This is the O.S. Engines FSA-56II Four Stroke Engine with the F-4040 Silencer. Mount the FSa-56II in your model, and see the difference advanced O.S. 4-stroke technology makes! Those benefits include a higher performance ceiling for sport flyers and more realistic flight for scale pilots. Plus, you’ll also enjoy rich, deep sound that will enhance your flying experience.
O.S. Engines FSA-56II Engine, F-4040 Silencer, Type F Glow Plug,
40NA Carburetor and Manual
Fuel: 10%-20% nitromethane with 18% lubricant. Synthetic, castor, or
a synthetic/castor lubricant blend may be used.
NOTE: Certain four-cycle fuels cannot be used due to low oil content
However, SOME four-cycle fuels such as the Wildcat 4-Cycle 15%
(CATP9109) may be used due to its 18% oil content.
When choosing fuels for this engine, be sure to select a fuel with
at least an 18% lubricant content.
Propeller: Sport & Aerobatic, 13x6, 12x6, 12x7, 12x8
Scale, 13x6, 13x7, 12x6, 12x7, 12x8
Displacement: 0.569 cu in (9.32cc)
Bore: 0.945" (24mm)
Stroke: 0.811" (20.6mm)
Engine Weight: 13.9oz (394g)
Output: 1.0 ps/0.99 hp @ 10,000 RPM
Practical RPM: 2,400 - 13,000
Crankshaft Thread Size: 1/4 x 28
Carburetor Needle Settings: