The OS Max 25 Control Line Engine is a high-quality 2-stroke engine designed for use in airplanes and aircraft models. This engine features a .25 displacement and compatibility with nitro and glow fuel, making it suitable for advanced hobbyists and enthusiasts. With the added feature of an ignition engine conversion, this engine offers a unique and performance-enhancing capability for your RC model vehicle. Made by the reputable brand O.S. and originating from Japan, this engine is reliable and durable for extended use. Ideal for those aged 17 years and up, this engine is sure to enhance your flying experience.This is an older OS .25 converted to spark ignition by  Otto Bernhardt, specifically to compete in Society of Antique Modelers (SAM) Class B free flight events.