O.S. 91RZ-H DH Rear Exhaust OSMG1979
ITEM# 18510
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Description
O.S. 91RZ-H DH Rear Exhaust OSMG1979
Features
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O.S. 91RZ-H DH Rear Exhaust OSMG1979
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Diecast cylinder head
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Designed for Hirobo and other scale helicopters where engine must fit inside canopy to preserve heli's scale lines
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Ringed piston
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60M-C 3-needle carburetor with mid-range needle for precise adjustments
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Two year warranty
Specifications
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Needle Settings; High Speed Needle Valve: Two turns OPEN from fully closed
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Idle Mixture Control Screw: Factory setting
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Medium Speed Needle Valve: Two turns OPEN from fully closed
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Displacement: 0.912 cu in (14.95 cc)
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Bore: 1.091" (27.7mm)
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Stroke: 0.976" (24.8mm)
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Practical RPM: 2000-16,000
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Power Output: 3.3 ps @ 15,000 RPM
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Weight: 22.0oz (623g)
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Crankshaft Size: 5/16-24
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Distance Between Mounting Holes Same Side: 0.98" (25mm)
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Distance Between Mounting Holes Opposite Side: 2" (52mm)
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Distance From Back Plate to Front Bearing: 3.3" (83.8mm)
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Distance From Back Plate to Crankcase Center: 1.1" (27.4mm)
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Distance From Crankcase Center to Front Bearing: 2.2" (56.4mm)
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Distance From Crankcase Center to End of Crankshaft: 3.5" (88.7mm)
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Width at Mounting Tabs: 2.4" (61mm)
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Width of Crankcase Below Mounting Tabs: 1.7" (42.6mm)
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Distance from Throttle Lever to Center of Crankcase: 1.7" (42.5mm)
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Distance/Bottom of Mounting Tab/Top of Cylinder Head: 3.2" (81.2mm)
Package Contents
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O.S. 91RZ-H DH Rear Exhaust OSMG1979
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with #8 glow plug
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instruction manual
Requirements
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Fuel: Heli blend with 10-30% nitro content