The Yamaha EK40G and EK40J are 2005 model year outboard motors designed for marine propulsion. These 2-stroke engines, with a displacement of 49.0 cm³, deliver a power output of 40 HP and utilize unleaded gasoline mixed with oil at a 50:1 ratio. Featuring a CDI ignition system, water cooling, and a manual starter, these motors are engineered for reliability and performance on the water. Their robust construction and efficient design make them a dependable choice for a variety of boating applications.

This Service Repair Manual provides comprehensive information for the Yamaha EK40G and EK40J outboard motors. It covers essential maintenance procedures, detailed troubleshooting guides, technical specifications, and important safety guidelines. This manual is an indispensable resource for owners, mechanics, and technicians, offering the knowledge necessary to ensure optimal performance, longevity, and safe operation of the marine propulsion system.