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 throughout.
| Specifications | |
|---|---|
| Weight | 260g (9.17oz) |
| Capacity | 4.07cc (0.248 cu.in.) |
| Bore | 18mm (0.709″) |
| Stroke | 16mm (0.630″) |
| Power Output | 0.84 ps (0.83 hp) |
| Practical RPM | 2,500 – 19,000 |
Spec
- Brand: OS Engines
- Part No: L-OS12662
- Format: Nitro 2 Stroke









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