User manual MVVS 45 V1.0 ASSEMBLY EXHAUSTS 3212I

[. . . ] Never throw any objects towards the spinning propeller. 7) 8) 9) 10) 11) 12) 13) 14) Version 1. 2 15) 16) 17) Be careful in choosing the location where you wish to start the engine. 19) When starting the engine make sure that bystanders, especially children, are at a safe distance of at least 10 m. Start using the MVVS 80 in model planes only after you have mastered operating smaller models. Fuel Strictly use unleaded 95-octane petrol mixed in the proportion 40 volume units of petrol to 1 unit of Mobil Racing 2T oil. If necessary, quality brand-name synthetic oil intended for racing two-stroke engines can be used too. [. . . ] 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: three-blade: 25x10-14, 26x10-14, 27x10-12 24x10-12, 25x10-12 Assembly The engine is fastened in place with four holders built in the rear cover. The rear cover is adjustable by 90° which ensure easy access to the carburetor's operating elements. The engine can be mounted directly to the firewall or an assembly kit can be used (special accessories). Use M6 screws or screws M4 with a reduction kit (special accessories). If you decide to fasten the engine using flexible motor mounts, always choose parts with enough solidity and strength. Make sure to secure the screws against loosening and regularly check that they are tightened up and in good condition. Since air is used to cool the engine, sufficient air circulation under the cowl must be ensured. Never forget about a hot air outlet ­ which must be bigger than the intake. Do not forget that the engine needs oxygen from the air to be able to operate. Caution: intake of warm air from beneath the cowl may cut the engine power output. The engine must be stopped while you adjust the carburetor in order to prevent injury by the propeller. The choke valve is set to allow minimum air flow only when fully closed, which could cause damage to the intake reed valve. Caution!In this way damaged parts cause the carburetor is not possible to adjust and it is necessary to exchange new carburetor. Depending on the throttle control used there is a possibility to use throttle stop-screw. Starting and running in a new engine Before you first start the engine, screw the plug in and tighten it up. Make sure that the plug socket is fitted in place and fastened down properly; pull the wire ring over the hexagon. Fix the ignition sensor in proper position above the magnet with screws enclosed. Unless the spark plug is not inserted in plug socket, never turn the engine with ignition turned on. 1) Make sure that the ignition is switched off, the choke valve is closed and the throttle valve is about half opened. Then give the engine 3-4 turns, provided that carburetor is not overflowing. If it is overflowing, only give the engine 1-2 turns. Throttle stop screw Throttle lever spring If the throttle pull rod is not equipped with flexible element it is recommended NOT to put off the throttle valve spring. Otherwise the vibrations of the engine can cause excessive wear of the throttle valve shafting and with this deteriorate the carburetor function. Adjusting carburetor position You can turn the rear cover by 90° which makes it possible to adjust the carburetor's position (especially its adjusting needles) when fixing it in the model. How to dismantle the rear cover: Unscrew two M5 screws that hold the carburetor in place, remove the pressure hose from the carburetor (mind the gasket under the carburetor), remove the carburetor and loosen four M5 screws along the crankcase (Caution! [. . . ] 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. 3) If the engine does not start even after another set of turns open the throttle to maximum and give the engine approx. Switch the ignition off and on again and restart the engine with throttle turned slightly down and the choke valve set open. 4) If the engine still would not start, unscrew the plug and check its contacts. [. . . ]