This manual covers the Volvo AQ170 marine engine, produced during the 1970s and 1980s. This inline 6-cylinder engine, with a displacement of 3.0 liters, was engineered for reliable performance, delivering 182 horsepower (gross). Its robust construction and water-cooled system ensure durability in demanding marine environments. The AQ170 features a carbureted fuel system and a distributor-based ignition, contributing to its straightforward operation and maintenance. This Factory Service Repair Manual in English provides comprehensive guidance for the Volvo AQ170. It details essential maintenance procedures, including lubrication with SAE 30W oil (5 US quarts capacity) and the use of ethylene glycol-based coolant. Technical specifications cover ignition timing at 10 degrees BTDC and spark plug gap at 0.032-0.036 inches. The manual also includes information on the marine gearbox with forward, neutral, and reverse gears. This resource is designed to assist owners and technicians in maintaining and repairing the engine effectively.