Evolution Engines EVOE116GX2 - Manual (Page 6)

3) If the engine does not start, leave the throttle at the high idle position, turn the ignition off, then on and close the choke valve. Start
the engine with the throttle at the fast idle position and the choke valve closed. The engine should fire and quit. If it does, repeat step
2 above.
4) At this point, if the engine still will not start, unscrew the spark plugs and check the contacts. Clean any possible excess fuel (i.e.
an indication of engine flooding) and screw them in again. Further starting should only be done with the throttle at idle position and
the choke in the open position. If the plug is dry, then probably not enough fuel has been drawn into the carburetor. If that is the case,
check for proper fuel feed and then return to the instructions given in paragraph 1.
5
Starting the engine (continued)
Having started the engine, leave it running for about 5 minutes at a higher idle speed. Then run it for about 20 minutes, 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 to maximum for a period of about one minute. At this point, stop the engine and let it cool
down. Then restart it and check the adjustment. If everything is all right, you can make your first flight. During the first few flights. do
not overload the engine and do not let it run at high revolutions for long periods of time (very important during hot weather). Use up all
the fuel that was mixed with the oil that is included with your engine. From then on, fuel and oil should be mixed in the proportion 40:1
First, start and warm the engine for 30 to 45 seconds before attempting to adjust the carburetor. In order to confirm that your engine is
properly adjusted you should follow the procedure below.
1) Move the throttle from idle to 2/3 of the full throttle position quickly (fast acceleration). Then repeat three times – if the engine
accelerates smoothly go to step 3 below. If acceleration is not smooth, go on to step 2.
2) Faulty acceleration and a tendency to quit is usually attributable to a poor fuel mixture in the medium rpm range. Stop the engine
and recheck the fuel feed (the fuel line must not be pinched or broken). Restart the engine and test acceleration again. If the problem
persists, adjust the carburetor. Open the low speed needle by 1/8 turn and retest. If acceleration is smooth, open the needle by another
1/8 turn—this should be done because the needle was previously set too lean; if atmospheric conditions have changed recently you
may have to readjust the needle. If the engine continues to not accelerate properly, open the low speed needle by 10 minutes. If the
engine’s operation does not improve, shut it off and check the basic setting, restart the engine and test the acceleration. If the engine
runs correctly, go to step 3. If it continues to not accelerate properly, open the low speed needle by another 10 minutes. If acceleration is
faulty, the defect is likely to lie somewhere other than an incorrect adjustment.
3) If the engine accelerates correctly, according to the above test, set it at idle speed and accelerate to full speed. Repeat twice more. If
the engine functions correctly, go to step 4. If it cuts out, open the low speed needle by another 1/8 turn more.
4) If the engine reacts correctly set it at full speed. If revolutions do not drop, the engine has been adjusted successfully. If revolutions
seem to drop, open the high-speed needle by approximately 5 to 10 minutes.
caution! The engine must be stopped while you adjust the carburetor in order to prevent injury by the propeller.
carburetor Adjustment
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