Produces up to 10% more horsepower than a .46 size engine and fits in the same size mounting space.
One-piece metal remote needle valve can be positioned vertically or horizontally to adapt to in-cowl or side-mount applications.
Crankshaft supported by low drag, high-speed dual ball bearings.
Universal fuel inlet nipple is rotatable for easier access.
Ringed piston construction insures long engine life.

O.S. Max .50 SX Aerobatic Sport Airplane Engine.
Displacement: 0.499 cu.in. /8.17cc
Bore: 0.866 in / 22mm
Stroke: 0.847 in / 21.5mm
Horsepower: 1.8 @ 17,000 rpm
Practical RPM Range: 2,000-17,000
Weight: 13.76oz / 390g (without muffler)
Crankshaft size: 1/4-28
Suggested props: 11x6-10,12x6

MOUNTING DIMENSIONS:
Distance between mounting holes on same side: 0.69" (17.5mm)
Distance between mounting holes on opposite side: 1.73" (44mm)
Height from bottom of crankcase to top of cylinder head: 3.50" (89mm)
Height from center of crankcase to top of cylinder head: 2.77" (70.5)
Length from needle valve to end of crankshaft: 4.76" (121mm)
Width at mounting flanges: 2.04" (52mm)
Width at crankcase: 1.42" (36mm)

INCLUDES:
1 x O.S. Max .50 SX Aerobatic Sport Airplane Engine with 40B carb.
1 x #8 glowplug.
1 x #873 muffler with 3mm x 35mm socket head cap screws.
1 x instruction book
1 x decal sheet

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