This handbook provides comprehensive information for the BUKH DV-10 Marine Diesel Engine. Designed for marine propulsion, this engine is engineered for reliable operation and optimal performance. The BUKH DV-10, available in variants such as DV-10 L ME and DV-10 L SME, utilizes diesel fuel and offers starting options including electric start and hand starting, supported by a starting aid. Its robust construction and dependable performance make it a suitable choice for various marine applications. This manual serves as an essential guide for owners and technicians, detailing critical aspects of engine operation and maintenance. It covers a wide range of topics, including preparation for first use, operational procedures for starting, maneuvering, and stopping, as well as running-in instructions. Essential maintenance procedures for the air filter, fuel filter, lubricating oil sump, cooling system, lubricating oil system, marine gear, sail drive, and electrical system are thoroughly explained, including specific guidance on lubricating oil quality. Furthermore, the manual includes a troubleshooting guide for irregular operation and procedures for winter storage and preparation for launching.