O.S. Engine OSMG0561 61FX Sport Flyer Powerplant  [OSMG0561]

O.S. Engine 61FX
Price:
NZD$404.47
Brand:
O.S. Engine
Model:
OSMG0561
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Reliable performance from the O.S. Engine OSMG0561 61FX

The O.S. Engine 61FX is engineered for sport and contest pilots who need a stable, serviceable engine. This O.S. Engine unit combines proven construction with user-friendly features that help you get the most from your model.

Cooling design and rugged build

The semi-square head increases the fin area to improve heat dissipation, keeping operating temperatures in check during sustained running. Dual ball bearings are fitted to reduce mechanical stress and improve rotational smoothness under load.

Tuning options for different flight styles

Equipped with a precision carburetor and a muffler that allows exhaust direction adjustments and includes a pressure tap, the 61FX supports detailed tuning. The remote needle valve offers two mounting positions so you can preserve the appearance of the cowl while accessing fine fuel adjustments.

Specifications

  • Displacement: 0.607 cu in
  • Bore: 0.945 in
  • Stroke: 0.866 in
  • Practical RPM: 2,000-17,000
  • Output: 1.90 hp @ 16,000 rpm
  • Weight: 19.4 oz
  • Recommended Props: Tuned Pipe: 12x9, 12x10, 12x11; Sport: 12x6, 12x7, 12x8, 13x6, 13x7

The O.S. Engine 61FX suits experienced flyers looking for a tuneable engine that balances cooling efficiency with solid mechanical design.

Is the 61FX appropriate for aerobatic sport models?

Yes, when matched with the recommended props and a suitable muffler configuration, it delivers the responsiveness required for aerobatic routines.

How should I position the remote needle valve?

Choose the easier access orientation for your cowl layout; the valve's two-position design reduces the need for cutting and keeps the model looking neat.

What maintenance keeps the engine running well?

Regular inspection, cleaning of the carburetor, and checking for play in the bearings will keep performance consistent and extend service life.

Can I fit a tuned pipe for higher top end?

Yes, the engine lists tuned pipe prop sizes that help you find the right balance between midrange torque and peak rpm.

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