O.S. Max .50 SX-H Ring Hyper Helicopter engine is ideal for use in any 50 class helicopter. New head design offers improved combustion efficiency for stable hovering and aerobatic flight. Large 0.39" (10mm) diameter carburetor intake for greater running stability. Two year limited warranty. Same mounting dimensions as the O.S. Max .46FX-H. This product includes one O.S. Max .50 SX-H Helicopter Engine with Hyper Cooling Head, 60LH carburetor, decal sheet, #8 glow plug, instruction manual.

10% to 30% nitro Fuel with at least 18% lubricant (Helicopter Mix)
Starting equipment