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    105HZ Heli Engine

    TECH NOTES
    This is the 105HZ 1.05 cu in Helicopter Engine from O.S. Engines.
    FEATURES: Same mounting dimensions as a .90 cu in engine
    Machined blue anodized aluminum heatsink cylinder head
    Velocity stack increases airflow and enhances engine performance
    Backplate accepts the Futaba BPS-1 RPM sensor for the GY701 and
    CGY750 gyros
    Ideal bore and stroke ratio for lowest vibration
    Two year limited warranty through Hobby Services beginning at date of
    purchase
    INCLUDES: 105HZ 1.05 cu in Helicopter Engine with 61E Carburetor
    #8 Glow Plug
    Air Funnel
    0.1mm Head Gasket
    0.2mm Head Gasket (installed)
    Instruction Manual
    REQUIRES: Fuel: Heli blend with 15% nitro content
    Glow starter and field equipment
    SPECS: Displacement: 1.048 cu in (17.17 cc)
    Bore: 1.142" (29mm)
    Stroke: 1.024" (26mm)
    RPM Range: 2,000 - 16.500
    Output: 3.7 ps @ 15,000 RPM
    Weight: 21.03oz (596g)
    Crankshaft Size: UNF 5/16-24
    Carburetor Settings;
    High Speed Needle Valve: Approx. 2 turns open from fully closed
    Medium Speed Needle valve: 1 turn open from fully closed
    Idle Mixture Control Screw: At basic position when engine left
    factory
    Distance/Center of Mounting Holes Same Side: 0.98" (25mm)
    Distance/Center of Mounting Holes Opposite Side: 2.04" (52mm)
    Crankcase Width Below Mounting Tabs: 1.7" (43mm)
    Crankcase Width at Mounting Tabs: 2.4" (61mm)
    Width from Throttle Arm to Center: 1.6" (42mm)
    Height from Bottom of Mounting Tabs to Cylinder Head: 3.1" (79mm)
    Height/Bottom Mounting Tabs to Muffler Mounting Holes: 1.7" (42.8mm)
    Height/Bottom of Crankcase to top of Cylinder Head: 3.9" (99mm)
    Length from Backplate to Front Bearing: 3.2" (82.6mm)
    Length from End of Crankshaft to Center of Engine: 3.5" (88.7mm)
    jxs 01/30/12
    ir/jxs

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