This Service and Repair Manual covers Kohler single-cylinder engines, specifically models K91, K141, K161, and K1181. These engines are engineered for reliability and performance in various applications. This manual provides comprehensive information designed to assist users in understanding and maintaining these robust power units. The purpose of this English-language manual is to facilitate all repairs, servicing, and troubleshooting procedures for the specified Kohler engine models. It contains hundreds of pages of detailed content, including step-by-step instructions, detailed photos, diagrams, and exploded diagrams. This resource is suitable for both professional mechanics and technicians, as well as owners seeking to perform maintenance. The manual can be printed, offering flexibility for use in workshop environments.