The paper explores various aspects and applications of additive technologies, with a particular focus on the production of replacement parts for outboard motors. The introductory section provides a basic understanding of 3D technologies, including their working principles, history, development, and different types of 3D printing. Furthermore, additive technologies in various industries such as aerospace, automotive, healthcare, architecture and construction, and maritime are analyzed. Special attention is given to additive technologies for producing replacement parts for outboard motors, with a detailed review of the types of technologies, materials used, and practical examples of their application. Techniques of 3D scanning and the principle of reverse engineering, which are crucial for optimizing the shape and functionality of replacement parts, are also described.The paper thoroughly examines the process of creating a replacement part for an outboard motor, starting from the description of the faulty part, through 3D scanning and shape optimization, to the actual 3D printing and final processing. The concluding section analyzes the performance of the replacement part, including a comparison with the original part, software stress testing, and real-world testing. A cost analysis provides insights into the time and costs associated with 3D scanning, optimization, and printing, as well as the cost-effectiveness compared to traditional methods. The paper concludes with a summary of key findings and implications for future applications of additive technologies.