This manual covers the Yamaha 150ETLH, a 150 horsepower, two-stroke gasoline outboard motor manufactured in 1987. Designed for repair, maintenance, and service, this model exemplifies Yamaha's commitment to robust engineering and reliable performance. Its powerful output and efficient design make it a capable unit for various marine applications. This Factory Service Manual provides comprehensive guidance for the upkeep and repair of your Yamaha 150ETLH. It details general information, periodic inspections and adjustments, and specific procedures for the fuel system, power unit, lower unit, bracket unit, and electrical system. With step-by-step instructions, detailed diagrams, illustrations, photos, and exploded views, this manual equips owners, mechanics, and technicians with the necessary knowledge for effective diagnostics, troubleshooting, and maintenance.