O.S. Engine OSMG0877 72FS-a Classic Four-Stroke Aircraft Motor  [OSMG0877]

Reliable Four-Stroke Performance with the O.S. Engine 72FS-a

The O.S. Engine 72FS-a reflects the FS-a series tradition seen in models such as the 56FS-a, 81FS-a and 110FS-a. Its blow-by internal oil approach removes the need for a conventional crankcase, which simplifies oil handling and upkeep while keeping four-stroke characteristics intact.

Thoughtful Engineering for Cleaner Installations

Designed with a reversible 61N carburetor and a slimmer camshaft housing, the 72FS-a eases the fitting process in a range of cowl layouts. The included F-5030 muffler rotates 360 degrees so you can adjust exhaust exit and sound without compromise.

Performance That Matches .60-Size Airframes

Operating effectively between 2,400 and 12,500 rpm and delivering 1.2 hp at 11,000 rpm, this engine suits both sport flying and scale applications. Enhanced machining and tighter tolerances reduce the need for frequent adjustments and improve overall reliability.

For modellers seeking a dependable four-stroke for .60-size aeroplanes, the O.S. Engine 72FS-a blends familiar FS-a traits with refinements that reduce maintenance and improve integration.