O.S. Engine OSMG0877 72FS-a High Torque Four-Stroke Aircraft Engine  [OSMG0877]

O.S. Engine OSMG0877 72FS-a for Consistent Flight Performance

The O.S. Engine 72FS-a demonstrates the maker's focus on durable, well engineered RC powerplants. Following the lineage of the 56FS-a, 81FS-a, and 110FS-a models, this iteration uses proven four-stroke principles and a blow-by internal oil system that removes the need for a conventional crankcase, cutting down routine servicing.

Installation-Savvy Mechanical Design

Key features include a reversible 61N carburetor and a slimmer camshaft housing that make mounting and alignment easier for field work. The included F-5030 muffler rotates a full 360 degrees so you can route exhaust and fit the silencer where it works best, while producing a full, realistic engine tone.

Well Suited to Sport Flyers and Scale Enthusiasts

Whether you prefer sport flying or scale realism, the 72FS-a offers a practical operating band of 2,400 to 12,500 rpm and a rated output of 1.2 hp at 11,000 rpm to match many .60-size airframes. Tightened tolerances and updated components reduce service intervals so you spend more time flying.

The O.S. Engine 72FS-a is a dependable choice for hobbyists who want a solid four-stroke for .60-size models, offering straightforward setup and reliable service life.