PACKING MORE POWER AND PERFORMANCE INTO 60-SIZE PLANES!

The O.S. 81FS-a 4-Stroke Pumped Engine retains all the features of the existing 81FS-a but now includes a PD-08 fuel pump to deliver fuel consistently to the engine at all times, regardless of the plane's attitude, for more reliable performance and faster response. The 60RA 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. Perfect for aerobatics and other situations that demand high power!

• Specially designed lubrication system eliminates the need for crankcase ventilation.
• Rubber O-ring on the muffler's muti-positional manifold helps prevent oil leakage.
• Mounts easily in the same space as the FS-70SII with no modifications.

SPECIFICATIONS
Displacement: 0.809 cu in (13.26 cc)
Bore: 1.091 in (27.7 mm)
Stroke: 0.866 in (22.0 mm)
Engine weight: 20.11 oz (570 g)
Muffler weight: 1.9 oz (54 g)
Practical rpm range: 2,200-10,000
Output: 1.3 hp @ 10,000 rpm
Includes: 61R carburetor, F-5030 muffler

                                      Retail
OSMG0982 81FS-a 4-Stroke with Pump   $729.99

Visit the O.S. Engines website at www.osengines.com

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