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About the engine, Engine parts name – O.S. Engines Sirius7 FR7-420 User Manual

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The FR7-420 (Sirius7) is a seven-cylinder radial
overhead-valve four-stroke-cycle engine of 70cc
displacement. The engine maintains the same
features of stress free starting, super smooth idling
and high torque power which is always the hallmark
of O.S. large size multi-cylinder engines. With its
finely detailed design and outstanding scale
appearance and sound, the engine's quality is
second to none.

ABOUT THE ENGINE

STANDARD ACCESSORIES

Glow Plug Type F (installed on the engine)

Valve adjusting tool kit

Feeler gauge 0.04mm

Feeler gauge 0.1mm
Hex. key 1.5mm
Wrench 5mm

Plug Cable Set

Plug Cable
Plug Terminal (7pcs.)

(7pcs.)

(w/silicone tube)

Radial Mount Retaining Screw Set
Engine mounting screws (M5X25)
Lock washers (ø5)
Blind nuts (M5)

(5pcs.)

(5pcs.)

(5pcs.)

Lead for ground 5 (1pc.)

Needle-Valve Extension Cable Set

STANDARD ACCESSORIES

Drain Plug

Carburetor Insert

Decal

Instruction Manual

Aluminum Case

7

ENGINE PARTS NAME

Lock Nut

Propeller Washer

Crankcase

Propeller Nut

No.1 Cylinder

No.2 Cylinder

No.3 Cylinder

No.4 Cylinder

Front Housing

No.5 Cylinder

No.7 Cylinder

No.6 Cylinder

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