This manual covers the Yamaha 40ESF outboard motor, produced in 1989. Designed for marine propulsion, this 40-horsepower, 2-stroke gasoline engine exemplifies Yamaha's commitment to engineering quality and reliability. Its robust construction and efficient design make it a dependable choice for various boating applications. This comprehensive service repair maintenance manual provides detailed information essential for the upkeep and repair of your Yamaha 40ESF. It includes procedures for disassembly, repair, assembly, and inspection, along with exploded diagrams to aid in understanding. Maintenance topics such as recommended service intervals, oil types, capacities, and inspection schedules are thoroughly covered, ensuring your outboard motor operates at peak performance.