This service repair workshop manual provides comprehensive information for the Volvo AQ125A, a 4-cylinder inline gasoline engine with a displacement of 2.1 L and an approximate power output of 130 hp. Designed for marine propulsion, this engine is engineered for reliability and performance. While specific model years are not detailed, this manual covers all modifications, ensuring broad applicability for owners and technicians. The purpose of this manual is to guide users through all aspects of maintaining and repairing the Volvo AQ125A. It covers essential service procedures, routine maintenance schedules, troubleshooting common issues, and provides detailed technical specifications. By following the instructions and guidelines within this English-language manual, owners and professional mechanics can effectively ensure the longevity and optimal performance of their marine propulsion system.