O.S. 25LA .25 Glow Engine w/Muffler


This is the OS Engines 25LA .25 glow engine, with 20H carburetor and included OS E3020 Muffler.


  • More cooling fin area extends the life of the engine, and virtually eliminates engine seizures in the air
  • Added "webbing" on the crankcase strengthens high-stress areas to help ensure that they stand up to the rigors of learning to fly
  • Overall tighter needle valve fit utilizes an "O" ring to help maintain the performance levels you need
  • A fuel inlet that points up allows for easier fuel line access for fueling and defueling


  • Engine: 25LA   
  • Displacement (cu in): 0.2485 (4.0cc)
  • Bore (in): 0.7087 (18mm)
  • Stroke (in): .63 (16mm) 
  • RPM: 2,500-16,000 
  • Output ([email protected]): 0.6 @ 15,000
  • Weight (oz): 6.9 (197g)
  • Recommended Props: 9x5, 9x6, 10x5

This product was added to our catalog on February 11, 2009.

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