OS 25 FX II + Echappement

Description

OS Engines 25FX .25 engine, with 20D carburetor and OS 892 Muffler

All FX engines come with remote needle valve - the feature most asked for!  A longer crankshaft provides more secure attachment for spinner, prop and nut.  Dual ball bearing construction adds durability and longevity. Semi-square head shape creates more fin area to increase cooling capacity. Each engine comes with a high-performance carburetor and muffler with adjustable exhaust direction and built-in pressure tap

Features

• Displacement (cu in): 0.249 / 4cc
• Bore (in): 0.710 / 18mm
• Stroke (in): 0.630 / 16mm     
• RPM: 2,500-19,000    
• Output (HP@rpm): 0.84 @ 18,000   
• Weight (oz): 8.8 / 249.5g
• Recommended Props : 9x5, 9x6, 9.5x5, 10x4, 10x5