Ushering in a new era in O.S. 4-stroke technology: the 56FS. It's the first in the "a" Series, with the latest advancements for boosting your plane's performance.

• Mounts with no-mod ease in the same space as the FS-52.
• In addition to less noise, the muffler features a multi-positional manifold with a rubber O-ring that helps prevent oil leakage.
• A newly designed lubrication system eliminates the need for crankcase ventilation.
• The 40NA carburetor is equipped with a venturi that reduces the chance of fuel leaking out onto the cowl, while also creating more positive air/fuel flow.

It's like giving your 40-size plane a new lease on life!

SPECIFICATIONS
Stock Number: OSMG0956
Displacement: 0.569 cu in (9.32 cc)
Bore: 0.945 in (24.0 mm)
Stroke: 0.811 in (20.6 mm)
Weight w/muffler: 16.26 oz (461 g)
Practical rpm range: 2400-13,000
Output: 1.0 ps @ 10,000 rpm
Includes: 40NA carburetor, muffler