This Service Repair Manual covers the Kohler K Series engines, a line of single-cylinder, air-cooled, 4-stroke OHV engines known for their robust design and reliability. The K Series encompasses multiple engine models, including the K91, K141, K161, K181, K241, K301, K321, and K341, each offering varying displacement and power output suitable for a wide range of applications. These engines feature magneto ignition, mechanical governors, and carburetor fuel systems, with many models equipped with automatic compression release and manual retractable starters for efficient operation. This comprehensive English-language manual is designed to provide owners, mechanics, and technicians with the necessary information to maintain and repair their Kohler K Series engines. It includes detailed sections on general information, special tools, periodic maintenance, troubleshooting, and specific component systems such as the air intake, fuel, and electrical systems. Furthermore, the manual guides users through disassembly, inspection, repair, and reassembly procedures, ensuring that all aspects of engine upkeep are covered to maximize performance and longevity.