User manual MVVS 80 IRS SP V1.2

[. . . ] Before starting the engine always make sure that the model is safely fixed in place and cannot start moving. Fuel is combustible and therefore must be kept in an enclosed container at a safe distance from the engine when it is running. When preparing fuel carefully follow the manufacturer's or dealer's instructions. [. . . ] When mounting the engine in the model use seals to protect all openings and prevent the pollution of the engine's inside with sawdust, residual abrasives etc. 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. MVVS 80 has been designed to generate maximum power at 6000 ­ 6500 RpM, according to the type of exhaust used. 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 the unloading of the propeller depending on the speed of flight) on the ground. We do not recommend using propellers with which the engine reaches more than 7000 RpM on the ground. Exhaust 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 secure sufficient cooling of the exhaust. Carburetor adjustment Basic setting: adjusting needle (L) for low revolutions range 1 turn and 45 min adjusting needle (H) for high revolutions range 1 turn and 10 min (the values are derived from the position of clock-hands; the starting point is needle fully screwed in) The new engine comes adjusted to the basic setting. This setting should be kept during running the engine in! Air pressure inlet 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 a hiccup go to Step III. Step II Adjusting needle (H) Adjusting needle (L) 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). 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's operation does not improve afterwards, stop it and check the basic setting. Set the adjusting needle L at 1 turn and 50 min and the adjusting needle H at 1 turn and 10 min. If engine does not accelerate properly, open the needle by another 10 min. If it does not accelerate, the defect supposed to be elsewhere than in incorrect adjustment. Step III If the engine accelerates correctly, according to the above test, set it at idle speed and accelerate to full speed. [. . . ] After each 40 hours of operation time preventively exchange the read valve for new and check the crankshaft bearings, connecting rod, check how much is used the piston and piston ring. 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. [. . . ]