This Service Repair Manual covers Yamaha outboard motors, specifically models 70ETLD, 70ETLF, 70ETLG, 70TLRP, 90ETLD, 90ETLF, 90ETLG, and 90TLRP, manufactured between 1988 and 1994. These engines, available in 70 HP and 90 HP variants, are designed for reliable performance in marine applications. The manual provides comprehensive information to ensure the longevity and optimal functioning of your Yamaha outboard motor. The purpose of this manual is to serve as a complete reference for maintenance, repair, and troubleshooting procedures. It details essential aspects such as general maintenance schedules, lubrication, fluid specifications, and in-depth coverage of all major systems, including cooling, fuel, electrical, ignition, exhaust, steering, and brakes. Furthermore, the manual includes specific guidance on engine and transmission service, diagnostic procedures, and wiring diagrams, making it an indispensable tool for owners, mechanics, and technicians.