User manual MVVS 40 IFS V1.1

[. . . ] If you use a spinner, check that it is tightened up, too. When mounting the spinner always follow the assembly instructions. Before each flight check that all the propeller screws are tightened up and in good condition. If you use a spinner, check that it is tightened up, too. [. . . ] If necessary, quality brand-name synthetic oil intended for racing two-stroke engines can be used too. Never use inexpensive oil developed for garden appliances or synthetic oils intended for the operation of methanol model engines. The manufacturer declines all responsibility for all engine damages arising from the use of low-quality fuel. Store fuel in containers designed for this purpose. Do not use mixed fuel older than 90 days. Choke H needle adjusting screw L needle adjusting screw Lever - throttle Assembly 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. Gas engines heat up to a much greater degree than methanol ones!Do not forget that the engine needs oxygen from the air to be able to operate. Therefore ensure access of air to the engine intake as well. Caution: intake of warm air from beneath the cowl may cut the engine power output. 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. Pressure pulse inlet The new engine comes adjusted to the basic setting. 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 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 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 not accelerate properly open the low speed needle by 10 minutes. [. . . ] Having started the engine, leave it running for about 5 minutes at a higher idle speed. Then run it in for about 10 min, while changing revolutions from idle to 1/2-3/4 of the range and shortly holding each position - gradually prolong the holding periods. After 10 minutes of operation, open the throttle at maximum for a period of about one minute. At this point stop the engine and let it cool down. [. . . ]