This Service Repair Manual covers the Volvo Penta TAMD61A, an inline 6-cylinder diesel marine engine. This turbocharged and aftercooled engine features a displacement of 5.48 L, a bore of 96 mm, and a stroke of 120 mm. It typically produces 227 hp (167 kW) at 2600 rpm with a torque of 750 Nm. The engine utilizes direct injection and can be configured for raw water cooling or freshwater cooling with a heat exchanger. Its robust engineering is designed for reliability in demanding marine applications. This manual provides comprehensive guidance for maintaining and repairing the Volvo Penta TAMD61A. It details general maintenance, troubleshooting procedures, engine service and repair, transmission service, and covers various systems including brakes, electrical, cooling, fuel injection, emission, and engine control. Additionally, it includes information on periodic lubrication, steering, chassis and body, suspension, axles, and wiring diagrams. This resource is intended to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of the marine engine.