81FS-a O.S. Engine 4-Stroke Engine

Packing more power into 60-size planes!

Mounts easily in the same space as the FS-70SII with no modifications.
A rubber O-ring on the muffler’s multi-positional manifold helps prevent oil
leakage.
The specially designed lubrication system eliminates the need for crankcase
ventilation.
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.

SPECIFICATIONS

• Stock Number: OSMG0981
• Displacement: 0.809 cu in (13.26 cc)
• Bore: 1.091 in (27.7 mm)
• Stroke: 0.866 in (22.0 mm)
• Weight w/muffler: 20.11 oz (570 g)
• Practical rpm range: 2,200-10,000
• Output: 1.3 hp @ 11,000 rpm
• Includes: 60RA carburetor, F-5030 muffler