This is the Magnum XL-FS120AR Four-Stroke Model Airplane Engine.
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
TWO YEAR warranty
INCLUDES: One Magnum XL-FS120AR Four-Stroke Model Airplane Engine with: parts
list, instruction manual, thread-on muffler, warranty card,
decal heet, three allen wrenches, and pressure tubing.
REQUIRES: : 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% with 20% castor
oil for break-in, no more than 15% 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/ 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:
Four-strokes are quieter
Four-strokes get better fuel economy
Four-strokes generate more torque and will swing a larger prop
Four-strokes have a more realistic sound
JXS 6/7/01
ir/jl
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