O.S. Engines muffler adjusts in or out with threaded header pipe and rotates a full 360° for more mounting options with fewer modifications. Continuous lubrication system recirculates excess oil instead of venting it for better performance and longer engine life 60Y carburetor with longer venturi for leak-free seals, less fuel blow back and optimal air/fuel mixing. Two year limited warranty.

Fuel: 5-20% nitro content with at least 18% lubricant content
Propeller: Sport & Aerobatic 13 x 9-11, 14 x 8-10 Scale 15 x 8, 16 x 8
Electric starter and other field equipment