O.S. Engine OSMG0935 FS-120 Surpass III with Pump - 4-Stroke RC Aero Engine  [OSMG0935]

Reliable 4-Stroke Power for Serious RC Flight

For pilots who spend hours at the flying field, the O.S. Engine OSMG0935 FS-120 Surpass III with Pump delivers a solid balance of power and refinement. This 4-stroke unit is built to handle demanding flying tasks while keeping throttle control precise and predictable.

Improved Fuel Regulation and Noise Control

The FS-120 Surpass III features a regulating style pump that stabilises fuel flow for smoother response across the rev range. A larger, upgraded muffler reduces audible noise and helps maintain performance without sacrificing engine output.

Designed for Long Service Life

Robust engineering protects internal parts from wear: the rear ball bearing is greased and double-sealed, and key components such as the crank and cam shaft plus the piston ring are plated to resist corrosion. The reversible carburetor and black rocker cover add functional flexibility and a clean finish.

Whether flown for competition or weekend sport flying, the FS-120 Surpass III gives reliable, maintainable 4-stroke power for pilots who demand consistent performance.