OSMG1945   O.S.   .37 SZ-H Ring 

TECH NOTES
             This is the O.S. Max .37 SZ-H Ring Helicopter Engine.

FEATURES: Premium performance for 30-sized machines, from extreme aerobatics to
            stable hovering
          Same mounting pattern and muffler dimensions as the .32 SX-H, for
            easy installation in most 30-size helis
          Re-engineered crankshaft reduces vibration resulting in smooth power
            across the entire RPM range
          20M carburetor with idle needle positioned on same side as main
            needle for easier adjustments
          Two year limited warranty

INCLUDES: One O.S. Max .37 SZ-H Ring Helicopter Engine, with #8 glow plug,
            20M carburetor, instruction manual and sticker sheet

REQUIRES: Muffler
          Heli fuel with 10%-30% nitro content

SPECS     Displacement: 0.37 cu in (6.07cc)
          Bore:         0.806 in  (20.5mm)
          Stroke:       0.725 in  (18.4mm)
          Practical RPM range: 2000-21,000
          Output: 1.4 ps @ 18,000 rpm
          Weight: 10.3 oz (293g)
          Crankshaft Size: 1/4-28
          Distance between mounting holes same side:              0.6" (15mm)
          Distance between mounting holes opposite side:          1.5" (38mm)
          Width including mounting flanges:                       1.8" (45mm)
          Width neglecting mounting flanges:                      1.5" (38mm)
          Height/bottom of crankcase to top of cylinder head:     3"   (76mm)
          Height/bottom mounting flanges to top of cylinder head: 2.4" (61mm)
          Distance/center of crankcase to front bearing:          1.8" (46mm)
          Distance from backplate to front bearing:               2.6" (67mm)
          Distance from backplate to end of crankshaft:           3.7" (94mm)


ACCESSORIES
           THIS IS THE O.S. MAX .37 CU IN RINGED HELICOPTER ENGINE.
FEATURES: SAME MOUNTING PATTERN AND MUFFLER DIMENSIONS AS THE .32 SX-H, FOR
  EASY INSTALLATION IN MOST 30-SIZE HELIS, RE-ENGINEERED CRANKSHAFT REDUCES
  VIBRATION, INCLUDES #8 GLOW PLUG, 20M CARBURETOR
REQUIRES: 10%-30% HELI FUEL, MUFFLER & DRIVE HUB DEPENDING ON HELI