This manual covers the Yamaha 90ETLJ, a 1986 outboard motor designed for marine propulsion. Engineered with a two-stroke gasoline engine producing 90 horsepower, this model exemplifies Yamaha's commitment to reliable and powerful marine performance. Its robust construction and efficient design make it a dependable choice for a variety of boating applications, ensuring consistent operation on the water. The comprehensive factory service manual provides detailed information essential for maintaining and repairing your Yamaha 90ETLJ. It includes step-by-step instructions for periodic inspections and adjustments, alongside in-depth coverage of the fuel system, power unit, lower unit, bracket unit, and electrical system. Troubleshooting guides, wiring and circuit diagrams, and exploded views are also featured, empowering owners and technicians to effectively diagnose issues and perform necessary maintenance, ensuring the longevity and optimal performance of the outboard motor.