This manual covers the Yamaha 70ETLD outboard motor, manufactured in 1990. Engineered for marine propulsion, this gasoline-powered, internal combustion engine outboard motor is designed for reliability and performance on the water. Yamaha's commitment to quality is evident in the robust construction and advanced engineering of this model, ensuring dependable operation for a wide range of boating applications. The purpose of this Factory Service Repair Maintenance Manual is to provide comprehensive guidance for the maintenance, repair, and troubleshooting of your Yamaha 70ETLD outboard motor. It includes detailed information on general procedures, periodic inspections and adjustments, fuel system, power unit, lower unit, bracket unit, and electrical system. With step-by-step instructions, diagnostic support, and detailed illustrations, this manual is an essential resource for owners, technicians, and mechanics to ensure the longevity and optimal performance of the marine propulsion unit.