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.25FX ABL Glow Single

.25FX ABL Glow Single

In Stock - Allow 2-3 Days for Processing

Item:   OS MG0525
Price: $129.99 
Item Qualifies for Free Ground Freight (48 States) on Orders Over $250
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.25FX ABL Glow Single with Muffler, by OS Engines

O.S. has Updated the .25 SF with this New High-Performance .25 FX. This Engine may be used in Sport and Aerobatic Aircraft. The FX is Designed to Use a Muffler or Tuned Pipe. Comes with a 2-Year Warranty.

Features an Advanced Bi-Metallic Liner. This process uses a double layer of plating material, rather than one thicker layer. This helps the metal to bond to the cylinder, and is more durable. Also, the plating process is more consistent, resulting in a more precise fit between piston and sleeve, for better compression, longer life.
  • Remote Needle Attached to the Backplate keeps fingers away from prop
  • Twin Ball Bearing-Supported Crankshaft
  • Schnuerle Porting (Schnuerle scavenging)
  • Side Exhaust
  • One-Piece Crankcase
INCLUDES: Expansion Style Muffler, Instructions, Decal, Poster, Assembled .25 FX w/Carb

REQUIRES: Long Glow Plug (O.S. #8 recommended OSMG2691), Fuel with 18% (minimum) lubricant content and 5%-15% Nitromethane, (All 5%-15% fuels we carry meet these requirements)
  • Displacement: 4.07cc (.2485 cu in)
  • Bore: 18mm (.708")
  • Stroke: 16mm (.630")
  • Horsepower: .84 BHP at 18,000 RPM
  • Weight: 248g (8.8oz) 10.8oz w/muffler
  • Length: 75.6mm (2.98") distance from the backplate to drive washer
  • Width: 30mm(1.18") width of engine neglecting engine mounting flanges 38mm (1.50") distance between centers of the mounting holes
  • Height: 75.5mm (2.97")
  • Crankshaft Thread Size: 1/4-28
  • Recommended Props: Pattern Flying: 9x5, 9x6; Pattern Flying if a tuned pipe is used: 9.5x5
  • Sport Flying: 9x5, 9x6, 9.5x5, 10x4, 10x5
  • Practical RPM Range: 2,500 - 19,000 RPM
  • High Speed Needle: 1.5 - 2 turns out from fully closed
  • Low Speed Needle: 2mm gap between the needle and spray bar at full throttle (looking down the neck of the carb)
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