This comprehensive service, repair, and maintenance manual for the 1987 Yamaha PRO 50 LH outboard motor provides a detailed guide for mechanics. The manual features a step-by-step format, making it easy to follow and understand. Each chapter includes exploded diagrams before the disassembly sections, ensuring clear identification of proper procedures for disassembly and assembly. The manual thoroughly covers every aspect of the motor, offering comprehensive explanations for all disassembly, repair, assembly, and inspection operations. It serves as an invaluable resource, enabling mechanics to efficiently and accurately maintain and repair the 1987 Yamaha PRO 50 LH outboard motor.

The 1987 Yamaha PRO 50 LH outboard motor was a powerful and reliable option for smaller boats seeking dependable performance. This two-stroke engine, boasting a displacement of 49.9 cubic centimeters, generated an impressive 50 horsepower, making it suitable for a range of activities, from fishing and waterskiing to leisurely cruising. The "LH" designation indicates the motor's left-hand rotation, meaning the propeller turns counterclockwise when viewed from the stern of the boat. This configuration is particularly common for outboards mounted on the port side of the transom.

The PRO 50 LH was renowned for its simplicity and durability. Built with Yamaha's signature quality, this outboard featured a single cylinder design coupled with a CDI (Capacitive Discharge Ignition) system, ensuring efficient and reliable ignition. The engine also incorporated a manual start system, promoting ease of use and minimizing reliance on electrical components. The 1987 model year saw several updates, including advancements in the cooling system and improvements to the overall design for enhanced performance and fuel efficiency. This model was a popular choice for individuals seeking a robust and well-performing outboard motor that offered a balance of power and affordability.