With its PD-08 fuel pump and regulator, the O.S. Engines 91HZ-PS is the perfect power plant for 3D, delivering the consistent high-end power needed for executing extreme maneuvers! A non-pumped version designed for precision F3C competition is also available.

  • The 91HZ-PS’s pump works with a matched 61B-P carburetor and integral regulator to deliver steady fuel supply to the engine at any attitude, even during the most severe 3D maneuvers.
  • The piston and crankshaft are newly designed to further reduce vibration and improve torque stability over the entire rpm range.
  • The rectangular heatsink is entirely enclosed inside the cooling shroud to lower operating temperatures.
  • A thermo insulator on the carburetor blocks engine heat to ensure more stable fuel/air mix.

SPECIFICATIONS
Displacement: 0.91 cu in (14.95 cc)
Bore: 1.09 in (27.7 mm)
Stroke: 0.98 in (24.8 mm)
Practical RPM: 2,000-16,000
Power Output: 3.4 hp @ 15,000 rpm
Weight: 1.4 lb (635 g)
Includes: #8 glow plug, PD-08 fuel pump, 61B-P carburetor

                                               Retail
OSMG1976 91HZ-PS 3D Competition Heli Engine   $749.99
OSMG1975 91HZ F3C Competition Heli Engine      649.99

Visit the O.S. Engines website at www.osengines.com

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