O.S. Engine OSMG0877 72FS-a Sport Scale Four-Stroke Engine  [OSMG0877]

O.S. Engine 72FS-a Delivers Smooth Four-Stroke Torque

The O.S. Engine 72FS-a continues the brand's heritage of robust RC engines, following models like the 56FS-a, 81FS-a and 110FS-a. It incorporates a blow-by internal oil system so there is no traditional crankcase, which helps reduce routine servicing while maintaining smooth combustion cycles.

Compact Layout for Easier Mounting

The unit features a reversible 61N carburetor and a reduced-width camshaft housing to assist tidy installations in tight cowlings. The F-5030 muffler is adjustable through 360 degrees, letting you orient the exhaust for clearance and preferred sound tuning.

Engine Characteristics for Scale and Sport Flying

With a working RPM span from 2,400 to 12,500 and a power rating of 1.2 hp at 11,000 rpm, the 72FS-a gives ample performance for many .60-size airframes. Updated tolerances and simplified servicing help minimise time spent on adjustments and oil handling.

For pilots seeking a user-friendly four-stroke for .60-size models, the O.S. Engine 72FS-a combines familiar FS-a traits with practical updates that cut maintenance and improve fitment.