in marine applications. This manual provides detailed information to ensure optimal operation and longevity of your engine. The purpose of this manual is to provide owners, mechanics, and technicians with the necessary information for effective maintenance and repair. It includes detailed sections on general information, tools and techniques, troubleshooting, lubrication, tune-up procedures, fuel and electrical systems, power head, gearcase, starter, and power trim and tilt systems. With real photo illustrations, diagrams, and wiring schematics, this 412-page manual is designed to facilitate efficient servicing and troubleshooting, enabling users to perform repairs and maintenance with confidence.