This Service and Repair Manual provides comprehensive guidance for Yamaha E115A, 115B, and 140B outboard motors. Designed for service and repair, these motors are engineered for reliable performance in marine applications. This manual details essential information to ensure optimal operation and longevity of your Yamaha outboard. This English-language manual covers a wide range of topics, including specifications, general information, periodic checks and adjustments, fuel system, power unit, bracket unit, electrical system, lower unit, and wiring diagrams. It features detailed disassembly and reassembly instructions, inspection and testing procedures, lubrication guidelines, tuning procedures, and a dedicated troubleshooting section. The manual is searchable and bookmarked for efficient navigation, assisting owners and technicians in maintaining and repairing their Yamaha outboard motors.