This comprehensive parts manual catalog for the Franklin Aircraft Engine 150, model 6A4-150-B3 / A3, covers all components of this engine. The manual, spanning 25 pages, provides detailed information on each part, including its description, specifications, and 1968 pricing. Whether you are a mechanic, aircraft owner, or enthusiast, this manual is a valuable resource for identifying and ordering the right parts for your Franklin 150 engine.

The Franklin Aircraft Engine 150, specifically the 6A4-150 model, is a renowned and highly respected powerplant in the world of aviation. This four-cylinder, horizontally opposed, air-cooled engine was a staple in light aircraft during the mid-20th century, known for its robust construction, reliability, and smooth operation. Developed by the Franklin Engine Company, it boasted a displacement of 150 cubic inches (2.46 liters) and a power output ranging from 100 to 150 horsepower, depending on the specific configuration. The 6A4-150 engine found its home in various popular aircraft, including the Piper J-3 Cub, the Cessna 140, and the Aeronca Chief, contributing to their success and affordability. Beyond its practicality, the engine's design earned a reputation for its simplicity, making it relatively easy to maintain and repair, further solidifying its popularity among pilots and mechanics alike. The Franklin 150's legacy extends beyond its performance and reliability. It is a testament to the ingenuity and craftsmanship of the era. The engine’s meticulous engineering, durable components, and efficient air-cooling system contributed to its endurance and widespread adoption. Despite the passage of time, the Franklin 6A4-150 remains in service with many aircraft enthusiasts, proving its enduring value and charm. The parts manual catalog, a crucial resource for owners and maintainers, offers a comprehensive guide to the engine's intricate workings. With detailed illustrations, technical specifications, and step-by-step instructions, it allows for accurate diagnosis, repair, and maintenance, ensuring the engine continues to perform at its peak for many years to come. The availability of these manuals, even today, speaks to the long-term commitment to supporting this classic engine, ensuring its legacy continues to inspire generations of pilots and aviation enthusiasts.