The Yamaha 4LH Outboard Motor, manufactured in 1987, is a robust 4-stroke, in-line 4-cylinder marine propulsion device engineered for reliability and performance. Designed for demanding marine environments, this outboard motor represents a significant advancement in Yamaha's commitment to quality engineering, offering dependable power and efficiency for a wide range of maritime applications. Its robust construction and thoughtful design ensure it meets the needs of users requiring a dependable and capable marine propulsion system. This comprehensive Service Repair Maintenance Manual provides detailed guidance for the Yamaha 4LH Outboard Motor. It covers all aspects of the unit, from routine maintenance to in-depth repair procedures, presented in a clear, step-by-step format. The manual includes exploded diagrams to aid in disassembly and reassembly, ensuring that owners, mechanics, and technicians have the necessary information to maintain and repair the motor effectively, maximizing its operational lifespan and performance.