This workshop repair service manual covers the Volvo Penta 2001, 2002, 2003, and 2003T marine diesel engines. These engines are known for their robust construction and reliable performance in demanding marine environments. Featuring approximately 1.8-liter displacement, they offer power outputs ranging from 18 hp for the 2001 model to 36 hp for the turbocharged 2003T variant. The engines utilize either raw water or fresh water cooling systems and are designed for efficient diesel fuel operation. This comprehensive manual provides detailed information essential for the maintenance, repair, and troubleshooting of these Volvo Penta engines. It includes procedures for routine maintenance tasks such as oil and filter changes, alongside guidance on common issues related to starting, cooling, fuel systems, and electrical systems. Technicians and owners will find the technical specifications and step-by-step instructions invaluable for ensuring the optimal performance and longevity of their marine diesel engines.