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O.S. Engines® 91HZ-PS 3D Ringed w/Pump
A .91 heli engine designed for 3D thrills!
Futaba R617FS Receiver FREE!
O.S. Engine Glow Plug Caddy with the purchase of this item from this page. A $4.99 value.
To receive your Free Item you must use the BUY NOW button on this page.
  • 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 rectangular heatsink is entirely enclosed inside the cooling shroud to lower operating temperatures.
  • The piston and crankshaft are newly designed to further reduce vibration and improve torque stability over the entire rpm range.
  • A thermo insulator on the carburetor blocks engine heat to ensure more stable fuel/air mix.
With its PD-08 fuel pump and regulator, the 91HZ-PS is the perfect power plant for 3D, delivering the consistent high-end power needed for executing extreme maneuvers.

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
91HZ-PS Competition Heli
Engine Only
       LWP217 ONLY       Buy Now Stock Status:
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Prices shown were current at time of ad production and are subject to change.
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