This workshop service repair manual covers the Volvo AQ130 marine engine, a 2.0L inline 4-cylinder engine with a displacement of 121 cubic inches and an advertised power of 130 horsepower. Designed for marine applications, this engine is known for its robust construction and reliable performance. Its engineering prioritizes durability and efficiency, making it a trusted choice for boat owners and operators. The AQ130 features a carbureted fuel system and a distributor ignition system, typical for its era, and is configured for various marine drive units. This comprehensive manual provides essential information for the maintenance, service, and troubleshooting of your Volvo AQ130 engine. It details critical procedures, including lubrication, cooling system service, and spark plug specifications, along with common issues such as carburetor tuning and ignition system faults. Technical data on electrical systems, compression ratios, and ignition timing are also included. This resource is designed to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of their marine engine through accurate and detailed guidance.