Engine O.S. – 72FS-a

The Tradition Continues…

Everyone knows about how the 56FS-a, 81FS-a and 110FS-a deliver superior 4-stroke
power and performance, as well as how they’ve revolutionized the engine industry.
Now, O.S. has filled in the missing link with the release of the 72FS-a. Pilots
of .60-sized aircraft can now enjoy such FS-a benefits as a blow-by internal
oil system. It eliminates the need for a crankcase and re-circulates excess
oil throughout the engine. No fuss…No muss…Just a first-rate engine that
sets new standards while continuing traditional O.S. quality. The 72FS-a Four-Stroke
?V only from O.S.

The adjustable F-5030 muffler can be rotated 360?X and moved in or out for
a perfect fit. Rich, deep sound is an added benefit.

A reversible carb and narrower camshaft housing simplify installation.

Tighter tolerances and updated engineering reduce maintenance and ease set-up.

Delivers more performance power to sport pilots and more realistic flight to
scale pilots.

Specifications:

• Stock Number: OSMG0877
• Displacement: 0.719 cu in (11.8 cc)
• Bore: 1.063 in (27 mm)
• Stroke: 0.811 in (20.6 mm)
• Weight w/muffler: 18.7 oz (530 g)
• Practical rpm range: 2,400-12,500
• Output: 1.2 hp @ 11,000 rpm
• Includes: 61N carburetor, F-5030 muffler & F glow plug