ASP FS120 19.6cc 4-stroke Engine for Nitro RC Planes

A  = ABC  Engine
SII = Rear Needle Valve Engine
FS = Four Stroke Engine
R = RINGED ENGINES

FEATURES:
* Dual ball bearing-supported crankshaft
* Choke system for easy starting
* CNC precision machining
* Steel cylinder liner and ringed piston for long life
* Rear-mounted updraft two needle valve carburetor
* TWO YEAR warranty

REQUIRES:
* Glow plug: Four-stroke glow plug only. Using a two-stroke glow plug can lead to erratic
operation and eventual engine failure.
* Fuel: Recommended by manufacturer, 10% nitromethane with 20% castor oil for break-in,
no more than 15% nitromethane and no less than 16% castor oil after break-in.
* Propeller: 15x6-break-in, 15x6, 15x8, 15x10, 16x6, 16x8.
* Starting and field equipment listed with airplane ACG.

SPECS:
* Distance between mounting holes on same side: 1.02" (26mm)
* Distance between mounting holes on opposite side: 2.24" (57mm)
* Width between mounting flanges: 2.64" (67mm)
* Height/bottom of crankcase to top of rocker cover: 5.5" (139.7mm)
* Height/center of crankshaft to top of rocker cover: 4.75" (120.6mm)
* Length/backplate to drive washer: 4.01" (102mm)
* Length/center of mounting flanges to drive washer: 3.03" (77mm)
* Length/carburetor to end of crankshaft: 7.07" (179mm)
* Displacement: 1.22cu.in (19.6cc)
* Bore: 1.19" (30.4mm)
* Stroke: 1.08" (27.5mm)
* Practical RPM: 2000-11000
* Weight (w/muffler) 31.08oz
* Crankshaft thread size: 5/16-24

COMMENTS:
Some differences between two and four-stroke engines:

1. Four-strokes are quieter
2. Four-strokes get better fuel economy
3. Four-strokes generate more torque and will swing a larger prop
4. Four-strokes have a more realistic sound

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