O.S. Engine OSMG0990 110FS-a Sport Scale Four-Stroke  [OSMG0990]

Performance and packaging with the O.S. Engine OSMG0990 110FS-a

For modellers after authentic scale performance, the O.S. Engine 110FS-a Four-Stroke brings noticeably more power while preserving a small footprint. It delivers roughly 12.5% more output than the FS-91SII, making it a neat upgrade for many models.

Internal lubrication that reduces external mess

The engine routes blow-by back into the lubrication circuit to feed internal components, reducing friction and service needs. This method keeps excess oil off the airframe and avoids complex oil drain arrangements on the cowl.

Rotatable muffler for tidy installation

The supplied F-5040 muffler can be rotated through 360 degrees so you can position the outlet where it suits your airframe best. The muffler produces a deep tone and the engine uses the same mount pattern as the FS-91SII for easy swaps.

Streamlined assembly and lower upkeep

With a reversible carburetor and a slimmer camshaft housing, the 110FS-a is easier to package and tune. Improved tolerances and an efficient design lower maintenance demands, letting pilots focus on flying and trim adjustments.

The O.S. Engine 110FS-a Four-Stroke suits scale and sport flyers who want realistic sound and reliable power in a compact engine that is straightforward to install and maintain.