This manual covers the Yamaha 4LF outboard motor, manufactured in 1989, designed for marine propulsion. Yamaha is renowned for its commitment to engineering excellence, delivering reliable and high-performance products. The 4LF model embodies this dedication, offering robust construction and dependable operation for its intended use on the water. This professional factory service repair maintenance manual provides comprehensive guidance for owners and technicians. It details disassembly, repair, assembly, inspection operations, and all aspects of maintenance and repair for the motor. The manual is presented in a step-by-step, easy-to-read format, serving as a handy reference with completely bookmarked and searchable content, including exploded diagrams before disassembly sections.