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Remember that your engine is not a " toy ", but a
highly efficient internal-combustion machine whose
power is capable of harming you, or others, if it is
misused or abused. As owner, you, alone, are
responsible for the safe operation of your engine, so
act with discretion and care at all times.
If at some future date, your O.S. engine is acquired by
another person, we would respectfully request that
these instructions are also passed on to its new
owner.
WARNINGS
These cover events which might involve serious (in
extreme circumstances, even fatal ) injury.
NOTES
These cover the many other possibilities, generally less
obvious sources of danger, but which, under certain
circumstances, may also cause damage or injury.
SAFETY INSTRUCTIONS AND
WARNINGS ABOUT YOUR
O.S. ENGINE
The advice which follows is grouped under two
headings according to the degree of damage or
danger which might arise through misuse or neglect.
WARNINGS
Never touch, or allow any object to come into
contact with, the rotating propeller and do not
crouch over the engine when it is running.
A weakened or loose propeller may disintegrate or be
thrown off and, since propeller tip speeds with powerful
engines may exceed 600 feet(180 meters) per second, it
will be understood that such a failure could result in
serious injury, (see 'NOTES' section relating to propeller
safety).
Model engine fuel is poisonous. Do not allow it
to come into contact with the eyes or mouth.
Always store it in a clearly marked container
and out of the reach of children.
Model engine fuel is also highly flammable.
Keep it away from open flame, excessive heat,
sources of sparks, or anything else which
might ignite it. Do not smoke or allow anyone
else to smoke, near to it.
Never operate your engine in an enclosed space. Model
engines, like automobile engines, exhaust deadly carbon-
monoxide. Run your engine only in an open area.
Model engines generate considerable heat.
Do not touch any part of your engine until it
has cooled. Contact with the muffler(silencer),
cylinder head or exhaust header pipe, in
particular, may result in a serious burn.
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NOTES
This engine was designed for model aircraft. Do not attempt to use it for any other purpose.
Mount the engine in your model securely, following the manufacturers' recommendations, using appropriate screws and
locknuts.
Be sure to use the silencer (muffler) supplied with the engine. Frequent exposure to an open exhaust may eventually impair
your hearing.
Such noise is also likely to cause annoyance to others over a wide area.
Fit a top-quality propeller of the diameter and pitch specified for the engine and aircraft. Locate the propeller on the shaft
so that the curved face of the blades faces forward-i.e. in the direction of flight. Firmly tighten the propeller nut, using the
correct size wrench.
Always check the tightness of the propeller nut and retighten it, if necessary, before restarting the engine, particularly in
the case of four-stroke-cycle engines. A safety locknut assembly is provided. Always use it. This will prevent the propeller
from flying off in the event of a "backfire", even if it loosens.
If you install a spinner, make sure that it is a precision made product and that the slots for the propeller blades do not cut
into the blade roots and weaken them.
Discard any propeller which has become split, cracked, nicked or otherwise rendered unsafe. Never attempt to repair such
a propeller: destroy it. Do not modify a propeller in any way, unless you are highly experienced in tuning propellers for
specialized competition work such as pylon-racing.
Use an electric starter for this engine. The wearing of safety glasses is also strongly recommended.
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NOTES
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 carburettor.
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!
