The O.S. Engine 25FX II is a high performance side exhaust aero engine that is suitable for many styles of small R/C aircraft such as sport, scale, aerobatic and even .25 class pylon racers.
The 25FX II uses a direct needle 21L carburettor for excellent usability and a 892 silencer with adjustable exhaust direction.
O.S.'s legendary standard of build quality is evident through out
