Selva Dolphin 15: Reliable Outboard Propulsion for Marine Applications The Selva Dolphin 15 is a robust outboard marine engine engineered by Selva for dependable boat propulsion, delivering 15 horsepower (11 kW) of crankshaft power through a compact, twin-cylinder 4-cycle configuration. Ideal for small to mid-sized vessels, this engine combines efficiency and ease of use to enhance on-water performance in diverse marine environments. Key technical specifications underscore its engineering excellence: a 323 cm³ displacement powers the two-cylinder design, operating smoothly within a 4,500–5,500 RPM range. Weighing just 45 kg (99 lbs), it features a freshwater cooling system for optimal thermal management, a 13/27 reduction ratio for precise torque delivery, and versatile starting options—manual pull-start or electric ignition—for reliable operation in any condition. As a 4-cycle engine, it eliminates the need for fuel-oil premixing, promoting cleaner combustion and reduced emissions. In marine-specific applications, the Dolphin 15 excels with its lightweight portability, which improves boat trim, fuel economy, and maneuverability on the water. The freshwater cooling system minimizes salt corrosion and simplifies maintenance by avoiding seawater intake complexities, extending component lifespan in harsh saltwater conditions. Its balanced crankshaft ensures vibration-free operation, while the 4-cycle architecture delivers superior fuel efficiency and lower noise levels, making it compliant with environmental standards and user-friendly for extended outings. Performance-wise, the engine’s wide RPM band supports versatile operation—from low-speed trolling to efficient planing—thanks to the optimized reduction ratio that balances low-end torque with top-end speed. This results in smooth power delivery and enhanced propulsion efficiency across varying loads. Suited for recreational boating, coastal fishing, or tender duties on larger yachts, the Selva Dolphin 15 offers cost-effective durability and practicality, empowering operators with a low-maintenance solution for reliable marine propulsion. (Word count: 278)