This workshop service repair manual covers the Volvo AQ175, a V6 marine engine with a 3.5L displacement and engine code 229. Designed for marine applications, this engine is part of Volvo's lineup known for its robust engineering and reliability. The AQ175 features a closed cooling system with a heat exchanger and a distributor ignition system, contributing to its operational efficiency and durability in demanding marine environments. This comprehensive manual provides essential information for the maintenance and repair of your Volvo AQ175 engine. It details various procedures, technical specifications, and troubleshooting guidance necessary for optimal performance and longevity. The content is structured to assist owners, mechanics, and technicians in understanding the intricacies of the engine and its associated Inboard Marine Drive, ensuring proper upkeep and effective repairs.