This manual covers the A, B, J, and K Series Outboard Motors manufactured between 1969 and 1980. These reliable water-cooled, 2-stroke outboard motors offer a range of power outputs suitable for various recreational boating applications. Engineered for durability and consistent performance, these units typically feature magneto ignition and integrated gearcases, with starting systems ranging from manual recoil to optional electric start. Proper maintenance and understanding of their specifications are key to ensuring their longevity on the water. This comprehensive service manual provides essential information for the maintenance, repair, and troubleshooting of your outboard motor. It details critical procedures such as lubrication, ignition system servicing, fuel system maintenance, and cooling system upkeep, including recommended intervals for key components like water pump impellers. Technical specifications, including engine configurations, fuel mixing ratios, and propeller details, are also included, empowering owners and technicians to keep these engines running efficiently and reliably.