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         This is the O.S. Max .91 RZ-H Rear Exhaust Helicopter Engine.

FEATURES: Aluminum cylinder head, anodized blue in color
          Designed for Hirobo and other scale helicopters where engine must fit
            inside canopy to preserve heli's scale lines
          Ringed piston
          60M-C 3-needle carburetor with mid-range needle for precise
            adjustments
          Two year warranty

INCLUDES: O.S. Max .91 RZ-H Rear Exhaust Helicopter Engine with #8 glow plug,
            instruction manual

REQUIRES: Fuel: Heli blend with 10-30% nitro content

SPECS:    Needle Settings;
            High Speed Needle Valve: Two turns OPEN from fully closed
            Idle Mixture Control Screw: Factory setting
            Medium Speed Needle Valve: Two turns OPEN from fully closed

          Displacement: 0.912 cid (14.95 cc)
          Bore: 1.091" (27.7mm)
          Stroke: 0.976" (24.8mm)
          Practical RPM: 2000-16,000
          Power Output: 3.3 PS @ 15,000 RPM
          Weight: 21.82oz (618g)
          Crankshaft Size: 5/16-24
          Distance Between Mounting Holes Same Side: 0.98" (25mm)
          Distance Between Mounting Holes Opposite Side: 2" (52mm)
          Distance From Back Plate to Front Bearing: 3.3" (83.8mm)
          Distance From Back Plate to Crancase Center: 1.1" (27.4mm)
          Distance From Crankcase Center to Front Bearing: 2.2" (56.4mm)
          Distance From Crankcase Center to End of Crankshaft: 3.5" (88.7mm)
          Width at Mounting Tabs: 2.4" (61mm)
          Width of Crankcase Below Mounting Tabs: 1.7" (42.6mm)
          Distance from Throttle Lever to Center of Crankcase: 1.7" (42.5mm)
          Distance/Bottom of Mounting Tab/Top of Cylinder Head: 3.4" (87.4mm)



– If you need more information, use these O.S. resources –

Click Here: Manufacturer's Product Web Page
E-mail: enginesupport@hobbico.com
Web Site: http://www.osengines.com/
Phone: 217-398-8970


 
Postal Address:
O.S.
3002 N. APOLLO DRIVE, SUITE #1
CHAMPAIGN, IL 61822  








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