This manual covers the Yamaha 4LH outboard motor, manufactured by Yamaha Motor Corporation in Japan. Produced in 1987, this internal combustion, gasoline-powered marine propulsion unit represents a significant engineering achievement from its era. The 4LH model is designed for reliable performance in marine environments, reflecting Yamaha's commitment to quality and durability in its products. This comprehensive Service Repair Maintenance manual is presented in English and is bookmarked and searchable for ease of use. It details all aspects of the motor, including step-by-step disassembly, repair, assembly, and inspection procedures, accompanied by exploded diagrams. The manual provides extensive coverage of routine maintenance operations and offers a handy reference for mechanics, ensuring the continued optimal performance and longevity of your Yamaha 4LH outboard motor.