This workshop service repair manual covers the Volvo AQ165, a marine engine featuring a 3.0L inline 6-cylinder engine that produces 152 horsepower. Engineered for reliability and performance, the AQ165 is designed for demanding marine applications. Its robust construction and water-cooled system ensure consistent operation in various conditions. This manual provides comprehensive information to support the longevity and efficiency of your Volvo AQ165. The purpose of this manual is to provide detailed guidance for the maintenance, repair, and troubleshooting of the Volvo AQ165. It includes essential technical specifications, diagnostic procedures for common issues such as starting problems, overheating, and performance loss, and outlines recommended maintenance practices for ignition and fuel systems, as well as belt inspection. This resource is intended for owners, mechanics, and technicians to ensure proper upkeep and effective repairs, facilitating optimal performance and safety.