This manual covers the BFM 1012/E and BFM 1013/E series engines, including specific models such as the BF4M 1012, BF4M 1012 E, BF6M 1012, BF6M 1012 E, BF4M 1013, BF4M 1013 E, BF6M 1013, and BF6M 1013 E. These engines are designed for robust performance and reliability, suitable for a wide range of applications. This document provides comprehensive information to ensure optimal operation and longevity of your equipment. The purpose of this manual is to serve as a complete guide for owners, mechanics, and technicians. It details essential maintenance procedures, technical specifications, testing and setting data, and crucial safety regulations. By following the instructions and utilizing the provided job cards and explanations of symbols, users can effectively perform routine maintenance, diagnose issues, and execute repairs, thereby preventing premature failures and minimizing unnecessary costs.