O.S. Engines, .25 FX NON-RINGED W/MUFFLER

Hobbies R Us

OSMG0525   O.S.   .25 FX Non-Ringed w/Muffler

TECH NOTES
      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: Remote Needle Attached to the Backplate keeps fingers away from prop
          Twin Ball Bearing-Supported Crankshaft
          Schnuerle Porting (Schnuerle scavenging)
          Non-Ringed (ABN) Construction
          Side Exhaust
          One-Piece Crankcase

INCLUDES: One Expansion Style Muffler
          One Set of Instructions, Decal, and Poster
          One Assembled .25 FX w/Carb

SPECS:    Displacement:  4.07cc (.2485 cu in)
          Bore: 18.0mm (.708")
          Stroke: 16.0mm (.630")
          Horsepower: .84 BHP at 18,000 RPM
          Weight: 248g (8.8oz)  10.8 oz 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" X 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

REQUIRES: Long Glow Plug (O.S. #8 recommended-OSMG2691)
          Fuel with 20% (minimum) lubricant content and 5%-15% Nitromethane
            (All the 5%-15% fuels we carry meet these requirements)

ACCESSORIES
THIS IS A .25 AIRPLANE ENGINE.  STARTING EQUIPMENT IS IN AIRPLANE ACG.
COMES WITH MUFFLER (WITH PRESSURE FITTING) AND REMOTE NEEDLE VALVE.
REQUIRES FUEL, FUEL FILTER, PROP, ENGINE MOUNT, AND GLOW PLUG.