This manual covers the Volvo AQ255 marine engine, powered by a 350 V8 engine with a 5.7L displacement. Designed for marine applications, this engine is known for its robust construction and reliable performance. The AQ255, coupled with its stern drive system and tilt/trim functionality, represents a capable and enduring powertrain for various boating needs. Its engineering prioritizes durability and efficiency, making it a trusted choice for boat owners. This Factory Service Repair Manual in English provides comprehensive guidance for the maintenance, repair, and rebuilding of your Volvo AQ255 marine engine. It includes detailed step-by-step instructions, hundreds of illustrations, diagrams, photos, and detailed wiring diagrams to assist with all aspects of service. The manual covers advanced troubleshooting, tuning, and general maintenance procedures, enabling owners to perform servicing and potentially save on labor costs. Its structured format, including a numbered table of contents and search functionality, ensures efficient access to the information needed to keep your engine in optimal condition.