User manual DLE120
4
Keeping gasoline inside the carburetor over an extended period 
of time will damage the diaphragm valve and clog passages 
inside the carburetor. Because the carburetor is more complicated 
than those used in glow engines, keep the fuel clean by using a 
fuel fi lter. Use a fi lter intended to be used with gasoline engines. 
Metal fi lters intended for glow engine are too coarse and will 
not screen out fi ner particles. 
●  Always fi lter your fuel by using an appropriate fi lter before putting 
it into the airplane’s fuel tank. 
●  Gasoline is extremely fl ammable. Keep it away from an open 
fl ame, excessive heat or sources of sparks. 
●  Do not smoke near the engine or the fuel tank. 
●  This engine was designed for use in a model aircraft. Do not 
attempt to use it for any other purpose. 
●  Always install an ignition system on/off switch on the aircraft used. 
●  Caution: Running the engine with a lean fuel mixture will cause 
the engine to overheat and burn the electrode of the spark plugs. 
Pay close attention to the High-speed Needle adjustment. Running 
the engine with the proper fuel mixture will make the spark plugs 
appear yellow at the ignition point.
●  For optimum performance please use fresh or recently purchased 
87-93 octane gasoline with a 30:1 fuel/oil mixture
.
Fuel/Oil Mixing Chart
1 Gallon Gasoline (128 fl  oz/3.78L) / 2-Cycle Oil 
(4.26fl oz /125.68ml) = 30:1 ratio 
●  Excessive running of the engine at idle speed can result in 
carbonized spark plugs.
●  Keep the surface of the engine clean to ensure proper heat 
dissipation. Ensure proper cooling/ventilation around both 
cylinders with adequate air exhaust.
●  
To avoid permanent damage to the electronic ignition system, NEVER 
rotate the propeller on your DLE engine with the electronic ignition 
system switched on and the plug not installed in the plug cap.
●  If you choose to use the optional TX activated Gas Engine Kill 
Switch (DLEG9205) it is strongly recommended that you install 
the TX activated kill switch between the on/off switch and the 
ignition. The on/off switch provides an added safety feature in 
the event the TX activated kill switch does not function properly. 
This is especially important during the starting sequence as it 
requires the on/off switch to be in the ON position before ignition 
can occur.










