This comprehensive service repair manual provides detailed instructions for servicing and maintaining Yanmar engines used in John Deere 322, F912, and F932 lawn and garden tractors. The manual includes step-by-step instructions, illustrations, and photographs to guide you through every repair and troubleshooting procedure. You'll find complete information on repair, servicing, and preventative maintenance, giving you the confidence to keep your lawn tractor running smoothly. The manual covers the following Yanmar engines: 3TG66 and 3TG72. This manual is ideal for DIY enthusiasts and professionals alike, offering the same level of detail and information used by mechanics and workshops.