The O.S. Engines 81FS 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 venture that reduces the chance of fuel leaking out onto the cowl, while also creating more positive air/fuel flow.
SPECIFICATIONS
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: 19.63 oz (556 g)
Practical rpm range: 2200-12,000
Output: 1.3 hp @ 11,000 rpm
Includes: 60RA carburetor, F-5030
Retail
OSMG0981 81FS-a Series 4-Stroke Engine $549.99
Visit the O.S. Engines website at www.osengines.com
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