O.S. Engine OSMG0981 81FS-a High-Performance 4-Stroke RC Engine  [OSMG0981]

O.S. Engine 81FS-a 4-Stroke Engine
Price:
USD$379.00
Brand:
O.S. Engine
Model:
OSMG0981
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Revitalize Your RC Airplane with the O.S. Engine 81FS-a 4-Stroke Powerhouse

The O.S. Engine 81FS-a, model number OSMG0981, is an exceptional choice for RC enthusiasts looking to upgrade their 60-size planes. This engine not only fits seamlessly into the space occupied by the FS-70SII without requiring modifications, but it also brings a significant boost in power and performance.

Innovative Design for Enhanced Performance

One of the standout features of the 81FS-a is its specially designed lubrication system, which eliminates the need for crankcase ventilation. This advancement ensures smoother operation and reduces maintenance concerns. The 60RA carburetor, equipped with a venturi, optimizes air and fuel flow, minimizing the risk of fuel leakage onto the cowl. Additionally, the rubber O-ring on the muffler's manifold prevents oil leaks, ensuring a cleaner running engine.

Specifications That Speak Volumes

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: 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

The O.S. Engine 81FS-a is ideal for hobbyists seeking robust power and reliability in their RC aircraft. Its innovative design and high-performance capabilities make it suitable for both casual flyers and competitive racers.

No, the 81FS-a mounts easily in the same space as the FS-70SII without modifications.
The practical RPM range is from 2,200 to 10,000.
The engine includes a 60RA carburetor and an F-5030 muffler.
The engine's lubrication system is designed to eliminate the need for crankcase ventilation, ensuring smooth operation.

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