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  • O. S. Engines 91HZ-R 3D Speed Black 61G w/Powerboost Pipe

    Product Number OSMG1982
    $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 3D Speed Helicopter Engine in Black with the 91 PowerBoost Tuned Pipe. ****** Because of the competition nature of this engine,...*More

    This is the O.S. Engines 91 HZ-R 3D Speed Helicopter Engine in Black with the 91 PowerBoost Tuned Pipe. ****** Because of the competition nature of this engine,****** ******it is NOT covered by the O.S. 2 Year Warranty.****** Carburetor Adjustments- High Speed Needle Valve: Turn approximately 30¦ (3-4 clicks) during initial adjustments, then approximately 15¦ (1-2 clicks) when making final adjustments Medium Speed Needle Valve: Turn approximately 30¦ (3-4 clicks) at a time Idle Mixture Control Screw: Turn approximately 5¦ at a time, turn left to enrich idle mixture and right to lean mixture Height from crankcase bottom to top of cylinder head: 3.9 (100mm) Height/bottom of mounting tab to top of cylinder head: 3.1 (79mm) Distance between mounting holes same side: 0.98 (25mm) Distance between mounting holes opposite side: 2 (52mm) Distance between muffler screw holes: 1.6 (42mm) Distance/bottom of mounting tab to muffler screw holes: 1.8 (42.8mm) Distance throttle lever to center of engine: 1.6 (42mm) Length from front bearing to center of engine: 2.2 (56.4mm) Length from front bearing to backplate: 3.3 (83.8mm) Length from backplate to end of crankshaft: 4.6 (118mm) Length from backplate to center of engine: 1.1 (27.4mm) Width of crankcase below mounting tabs: 1.7 (43mm) Width between mounting tabs: 2.4 (61mm) Pipe- Length: 12.3 (313mm) Diameter: 2.0 (50mm) at engine attachment point Exhaust Outlet Diameter: 0.20 (5mm) Weight: 7.9oz (225g) jxs 04/08/11 ir/jxs*Less

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    • Designed for all-out 3D competition DRS (Demand Regulator System) ensures a steady fuel supply for 3D flights 165¦ exhaust timing for optimal horsepower and stable hovering
    • Newly designed combustion chamber shaped to match the big bore carburetor and advanced exhaust cylinder timing 61G Big Bore twin needle carburetor is designed to develope stable horsepower at 70-80% throttle which is widely used in 3D flight
    • Bore:1.091 (27.7mm)
    • Crankshaft Size:5/16-24
    • Displacement:0.91cu in (14.9cc)
    • Power Output:3.6hp / 15, 500 RPM
    • Practical RPM Range:2, 000 - 16, 000
    • Stroke:0.976 (24.8mm)
    • Weight (w/o Muffler):21.27oz (603g)
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