This workshop service repair manual covers Kohler K91 Series Single Cylinder Engines, encompassing the K91, K141, K161, K181, K241, K301, K321, and K341 engine families. These air-cooled, single-cylinder engines are known for their robust construction and reliable performance, making them suitable for a wide range of industrial and agricultural applications. The displacement and horsepower vary across the series, offering versatile power solutions. This comprehensive manual provides detailed instructions for the maintenance, repair, and troubleshooting of your Kohler engine. It includes essential information on disassembly and assembly procedures, fuel system and governor adjustments, lubrication, and air intake systems. By following the guidelines within this manual, owners and technicians can ensure the optimal performance and longevity of their Kohler engines.