Second Hand OS Engines 91SZ-H
[TB91]

Second Hand, Selling on Behalf, No Warranty, No Free Shipping. 

This motor has only had about 4 liters through it and is in near new condition.

OS91 SZH Heli Engine boasts approximately 10% more power than its predecessor. This engine has a newly designed crankcase which has high rigidity and develops stable power. By seeking the best balance at high rpm while succeeding a bore/stroke that has good results, OS 91 SZH could achieve a high stability at both hovering and air flight.

Besides OS 91 SZH PS Hyper engine is equipped with new design 60M-C Carburetor (which has three adjustable control for independent adjustment at idling, hovering and high speed) and a big blue alumite heatsink head ,which has laser marking of "laurels" motif, develops high radiation effect.

OS 91 SZH Hyper brings you even higher performance to flying in 90 class helicopter than ever before.

O.S. Max .91 SZ-H Ringed Helicopter Engine powered the 1st, 2nd and 3rd place finishers in the 2005 World Championships in Spain.

FEATURES:

• Redesigned crankcase provides better support for the crankshaft and thrust bearings
• New 60M 3-needle carburetor with mid-range needle for precise adjustments and push/pull throttle arm for added precision in power control
• Front and rear ball bearing-supported crankshaft
  

INCLUDES:

• O.S. Max .91 SZ-H Ringed Helicopter Engine
• #8 glow plug
• instruction manual
• one each 0.2mm and 0.1mm thick head gaskets

REQUIRES: Fuel: 10%-30% nitromethane with at least 18% lubricant. Lubricants may be either castor or synthetic oil or castor/synthetic blend. Field Equipment: glow starter, fuel bulb, fuel can filter, fuel pump hexagonal starting shaft (depending on brand of helicopter) electric starter, battery and fuel tubing, Muffler- This is specific to the heli.

SPECS:

Displacement: 0.912 cu in (14.95 cc)
Bore: 1.091" (27.7mm)
Stroke: 0.976" (24.8mm)
Output: 3.3 ps @ 15,000 RPM
Practical RPM Range: 2000-16,000
Weight Without Muffler: 21.3oz (605g)