O.S. .91HZ F3C Competition Helicopter Engine.

FEATURES: Designed specifically for F3C aerobatic competition                  
         Rectangular heat sink allows engine to be enclosed entirely inside  
           cooling shroud                                                    
         61-E carburetor with thermal insulator to block heat and a needle    
           valve control lever to control mixture from transmitter, carburetor
           has three adjustment controls that enable independent adjustment at
           idling, hovering and high speed                                    
         Five holes in the top of the piston route gases to the piston ring  
           from within to form a tighter seal with minimum blow by            
         Ball bearing supported crankshaft                                    
         Heat sink type backplate                                            
         Two year limited warranty through Hobby Services beginning at date of
           purchase                                                          
                                                                             
INCLUDES: O.S. .91 HZ F3C Competition Helicopter Engine with #8 glow plug,    
           needle control lever, extra 0.2mm head gasket, cap screws and      
           instruction manual