O.S. Engine OSMG0982 81FS-a Performance 4-Stroke with PD-08 Pump  [OSMG0982]

O.S. Engine 81FS-a 4-Stroke Pumped Engine
Price:
AUD$592.14
Brand:
O.S. Engine
Model:
OSMG0982
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Balanced Power for 3D and Sport Flying

Pilots who fly sport and 3D models will appreciate the O.S. Engine 81FS-a model OSMG0982. With the PD-08 fuel pump fitted, the engine keeps a consistent supply of fuel during demanding flight routines.

Consistent Feed Through Complex Maneuvers

The PD-08 maintains fuel flow even when the airframe is in unusual attitudes, supporting smoother throttle transitions and predictable engine behavior under load.

Integrated Recirculation to Reduce Oily Residue

The internal recirculation lubrication cuts down on oil being expelled from the crankcase, which helps keep the airframe cleaner and reduces the need for frequent detailing.

Specifications

  • Displacement: 0.809 ci (13.26 cc)
  • Bore: 1.091 in (27.7 mm)
  • Stroke: 0.866 in (22.0 mm)
  • Practical RPM: 2,200-10,000 rpm
  • Power Output: 1.28 hp @ 10,000 rpm
  • Engine Weight: 20.11 oz (570 g)
  • Muffler Weight: 1.9 oz (54 g)
  • Includes: 61R carburetor, F-5030 muffler, PD-08 pump

The O.S. Engine 81FS-a fits pilots who need a pumped 4-stroke that stays tidy and responsive in aerobatic flight.

Will the PD-08 pump affect engine run-in?

No, the pump does not change break-in requirements. Follow the standard run-in procedure and monitor temperatures and mixture during initial sessions.

Are spare parts available for the pump assembly?

Replacement parts are usually available through O.S. dealers. Keep a spare fuel line and clamp handy in case of wear or damage.

What checks should I do after installation?

Verify secure mounting, confirm carburetor linkage movement, inspect fuel routing, and do a ground run to confirm steady idling and throttle response.

Is the 61R carburetor adjustable for different altitudes?

Yes, the 61R has needle adjustments to tune mixture for varying conditions. Make small changes and verify engine behavior under load to dial settings in.

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