This manual covers the Yamaha 175ETLG outboard motor, manufactured in 1988. This powerful engine features an inline 4-cylinder, water-cooled configuration, delivering 175 horsepower through a carbureted fuel induction system. Its robust design, incorporating a CDI ignition and an impeller water pump, ensures reliable performance for various marine applications. The outboard gearcase, with a 1.75:1 gear ratio, is engineered for efficient power transfer and durability. This professional factory service repair maintenance manual provides comprehensive guidance for the Yamaha 175ETLG. It details essential maintenance procedures, including lubrication specifications for the gearcase and recommended spark plug types and gaps. Technical specifications cover engine and electrical systems, such as alternator output and cooling system details. The manual is presented in English with step-by-step procedures, exploded diagrams, and searchable content, designed to assist owners and technicians in maintaining and repairing the unit effectively and safely.