This manual covers the Yamaha 150ETLG outboard motor, manufactured in 1988. This powerful motor features an in-line 4-cylinder engine with a displacement of 2596cc, producing 150 horsepower. It is equipped with triple carburetors for fuel delivery and a CDI ignition system for reliable starting. The water-cooled engine utilizes through-propeller exhaust and offers electric start functionality, complemented by a 16-amp alternator. For enhanced control and maneuverability, it includes power trim and tilt capabilities and operates with an outboard drive and a 2.00:1 gear ratio. This Factory Service Repair Maintenance Manual provides comprehensive coverage of all motor operations. It is meticulously organized with step-by-step procedures and detailed exploded diagrams to guide users through maintenance, repair, and troubleshooting. The manual is fully bookmarked and searchable, ensuring quick access to information on engine specifications, lubrication requirements, recommended fuel types, and more. Its purpose is to assist owners, mechanics, and technicians in effectively maintaining and repairing the Yamaha 150ETLG, ensuring its optimal performance and longevity.