This workshop repair service manual covers all JLO Engine models and engines, including single-cylinder variants such as the L-99, L-230, L-227, L-295, R-295, L-297, L-300, and L-340, as well as twin-cylinder models like the LR-340/2, LR-399/2, LR-440/2, and LS-600/2. While specific production years are not detailed, this comprehensive English-language manual is designed to provide complete and intact information for these historical engines. This extensive manual, spanning hundreds of pages, offers detailed coverage of maintenance procedures, repair processes, and troubleshooting for all JLO engines. It includes critical technical specifications, dimensional data, wiring diagrams, and electrical troubleshooting guidance. Furthermore, it provides step-by-step instructions for disassembly, assembly, and service of various components, including the carburetor, ignition system, and recoil starter, with hundreds of detailed diagrams and illustrations to aid in understanding.