This manual covers the Volvo Penta TAMD72WJ-A, an in-line 6-cylinder, 4-stroke engine designed for marine applications. Featuring a turbocharged and intercooled aspiration system, this engine offers a displacement of 5.46 liters and a maximum power output of approximately 300-350 HP. Its robust construction, direct injection fuel system, and indirect cooling system are indicative of Volvo Penta's commitment to engineering quality and reliability. This engine is engineered for demanding operational environments, providing dependable performance for a variety of marine vessels. The purpose of this comprehensive Full Service Repair Manual is to provide detailed guidance for the maintenance, repair, and technical understanding of the Volvo Penta TAMD72WJ-A engine. It includes essential information on engine specifications, lubrication, cooling systems, fuel systems, and transmission details, alongside a complete service schedule. This manual is an indispensable resource for owners, mechanics, and technicians, enabling them to perform routine maintenance, diagnose issues, and execute repairs effectively, ensuring the longevity and optimal performance of the engine.