This manual covers the Yamaha 175ETLH Outboard, a 1987 model year 2-stroke, inline 4-cylinder outboard motor. With a displacement of 2142cc and producing 175 horsepower, this water-cooled engine is designed for marine propulsion. Its robust engineering and reliable performance have made Yamaha a trusted name in marine power. This service repair maintenance manual provides comprehensive information to ensure optimal operation and longevity of your outboard. The purpose of this English-language manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of the Yamaha 175ETLH Outboard. It includes step-by-step procedures, exploded diagrams, and technical specifications to assist owners, mechanics, and technicians. Key areas covered include lubrication, service intervals for components like spark plugs and water pump impellers, tune-up procedures for the CDI ignition system, and operational settings. By following the instructions within this manual, users can effectively maintain their outboard and address potential issues.