This Service and Repair Manual covers the Volvo Penta MD22, TMD22, and TAMD22 series diesel engines. These in-line 4-cylinder engines, with a displacement of 2.8 liters, are known for their robust engineering and reliability in marine applications. The MD22 is a naturally aspirated model producing 48 hp, while the TMD22 offers 64 hp with turbocharging, and the TAMD22 delivers 76 hp with turbocharging and intercooling. These engines are designed for demanding use, featuring indirect cooling systems and compatible with various marine gearboxes. This manual provides comprehensive guidance for the maintenance and repair of your Volvo Penta engine. It details essential procedures for engine settings, lubrication, fuel, cooling, and electrical systems, along with specific information on the cylinderhead, piston, crankshaft, and cylinder block assemblies. Included are electrical diagrams and technical data to assist owners, mechanics, and technicians in ensuring optimal performance and longevity of the MD22, TMD22, and TAMD22 engines.