DLE 20 User Manual
DLE
-
20
Operator’s Manual
Specifications
Displacement:
Performance:
Idle Speed:
Ignition Style:
Recommended Propellers:
Spark Plug Type:
Diameter × Stroke:
Compression Ratio:
Carburetor:
Weight:
™
© 2011 Hobbico®, Inc. DLEG0020 Mnl 1.1
20cc [1.2 cu. in.]
2.5 HP / 9,000 rpm
1,70 0 rp m
Electronic Ignition
14u10, 15u8, 16u6, 16u8, 17u6
CM6
(Gap) 0.018in.– 0.020 in. [0.45mm –0.51mm]
1.26 in. [ 32 mm] u0.98 in. [ 25mm]
10.5 :1
DLE MP 148 100424 with Manual Choke
Main Engine − 1.43 lb [650 g ]
Muffler − 1.76oz [50 g]
Electronic Ignition − 4.23oz [120 g]
87− 93 Octane Gasoline with a 30:1
Fuel:
gas/2-stroke (2-cycle) oil mixture
Parts List
(1) DLE-20cc Gas Engine w/DLE MP 148 100424
(1) DLE Spark Plug (NGK CM6 size) with additional spring
(1) Muffl er with gasket
(2) 4 x 14 mm SHCS (muffl er mounting)
(1) Electronic Ignition Module with additional tachometer lead
(1) Silicone Pick-up Wire Cover / Ignition Wire Cover
(1) Red Three Pin Connector Lead with Pig Tail (ignition switch)
(1) Long Throttle Arm Extension with installation screw and nut
(2) Three Pin Connector Securing Clips
(1) DLE Decal (not pictured)
Safety Tips and Warnings
●
This engine is not a toy. Please place your safety and the safety
of others paramount while operating. DLE will not be held
responsible for any safety issues or accidents involving this engine.
●
Operate the engine in a properly ventilated area.
●
Before starting the engine, please make sure all components
including the propeller and the engine mount are secure and
tight. It is strongly recommended that a screw sealant is used
(Great Planes® Threadlocker GPMR6060) during engine installation.
●
During the break-in period, it is recommended that the engine be
installed on the aircraft or a test stand with an appropriate shock
absorber. Otherwise it is probable that vibration could rebound
back to the engine and serious damages may occur during the
break-in period.
2
●
For your safety and the safety of others, please do not stand in
front or in line with the propeller when the engine is running. Keep
onlookers away from the running engine, especially small children.
●
Always use a balanced spinner and a balanced propeller. An
unbalanced spinner and propeller combination will cause high
levels of vibration and may cause the propeller shaft to break.
Always use a lightweight spinner on your engine. Lightweight
spinners are considered to be those with a cone wall of 1mm
or less. Heavy spinners could cause the propeller shaft to break.
Securely tighten the spinner and propeller on the engine to prevent
it from being thrown off the engine while running.
●
Never use a propeller that has hit the ground. Even though it
may look good from the outside, it may be cracked on the inside
which may cause it to disintegrate while in use. Do not use a
nicked, cracked or split propeller.
●
Keep foreign objects away from the propeller. Make sure that
nothing can be “sucked in” by the propeller.
●
Never start the engine on loose gravel or sand.
●
Do not attempt to stop the engine by throwing anything into the
path of the propeller.
●
Make sure the fuel line is well-secured to the engine and to the
fuel tank so that it won’t come off in fl ight.
●
Do not use silicone fuel line because it will be dissolved by the
fuel. Use gasoline approved vinyl or neoprene rubber fuel line.
Always secure the fuel line away from the cylinder. The engine’s
heat can damage the fuel line.
●
Never touch the engine immediately after a run. The engine will
be hot.
●
Before transporting your model, remove all the fuel from the
fuel tank and fuel lines.
●
Always use high-quality oil intended for 2-stroke (2-cycle) engines.
It’s a good idea to use a petroleum based 2-cycle motor oil like
Lawn Boy All Season – Ashless, Generation II oil for the breakin period. Break-in should be considered about the fi rst 3-5
gallons you run the engine. A high quality synthetic 2-cycle oil is
recommended for optimum performance and a longer engine life.
Synthetic 2-cycle oils leave fewer combustion byproducts than
natural oil which can foul the engine and exhaust ports, resulting
in reduced performance. Synthetic oils also reduce friction and
provide more fl uidity at low temperatures.
●
Do not install your throttle servo or kill switch servo inside the
3
engine compartment. Doing so could cause radio interference.
Install all electronic radio devices as far away from the engine
as possible.
●
The throttle and choke pushrods should be non-metallic.
●
If the engine is not to be used for more than a month, drain the
fuel tank and remove any fuel from inside the carburetor. Do this
by running the engine at idle until it quits by running out of fuel.
Keeping gasoline inside the carburetor over an extended period of
time will damage the diaphragm valve and clog passages inside
the carburetor. Due to the carburetor being 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 kill switch on the aircraft used.
●
Caution: Running the engine with a lean gas mixture will cause
the engine to overheat and burn the electrode of the spark plug.
Pay close attention to the High-speed Needle adjustment. Running
the engine with the proper gas mixture will cause the spark plugs
to appear yellow at the ignition point.
●
For optimum performance please use fresh or recently purchased
93 octane gasoline (87 octane gasoline will suffi ce) with a 30:1
gas/oil mixture.
GAS/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 a
seriously carbonized spark plug.
●
Keep the surface of the engine clean to ensure proper heat
dissipation. Ensure proper cooling/ventilation around the cylinder
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.
4
Installation Instructions
Prepare the engine for installation
Before beginning installation it’s a good idea to plan location of the
various components of the engine. Many of the following steps may
need to be completed in a different order than listed.
1. Check to see that all screws and bolts are tight. Check carefully
for any cracks, broken, or missing parts. Tighten or replace any
damaged or missing parts before proceeding.
2. Install the silicone wire cover over the pick up lead coming from
the engine (cut the excess silicon wire cover) and connect the lead
to the pick–up lead from the Electronic Ignition Module. Secure
the connection with the included three pin connector securing clip.
5
3. Connect the kill switch lead to the red connector from the ignition
control module using the lead from the kill switch or with the included
three pin connector with pig tail. Use one of the included three pin
securing clips to secure the connection.
4. Connect the ignition module battery to the kill switch. Any 4.8-
6.0V, 1000mAh and above capacity battery will work well for this.
Use heat shrink tubing to secure this connection.
5. Install the ignition kill switch and charge jack on the aircraft so
that it is easily accessible from the outside of the plane.
6. Install the ignition module securely in the airplane forward area. It
is recommended that a thin piece of foam rubber is placed between
the module and the mounting surface and that Velcro® is used to
hold the module in place.
6
7. Secure all connections with heat shrink tubing (not supplied).
8. Install the silicone
ignition wire cover over
the ignition wire.
9. Install the spark plug
into the engine head (7-8
lbs torque).
Switch
(Not included)
Ignition Control Switch Wire
(To On/Off Switch)
ELECTRONIC IGNITION
SYSTEM
Charge
Lead
Battery
Lead
Ignition Wire
(To Spark Plug)
Pick-Up
Sensor Wire
(To Sensor On Engine)
Tachometer
Lead/
RPM
Signal
Out-Put
Installing the DLE-20 on Your Airplane
Note: The DLE-20 must be installed on at least a 6mm [1/4”] fi rewall.
The fi rewall must be securely glued to the airplane. Use triangle
stock and pin the fi rewall with hardwood dowels to reinforce the
fi rewall glue joints. Never install the DLE-20 onto a fi rewall thinner
than specifi ed because it may fail due to the power of the engine.
1. Select an engine mount. A two-piece engine mount that does not
interconnect or overlap at the fi rewall is preferred for the DLE-20, like
the Dubro Vibration Reducing Engine Mount 1.20-1.80 (DUBG1307).
2. Before securing the engine mount to the fi rewall, test fi t the engine
onto the mount and place the mount onto the fi rewall. Use this
positioning to create an engine mounting template. Use the template
to drill the mounting holes in the locations on the fi rewall. Note: A
Template for mounting the DUBG1307 is provided on the back of
this manual. Press the blind nuts into the rear of the fi rewall. If you
choose to use regular nuts or lock nuts be sure to place washers
7
Optional
Tachometer
(Not included)
on the bolts before securing the nuts onto the bolts on the rear of
the fi rewall. Be sure to use Threadlocker on the screws holding the
engine mount to the fi rewall.
3. Place the engine on the engine mount and at the recommended
distance from the fi rewall and test-fi t the cowling on the aircraft to
verify the distance. When you’re satisfi ed with the engine’s position,
mark the location of the four holes on the mount.
4. Remove the engine from the mount. Drill and tap the engine mount
at the position of the four mounting holes. Use an appropriate size
screw (we used (2)1-1/4” and (2) 1” 8-32 thread SHCS). It’s a good
idea to drill and tap all the way through the mounting beams in
order to secure each screw with a lock nut.
5. Secure the four screws with lock washers, fl at washers, and lock nuts.
Drain/Vent Pressure Relief Line
Route to top-front of fuel tank interior,
to prevent siphoning.
Fuel Tank
Supply Line
to Carburetor
Clunk Lines
Carb
Fuel fill line
Plug
This line must be extended
to exit the bottom of the aircraft.
6. Install the fuel tank in the airframe. Use only gasoline-safe fuel lines
and a gasoline safe stopper. One line should go to the carburetor and
the other is to be used as a vent (a vent line is simply an open ended
fuel line from the fuel tank which exits the engine compartment or
the fuselage; most vent lines exit at the bottom of the fi rewall).You
can fi ll the tank by using the carburetor line as fi ll line if you have
access to it or install a third line to be used as fi ll line. Installing a
third line is the cleanest and easiest way to add fuel. An alternative
fueling set up is a 2-line system with a T-fi tting approved for gasoline
use. Be sure to use a fi ller plug with either a 2 line or 3 line set-up.
It is a good idea to add an extension to the vent line as shown, that
goes up and to the rear of the tank. This helps to avoid draining fuel
from the tank when the model is pointed down.
8
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