This Service Repair Manual covers the K Series single-cylinder, air-cooled, 4-stroke gasoline engines, including models K91, K141, K161, K181, K241, K301, K321, and K341. These engines are known for their robust construction and reliable performance across a range of applications, providing power outputs that vary by specific model, from approximately 3.0 HP for the K91 to 14.0 HP for the K341. Features such as automatic compression release, forced air cooling, and various ignition and starting system options contribute to their efficiency and user-friendliness. This comprehensive English-language manual is designed to assist owners, technicians, and mechanics in maintaining and repairing their K Series engines. It provides detailed information on troubleshooting, disassembly and reassembly procedures, and the intricacies of various component systems including the air cleaner, fuel system, governor, electrical system, and starter system. With included diagrams and photos, this 137-page guide offers clear instructions for scheduled maintenance, lubrication, and other essential service tasks, ensuring the longevity and optimal performance of your engine.