User manual MVVS 116-BOXER IRS V1.7

[. . . ] Operating instructions MVVS 116 IRS No: 3010 Before using the engine, please read these instructions carefully. Congratulations on choosing the gas engine MVVS 116cc. MVVS 116cc has been designed and manufactured for propeller-powered radio-controlled model planes. It is able to meet all of your expectations of an acrobatic racing engine. Technical specifications Bore 42 mm Maximum power output ** Silencer INT 58. 01 +MVVS adaptor Maximum torque ** Silencer INT 58. 01 +MVVS adaptor Fuel Lubrication RpM range 14 HP / 6400 RpM 11 HP / 6000 RpM 15 N/m / 6100 RpM 12. 7 N/m / 5600 RpM Unleaded 95-octane fuel Oil with petrol in mixture 1:40 1000 ­ 7500 RpM Stroke Weight of complete engine without ignition* Weight of ignition unit 42 mm 3100 g 270 g * Some manufacturers state the weight of incomplete engines. The value in the table above stands for the weight of a complete engine, including the spark plug, carburetor, drive washer and prop screws. [. . . ] The situation is further complicated by environmental parameters (temperature and atmospheric pressure in particular): low temperature and high pressure increase propellers' input requirements by 20% in comparison with input at hot weather. Suggested propeller dimensions: two-blade: 28x10-14, 30x10-12, 32x10 three blade: 28x10 These values are only approximate and may vary with the factors described in the previous section, as well as with the type of the exhaust system used. The MVVS 116 is designed for the power maximum by 5800 ­ 6300 RpM (according the exhaust pipe used). If this maximum performance is needed, choose the suitable propeller so, the engine reach these speed on the ground (in fact slightly lower; depends on the unloading the propeller in air in accordance to reached speed while flying). We do not recommend using propellers, which allow turning the engine on the ground more as 7000 RpM. Exhaust Use only factory-made exhausts pipes designed for this type of engine. Preferably MVVS exhaust system, which also guarantees the announced power output. The manufacturer declines all responsibility for all engine damages arising from the use of improper exhaust systems. When mounting the exhaust follow the manufacturer's instructions. Make sure to secure sufficient cooling of the exhaust. Carburetor adjustment Carburetor is adjusted before you buy it. It is not usually needed to change this setting (always apply if used recommended exhaust system and propeller). All settings make only if engine does not run. Injury may be caused by propeller. Step I - Accelerate to 2/3 of the throttle range within approx. Repeat three times ­ if the engine accelerates quickly and without a hiccup go to Step III. If acceleration is not smooth go on to Step II. Step II Basic setting: adjusting needle (L) for low revolutions range: 1 turn adjusting needle (H) for high revolutions range 50 min ­ 1 turn (the values are derived from the position of clock-hands, starting position: fully closed needle) Pressure inlet Throttle lever Idle screw Choke lever - Faulty acceleration with hiccups and a tendency to cut out is usually attributable to a poor fuel mixture in the medium-revolutions range. Stop the engine and recheck the fuel feed (the hose-pipe must not be pinched or broken; if fitted, check also the fuel filter permeability). Restart the engine and test acceleration again. If problems persist adjust the carburetor. Open the adjusting needle L by 5 min and retest acceleration. If acceleration is smooth, open the needle by another 3-5 min - this should be done because the needle was previously set at a boundary value; if atmospheric conditions changed during flight, the problems might recur. - If the engine continues to malaccelerate open the needle by 10 min if the engine's operation does not improve, stop it and check the basic setting. Set the adjusting needle L at 50 min and the adjusting needle H at 1 turn . [. . . ] If it is overflowing, give the engine 1-2 turns only. 2) Switch the ignition on, open the choke valve, set the throttle at slightly higher idle speed and give the engine a few quickly turns. If even after the fourth turn, with the choke valve closed, you do not hear a suggestion of the engine starting, give the engine 2 turns following the instructions in paragraph 1 above. Then proceed according to instructions given in paragraph 2. [. . . ]