This service manual covers Volvo Penta 3.0 - 8.2 GS Gi GSi marine engines. These V6 and V8 engines are known for their robust construction and reliable performance in demanding marine environments. The manual details various engine configurations, including specific engine codes for models such as the 30GSMEFS, 43GLPEFS, 50GLPEFS, 74GiPEFS, and 82GSiPEFS, along with dual propulsion drive systems like DPX385XEFS and DPX415XEFS. This comprehensive English-language service manual provides essential information for maintaining and repairing your Volvo Penta engine. It includes detailed, step-by-step repair instructions, diagnostic procedures, preventative maintenance schedules, and a troubleshooting guide. With zoomable illustrations, detailed component breakdowns, and included part numbers, this manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their marine propulsion system.