The Volvo AQ125A is a robust marine engine from the AQ series, featuring an inline 4-cylinder configuration with a displacement of 2.1 liters (128.1 cubic inches) and capable of producing 130 horsepower. Designed for marine applications, this water-cooled engine typically utilizes a carbureted fuel system and is paired with a marine gearbox, driving an inboard system. Its engineering emphasizes reliability and performance, making it a trusted choice for various maritime activities. This Workshop Service Repair Manual provides comprehensive official factory service information for the Volvo AQ125A. It covers essential maintenance procedures, detailed troubleshooting guides, critical technical specifications, and vital safety guidelines. This manual is an indispensable resource for owners, mechanics, and technicians, offering the knowledge required to effectively maintain, service, and repair the AQ125A engine, ensuring its continued optimal operation.