O.S. Engine OSMG0956 56FS-a 4-Stroke Upgrade for 40-Size RC Airplanes  [OSMG0956]

Next-generation 4-stroke for 40-size models

The O.S. Engine OSMG0956 56FS-a brings a practical performance step for pilots flying 40-size aircraft. This alpha-series 4-stroke packs key refinements while fitting into the same mounting footprint as the earlier 52FS, making installation straightforward for those swapping engines.

Key design highlights for dependable operation

The 56FS-a features a redesigned muffler with a multi-positional manifold and a rubber O-ring to reduce oil seepage and lower noise. Its updated lubrication architecture removes the need for crankcase venting, simplifying maintenance and improving dependability on the field.

Carburetion tuned for efficient burn

This engine uses the 40NA carburetor with an improved venturi to cut fuel dribble and steady the air/fuel flow, giving more consistent combustion and responsive throttle performance across the rpm band.

For RC pilots who want a cleaner-running, easier-to-install 4-stroke for 40-size airframes, the O.S. Engine OSMG0956 56FS-a is a solid choice that balances usability and performance.