The Volvo Penta AQ151 is an inboard sterndrive engine designed for marine applications. This inline 4-cylinder gasoline engine features a displacement of 2.3 liters, a bore of 96 mm, and a stroke of 80 mm, with a compression ratio of 8.7:1. It delivers a maximum power of 148 hp (110 kW) and 200 Nm of torque. The engine is equipped with a Solex 36/40 PII-4 carburetor and an electronic ignition system, cooled by a water-cooled system. It is paired with a Volvo Penta 270/280/290 gearbox. This Service Repair Manual (WSM) provides comprehensive guidance for the Volvo Penta AQ151. It covers essential maintenance procedures, technical specifications, and troubleshooting information to ensure optimal performance and longevity of your marine engine. This manual is an indispensable resource for owners, mechanics, and technicians seeking to maintain and repair the AQ151, offering detailed instructions and diagrams.