.37SZ-H Ring 20M Carb

This is the O.S. Max .37 SZ-H Ring Helicopter Engine.
(Two year limited warranty)

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

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)
Low speed needle 1 turn in from flush with carb body
High speed needle 1.5 turns out from closed