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  • O. S. Engines .91HZ-R 3C Speed Red 61F

    Product Number OSMG1980
    $0.00

    y Please allow 5-7 days for free in store pick up or flat rate shipping.
    1/10 Desert Truck Rtr
    qty $0.00

    This is the O.S. Engines 91 HZ-R 3C Speed Helicopter Engine in Red. ****** Because of the competition nature of this engine,****** ******it is NOT covered by th...*More

    This is the O.S. Engines 91 HZ-R 3C Speed Helicopter Engine in Red. ****** Because of the competition nature of this engine,****** ******it is NOT covered by the O.S. 2 Year Warranty.****** jxs 04/08/11 ir/jxs*Less

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    • Demand Regulator System ensures consistent fuel delivery from full to empty 170¦ exhaust timing for optimal horsepower and stable hovering
    • Designed for all-out F3C competition
    • Newly designed combustion chamber shaped to match the big bore carburetor and advanced exhaust cylinder timing 0.456 (11.6mm) Big Bore carburetor for greatest power needed for F3C maneuvers
    • Bore:1.09 (27.7mm)
    • Crankshaft Size:5/16-24
    • Displacement:0.91cu in (14.9cc)
    • Distance between mounting hole centers same side:0.98 (25mm)
    • Distance/center of muffler screw holes:1.6 (42mm)
    • Distance/mounting hole centers opposite side:2 (52mm)
    • High Speed Needle:Two turns open from fully closed
    • Idle Mixture Control:At basic position when engine leaves factory
    • Length from backplate to end of crankshaft:4.5 (116mm)
    • Length from front bearing to backplate:3.3 (84mm)
    • Medium Speed Needle:One turn open from fully closed
    • Output:3.6 PS, 3.55 HP @ 15500 RPM
    • Practical RPM Range:2, 000-16, 500
    • Stroke:0.98 (24.8mm)
    • Weight (w/o Muffler):21.2oz (603g)
    • Width between mounting tabs:2.4 (61mm)
    • Width of crankcase below mounting tabs:1.7 (43mm)
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