The Volvo AQ225 is a robust 5.0L V8 marine engine designed for reliable performance in a variety of watercraft. Engineered with a cast iron block and cylinder heads, this engine family is known for its durability and consistent power output, typically around 225 horsepower. It features a carbureted fuel system, commonly utilizing Holley or Rochester carburetors, and a distributor with electronic ignition for efficient combustion. The AQ225 is paired with various Volvo Penta sterndrives and gearboxes, making it a versatile option for marine applications where dependable power and longevity are paramount. This Workshop Service Repair Manual provides comprehensive guidance for the Volvo AQ225 marine engine. Covering essential areas such as service, maintenance, and troubleshooting, this English-language manual is an indispensable resource for owners, technicians, and mechanics. It details critical procedures, technical specifications, and recommended maintenance schedules, including information on lubrication, cooling systems, ignition, and fuel systems. By adhering to the instructions within this manual, users can ensure optimal performance, longevity, and safe operation of their AQ225 marine engine.