User manual MVVS 50 IRS V1.3

[. . . ] Always stop the engine either by turning off the ignition switch or by completely closing the carburetor throttle valve. Before starting the engine always make sure that the model is safely fixed in place and cannot start moving. 7) 8) 9) 10) 11) 12) Version 1. 3 13) 14) Fuel is combustible and therefore must be kept in an enclosed container at a safe distance from the engine when it is running. 15) When preparing fuel carefully follow the manufacturer's or dealer's instructions. 16) Small objects must be kept at a safe distance from the engine when it is running. [. . . ] If you wish to utilize the maximum power output, choose a propeller, which allow the engine to reach these revolutions, or slightly lower revolutions (given that the unloading of the propeller depends on the speed of flight) on the ground. We do not recommend using propellers with which the engine reaches more than 7500 RpM on the ground. When fixing the propeller to the engine tighten the central nut and each screw several times over. Finally tighten the washer screws once again in sequence across each other. Exhaust System Use only factory-made exhausts pipes designed for this type of engine, preferably brand-name MVVS engines with which you also get the power output guaranteed. 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 ensure sufficient cooling of the exhaust. Carburetor Adjustment Basic setting: (The values are derived from the position of clock-hands) adjusting needle (L) for low revolutions range 2 turns and 0 min adjusting needle (H) for high revolutions range 1 turn and 30 min Caution!Never over-tighten adjusting needles by force, because it can cause damage to the needles and carburetor. Carburetors worn like this can not be adjusted and will need to be changed for a new one. After the engine has been run in, adjust it following the instructions below: - start the engine and warm it up - let the engine run at idle speed for approx. 5 seconds If the engine starts to run backwards do not open the throttle - stop the engine immediately!Repeat three times ­ if the engine accelerates quickly and without hesitation, go to Step III. Step II Adjusting needle (L) Adjusting needle (H) Throttle lever Throttle stop screw Faulty acceleration with hesitation 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). 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 still has bad acceleration, open the needle by 10 min (60 degree). If the engine's operation does not improve afterwards, stop it and check the basic setting. Set the adjusting needle L at 2 turns and the adjusting needle H at 1 turn and 30 min. If engine does not accelerate properly, open the needle by another 10 min. If it does not accelerate, the problem is likely to be caused something other than an incorrect adjustment. [. . . ] After each 50 hours of operation time preventively check the con-rod and the reed valve. After 300 hours of operation time send the engine to the professional service department for a check-up. After each 3 running hours or every 15th flight do lubricate the front bearing. Lubrication the engine´s front bearing: Inject 1. 5ml of oil for engines to the hole as in the picture. [. . . ]