This Service Repair Manual provides comprehensive information for Kohler K Series Single Cylinder Engines, including models K91, K141, K161, K181, K241, K301, K321, and K341. These engines are known for their robust design and reliability, making them suitable for a wide range of applications. While specific production years are not detailed, the manual covers various engine specifications such as single-cylinder configuration, gasoline fuel type, air-cooled operation, and magneto ignition systems, catering to diverse user needs and equipment requirements. The purpose of this manual is to serve as an authoritative guide for maintaining and repairing your Kohler K Series engine. It includes detailed sections on preventative maintenance, troubleshooting common issues, and technical specifications relevant to each model. Owners, mechanics, and technicians will find essential information on procedures such as oil changes, filter replacements, and spark plug service, ensuring optimal performance and longevity of the engine. The manual is presented in English and is designed to be a practical resource for all service-related tasks.