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O.S. Engines® 81FS-a Series 4-Stroke Engine

Features
  • 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.
O.S. Wintertime Savings Rebate
$30 Merchandise Certificate or $15 Cash Rebate on an O.S. Engines 81FS-a Series 4-Stroke Engine
Download PDF version of the rebate form. 208KB
To take advantage of this Manufacturer's Mail-In Rebate Offer you must download and print the Rebate Form above. Purchase by December 31, 2008.
Downloads Require Adobe Acrobate Reader 3.0 or Higher.Get Adobe Reader
Packing more power into 60-size planes!
O.S. Engines 81FS “a” Series 4-Stroke Engine
Specifications
Displacement: 0.81 cu in (13.26 cc)
Bore: 1.09 in (27.7 mm)
Stroke: 0.87 in (22.0 mm)
Weight w/muffler: 19.6 oz (556 g)
Output: 1.3 hp @ 11,000 rpm
Practical rpm range: 2200-12,000
Includes: 60RA carburetor, F-5030 muffler
81FS-a Series 4-Stroke Engine
       LW7583 ONLY       Buy Now Stock Status:
3 Easy Pay
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Prices shown were current at time of ad production and are subject to change.
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