Albin AD-2 Marine Diesel Engine: Reliable Inboard Propulsion for Compact Vessels The Albin AD-2 is a robust, diesel-powered inboard marine engine engineered for dependable propulsion in small to medium-sized boats. As a compact 4-stroke diesel unit from Albin Motor, it delivers consistent power while prioritizing fuel efficiency and longevity in demanding aquatic environments. Key technical specifications underscore its engineering precision: This inline-twin cylinder configuration features a displacement of 1,044 cm³ (1.044 L), with a bore of 82 mm and stroke of 90 mm, creating an oversquare design for enhanced high-RPM performance. It boasts a high compression ratio of 17.5:1, optimizing thermal efficiency in its 4-stroke diesel cycle. Electric starting ensures effortless ignition, while the integrated reduction gear at 2.04:1 ratio adapts engine speeds to propeller requirements. Weighing just 225 kg (496 lbs), the AD-2 operates on diesel fuel, with a minimum idle speed of 550 RPM and a maximum of 2,200 RPM. Power output is rated at 20 hp (14.7 kW) SAE net and 16 hp (11.9 kW) DIN net, making it compliant with international marine standards. For marine applications, the AD-2 excels with corrosion-resistant sealed components and vibration-damping inline architecture, mitigating the effects of saltwater exposure, humidity, and constant motion. Its diesel design eliminates spark plug fouling risks, reduces emissions, and provides superior low-end torque for precise maneuvering, all while minimizing noise and vibration through the reduction gear for smoother onboard comfort. Performance-wise, the engine offers flexible cruising capabilities, with efficient fuel combustion enabling extended range on coastal voyages. The high compression ratio and low-RPM operation curb wear, promoting reliability without frequent maintenance—no carburetors or complex fuel systems to contend with. Ideally suited for sailing yachts, tenders, and day boats up to 15–20 meters, the Albin AD-2 is a space-efficient choice for inland and coastal cruising, where its balance of power, economy, and durability ensures confident, hassle-free navigation. (Word count: 278)