FR7-420 Sirius-7 7-Cylinder

Product Number:
CAD $4,766.99
Quantity in stock: 0

This is the O.S. Sirius7 FR7-420 7-Cylinder 4-Stroke Engine.          


FEATURES: Main internal parts such as the crankshaft, cam holder and reduction 

            gear are all plated to resist corrosion                            

          V-shaped individual valve covers for vintage scale appearance        

          Impeller system distributes air-fuel mixture equally to each cylinder

            ensuring high performance and smooth idle                          

          Padded and lockable aluminum silver colored storage case             

          Two year limited warranty through Hobby Services beginning at date of



INCLUDES: O.S. Sirius7 FR7-420 7-Cylinder Sirius 4-Stroke Engine, seven type F 

            glow plugs, valve adjusting kit, radial mount & hardware kit,      

            needle valve extension cable, drain plug, carburetor insert, decal,

            glow plug cable set, instruction manual and aluminum case          


REQUIRES: Fuel: Aircraft blend 5-10% nitro content with 8-10% lubricant        

            content (it is suggested to dilute commercially available 15%      

            nitromethane and 18% lubricant fuel with methanol half and half to 

            make a 7.5% nitro and 9% lubricant fuel)                           

          Propeller: 22x10-12, 23x8-12, 24x8-12, 26x8                          


SPECS:    Displacement: 0.6071cu in x 7 (9.95cc x 7)                           

          Bore: 0.944" (24.0mm)                                                

          Stroke: 0.866" (22.0mm)                                              

          Practical RPM: 1,500 - 7,000                                         

          Weight: 111.7 oz (3,167g)                                            

          Crankshaft Size: UNF3/8-24                                           

          Distance from Backplate to Drive Washer: 6.2" (158.5mm)              

          Outer Edge of Backplate to Pushrod Covers: 4.8" (122mm)              

          Outer Diameter: 9" (230mm)                                           

          Carburetor Settings:                                                 

            Needle valve, 2-1/2 turns open from closed position                

            Throttle Valve, approximately 1/4 turn open from closed position,  

            then start engine and follow break-in instructions on pages 19-25  

            in manual

More Information
Numéro distributeur OSM37010
Country Japan
Brand O.S. Engine
Engines - Fuels - Accessories Glow Engines
Engine Class Selection Radial 7 cylinders
Giftcards Type N/A