This service manual provides comprehensive information for the Yamaha E40G and E40J outboard motors. These 2-stroke, gasoline-powered motors are designed for marine propulsion, delivering 40 horsepower with a displacement of 703 cc. Engineered for reliability and performance, they feature a water-cooled system, CDI ignition, and carburetor fuel induction, operating within a wide-open throttle range of 4500-5500 RPM. The transmission system includes Forward, Neutral, and Reverse gears, driven by an outboard drive system with a splined propeller shaft.

This manual is intended to assist owners, mechanics, and technicians in maintaining and repairing the Yamaha E40G and E40J outboard motors. It covers essential maintenance procedures, including lubrication with recommended Yamaha Outboard Gear Oil, and details scheduled maintenance intervals and inspection points. Technical specifications, troubleshooting guidance, and information on the electrical charging system are also provided. The content is presented in Spanish to ensure accessibility for a broad range of users.