O.S. Engines FR5-300 - Manual (Page 3)

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Take care that the glow plug clip or battery leads do not come into contact with the propeller.
Also check the linkage to the throttle arm. A disconnected linkage could also foul the propeller.
After starting the engine, carry out any needle-valve readjustments from a safe position behind the rotating
propeller. Stop the engine before attempting to make other adjustments to the carburetor.
Adjust the throttle linkage so that the engine stops when the throttle stick and trim lever on the transmitter are fully
retarded. Alternatively, the engine may be stopped by cutting off the fuel supply. Never try to stop the engine
physically.
Take care that loose clothing (ties, shirt sleeves, scarves, etc.) do not come into contact with the propeller.
Do not carry loose objects (such as pencils, screwdrivers, etc.) in a shirt pocket from where they could fall through
the propeller arc.
Do not start your engine in an area containing loose gravel or sand. The propeller may throw such material in your
face and eyes and cause injury.
For their safety, keep all onlookers (especially small children) well back (at least 20 feet or 6 meters) when preparing
your model for flight. If you have to carry the model to the take-off point with the engine running, be especially
cautious. Keep the propeller pointed away from you and walk well clear of spectators.
Warning! Immediately after a glowplug-ignition engine has been run and is still warm, conditions sometimes exist
whereby it is just possible for the engine to abruptly restart if the propeller is casually flipped over compression
WITHOUT the glowplug battery being reconnected. Remember this if you wish to avoid the risk of a painfully rapped
knuckle!
Use an electric starter for this engine. The wearing of safety glasses is also strongly recommended.
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The O.S. Sirius (FR5-300) is a five-cylinder radial
overhead-valve four-stroke engine of 49.75cc
(3.04cu.in) total displacement. The FR5-300 has been
designed to meet the requirements of those whose
interests lie in the field of very large radio-controlled
aircraft and who demand the high standards of
refinement that are not available in large
displacement two-stroke engines based on chainsaw
and other light commercial power units.
TOOLS AND ACCESSORIES
INTRODUCTION
Please ignore the listing of the original instructions manual.
The following tools and accessories are supplied with your
engine.
Description No.
Radial Motor Mount Set
Radial Motor Mount(installed on the engine)
Mount attachment screws
Engine mounting screws (M5X25)
Lock washers (ø5)
Blind nuts (M5)
Set of leads for wiring glow plugs
Leads for glow plug with clip
Lead for earth (ground)
Woodruff key
Valve adjusting tool kit
Choke valve rod
Drain plug
Display Stand
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