OS Max - OSMG0956
FS56-A Ring 40NA Carb F4040 Muffler
This is the O.S. Max FS-A .56 Four Stroke Engine.
Same mounting dimensions as the FS-52 Surpass.
FEATURES: Improvements over the original FS series include;
Elimination of crankcase venting-excess crankcase oil is now drawn
drawn into the rocker cover and injected back into the combustion
chamber
Stronger connecting rod wristpin and valve assembly
Extended intake tube on carburetor restrains the reverse flow of
the air/fuel mixture
Decreased width camshaft housing for less interference with sides
of aircraft nose section
F-4040 muffler with adjustable off-set and outlet direction for
easier cowl installations
40NA two needle carburetor
INCLUDES: O.S. Max FS-A .56 Four Stroke Engine with F-4040 muffler type "F"
header pipe glow plug instruction manual
REQUIRES: Fuel: 5-20% nitro with 18% lubricant content
Propeller: Sport & aerobatic; 13x6 12x6-8
Scale; 13x6-7 12x6-8
(break-in engine with prop intended for use on model)
Electric starter glow starter and field equipment
SPECS: Displacement: 0.569cu in (9.32cc)
Bore: 0.945 " (24.0mm)
Stroke: 0.811" (20.6mm)
Practical RPM: 2 400-13 000
Weight: 14.8oz (419g)
Crankshaft Size: 1/4-28
Break-in Needle Valve Settings: 2-2.5 turns from fully closed
Distance Between Mounting Holes Same Side: 0.69" (17.5mm)
Distance Between Mounting Holes Opposite Side: 0.16" (44mm)
Height from Crankshaft Center to Rocker Cover: 3.3" (84mm)
Distance from Crankcase Center to Prop Hub: 2" (50.3mm)
Distance from Crankcase Center to End of Crankshaft: 3.5" (88mm)
Distance from Crankcase Center to Throttle Lever Center:1.3" (32.5mm)
Width of Crankcase Below Mounting Tabs: 1.3" (34.1mm)
Angle of Muffler in Relation to Engine: 11?
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