User manual OS ENGINES FF-320

[. . . ] PARTS & ACCESSORIES ENGINE THREE VIEW DRAWINGS MEMO 1 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O. S. ENGINE Remember that your engine is not a "toy", but a highly efficient internalcombustion machine whose power is capable of harming you, or others, if it is misused. As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion and care at all times. engine is acquired by another person, we would respectfully request that these instructions are also passed on to its new owner. [. . . ] Some nylon propellers are not strong enough to withstand the high power output of these engines and a thrown blade can be very dangerous. 14 Sport 50SX 40FX 116~10, 126 106, 10. 56, 116~7 10. 56, 116~8, 126~7 126~8, 136~7 147 (3-blade) Aerobatic 127~9 MIXTURE CONTROLS Two mixture controls are provided on these engines. · The Needle Valve (at rear of engine) When set to produce maximum power at full throttle, this establishes the basic fuel/air mixture strength. The correct mixture is then maintained by the carburetor's built-in automatic mixture control system to cover the engine's requirements at reduced throttle settings. · The Mixture Control Valve (carburetor) This meters fuel flow at part-throttle and idling speeds to ensure reliable operation as the throttle is opened and closed. The Mixture Control Valve is factory set for the approximate best result. First run the engine as received and readjust the Mixture Control Screw only if necessary. 46FX 61FX 118~10, 127~9 (tuned silencer used) 129~11 (tuned silencer used) 91FXRING 158, 166~8, 176 Reminder! 1311~13, 1410~11 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. Type of Carburetor 50SX 40 46FX ¡ 61FX 40B 91FX 60C 60F 15 BEFORE STARTING Tools, accessories, etc. The following items are necessary for operating the engine. 1 Fuel Model glowplug engine fuel of good quality, preferably containing a small percentage of nitromethane. 3 Propeller Suggested size is 10x6(40FX), 11X6 (46FX), 12X6 (50SX, 61FX), or 15x8(91FX) . 4 Glowplug battery The power source for heating the glowplug may be either a large heavy-duty 1. 5volt dry cell, or preferably, a 2-volt rechargeable lead-acid cell (accumulator). If a 2-volt cell is employed, use a resistance wire, as shown, to reduce applied voltage, otherwise element will overheat and burn out. 1. 5 volt heavy-duty or 2 volt rechargeable dry battery lead-acid cell (at least 5Ah) Warning (Very hot) Never touch the nichrome wire while the battery is connected. Resistance coil (nichrome wire) to ge ss. e olta er v ightn Low uce br red e Raisage to volt ease . at full-throttle and with the needle-valve closed to its optimum setting) the engine must be adequately run-in, otherwise there is a danger of it becoming overheated and damaged. 5. one-quarter. (This is to avoid unnecessarily high r. p. m. when the engine starts. ) Fully closed position 1 4 Fully opened position 3 4 Set at this point 18 RUNNING-IN ("Breaking-in") All internal-combustion engines benefit from extra care when they are run for the first few timesknown as running-in or breaking-in. This allows the working parts to mate together under load at operating temperature. Therefore, it is vitally important to complete the break-in before allowing the engine to run continuously at high speed and before finalizing carburetor adjustments. engines are produced with the aid of the finest modern precision machinery and from the best and most suitable materials, only a short and simple running-in procedure is called for and can be carried out with the engine installed in the model. Install the engine with the propeller intended for your model. Open the needle-valve to the advised starting setting and start the engine. If the engine stops when the glow plug battery disconnected, open the needle-valve to the point where the engine does not stop. Run the engine for one minute with the throttle fully open, but with the needlevalve adjusted for rich, slow "four-cycle"operation. Now close the needle-valve until the engine speeds up to "two-cycle"operation and allow it to run for about 10 seconds, then reopen the needlevalve to bring the engine back to "fourcycle"operation and run it for another 10 seconds. Repeat this procedure until the fuel tank is empty. [. . . ] Repeat this procedure until the engine fails to fire. Remove the glowplug and eject any residue by rotating the engine with an electric starter for 4 to 5 seconds while the engine is still warm. Finally, inject some after-run oil into the engine. Rotate the engine a few times by hand, to make sure that it is free, and then with an electric starter for 4 to 5 seconds to distribute the oil to all the working parts. [. . . ]