About The Engine; Engine Parts Name - O.S. engine Alpha Series Owner's Instruction Manual

This is the third model from the new FS
series of the single cylinder overhead valve
four cycle engines.
It features a sharp and modern look and
broad power band to suit a variety of model
types. Newly designed F-5040 silencer
minimizes noise with its soft, low-amplitude
sound. Threaded header pipe allows
adjustments in the distance between
silencer and exhaust and exhaust angle.
New lubricating system eliminates the need
for breather tubing from the crankcase. It
has the same mounting dimensions, drive
hub position and linkage position with the
FS-91S .
Please note that this engine is not supplied
with any tools (e.g. Allen keys, wrenches, etc.)
Rocker Cover
Glow Plug TYPE F
Intake Manifold
Carburetor
Type 60Y
Cover Plate

ABOUT THE ENGINE

STANDARD ACCESSORIES
Glowplug TypeF
Needle Valve
Extension Cable Set
F-5040 Silencer Assembly
Silencer Body
Exhaust Header Pipe
(W/M12 Lock Nuts)
8

ENGINE PARTS NAME

Cylinder Head
Propeller Nut
Exhaust Header Pipe
Lock Nut
Propeller Washer
Drive Hub
Crankcase
Beam Mount
9
Exhaust Header Pipe Nuts M12
F-5040 Silencer Body