This manual covers the Yamaha 90ETLD Outboard, a water-cooled gasoline engine from 1990. As a first-generation model, this 90 horsepower outboard motor is designed for reliable performance on various watercraft. Its robust engineering ensures durability for demanding marine applications. This service repair maintenance manual provides comprehensive information for owners and technicians alike, detailing the intricacies of this respected marine propulsion unit. The purpose of this English-language digital manual is to guide you through the complete service, repair, and maintenance of your Yamaha 90ETLD Outboard. It includes detailed procedures for disassembly, repair, assembly, and inspection, supported by exploded diagrams for clear part identification. Essential technical specifications, troubleshooting guidance, and safety precautions are also provided. This resource is indispensable for ensuring the optimal performance, longevity, and safe operation of your outboard motor.