This workshop service repair manual covers Volvo Penta TAMD61A and TAMD72J marine diesel engines. These robust engines are engineered for reliability and performance in demanding marine applications, featuring in-line 6-cylinder, 4-stroke, turbocharged, and intercooled diesel designs. The TAMD61A offers a displacement of 5.48 liters and an approximate power output of 235-255 hp, while the TAMD72J boasts a larger 6.72-liter displacement and an approximate power output of 350-380 hp. Both models incorporate advanced cooling, lubrication, and fuel injection systems, ensuring efficient operation and longevity. This comprehensive English-language manual provides detailed instructions for maintenance, repair, and troubleshooting. It includes step-by-step procedures with substeps, critical notes, cautions, and warnings, alongside detailed photos, illustrations, and diagrams, including wiring schematics. The manual is designed for both do-it-yourself owners and experienced mechanics, offering complete disassembly guidance to component level. Its purpose is to empower users with the knowledge and procedures necessary to maintain their engines effectively, ensuring optimal performance and extending service life while facilitating cost-effective repairs.