User manual OS ENGINES FS-120S-SP

[. . . ] engine is acquired by another person, we would respectfully request that these instructions are also passed on to its new owner. 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. 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). · A weakened or loose propeller may disintegrate or be thrown · Model engine fuel is poisonous. Do not allow it to come into contact with the eyes or mouth. [. . . ] 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. 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. 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. · · · · · 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. [. . . ] 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. [. . . ]