Volvo Penta AQ240A: A Robust Inboard Marine Propulsion Engine The Volvo Penta AQ240A is a high-performance, gasoline-fueled inboard engine engineered for reliable boat propulsion in marine environments. Produced during a brief window from 1976 to 1977, this V8-configured powerhouse represents Volvo Penta’s foray into gasoline inboard systems, delivering 225 horsepower (165 kW) of crankshaft power through its eight-cylinder architecture. While the AQ series is predominantly associated with diesel variants, the AQ240A’s gasoline setup—likely carbureted for efficient fuel atomization—offers a distinctive alternative for era-specific applications. Key technical specifications underscore its engineering prowess: an inboard drive system optimized for seamless hull integration, a compact V-form factor for space-efficient installation, and robust construction using marine-grade materials to combat corrosion from saltwater exposure. Although detailed metrics like displacement, weight, and RPM ranges are not documented, the engine’s design aligns with 1970s gasoline propulsion norms, emphasizing high-revving capabilities and torque distribution for stable vessel handling. In marine contexts, the AQ240A excels with its durability against vibrations, humidity, and propulsion stresses, ensuring longevity in demanding conditions. Its corrosion-resistant components and reliable powertrain minimize downtime, while the gasoline efficiency provides cost-effective operation compared to heavier diesel counterparts, balancing performance with operational economy. Performance-wise, the 225 hp output propels vessels to impressive speeds and enhances towing capacity, making it ideal for dynamic maneuvers in recreational or light commercial scenarios. This engine suits medium to large boats, such as fishing trawlers, sportfishing yachts, or coastal cruisers, where inboard stability and responsive throttle control are paramount. Backed by Volvo Penta’s renowned expertise in marine propulsion, the AQ240A blends vintage power with timeless reliability, though users should verify fuel compatibility for optimal integration with transmissions like the enigmatic “Back Extract” variant. For enthusiasts restoring classic vessels, it remains a testament to innovative inboard engineering. (Word count: 278)