DLE 30 User Manual

DLE

-

30

Operator’s Manual

Specifications

Displacement:

Performance:

Idle Speed:

Ignition Style:

Recommended Propellers:

Spark Plug Type:

Diameter × Stroke:

Compression Ratio:

Carburetor:

Weight:

™

1

© 2010 Hobbico®, Inc. DLEG0030 Mnl

30.5 cc [1.86 cu. in.]

3.7HP / 8,50 0 rpm
1,6 00 rpm
Electronic Ignition
18u8, 18u10, 19u8, 20u8
CM6
(Gap) 0.018in.– 0.020 in. [0.45mm – 0.51mm]

1.41in. [36mm] u1.18 in. [ 30 mm ]

7. 6 : 1
DLE with Manual Choke
Main Engine − 2 lb [910g ]
Muffler − 2.11oz [60 g]
Electronic Ignition − 4.23oz [120 g]
Engine Mount Standoffs − 0.71oz [20 g]
87− 93 Octane Gasoline with a 30:1

Fuel:

gas/2-stroke (2-cycle) oil mixture

Parts List

(1) DLE-30cc Gas Engine with DLE carburetor
(1) CM6 Spark plug with spare ignition wire spring
(1) Muffl er w/gasket
(2) 5x20mm SHCS (muffl er mounting)
(1) Electronic Ignition Module w/ additional tachometer lead
(4) 30mm Engine Mounting Standoffs
(4) 4x30mm SHCS with 4mm lock washers & fl at washers (propeller mounting)
(4) 5x25mm SHCS with 5mm fl at washers (mounting engine to standoffs)
(1) Silicone Pick-up Wire Cover / Ignition Wire Cover
(1) Red Three Pin Connector Lead w/ Pig Tail (ignition switch)
(1) Long Heavy Duty Throttle Control Arm
(2) Three Pin Connector Securing Clips
(1) DLE Decal Set

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

2

absorber. Otherwise it is probable that vibration could rebound

back to the engine and serious damages may occur during the
break-in period.

●

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 them 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 rubber fuel line. Always secure the
fuel line away from the cylinder head. 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 break-in
period. Break-in should be considered about the fi rst 3-5 gallons
you run in 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 better reduce friction
and provide more fl uidity at low temperatures.

3

●

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.

●

Do not install your throttle servo or kill switch servo inside the
engine compartment. Doing so could cause radio interference.
Install all electronic radio devices at least 12” [305mm] away
from the engine.

●

Caution: Running the engine with a lean gas mixing 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 mixing 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

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plug cap.

Installation Instructions

Prepare the engine for installation

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.

3. Connect the kill switch lead to the red connector from the ignition

5

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 on the aircraft so that it is easily
accessible through the cowling or the fuselage.

6. Install the ignition module
and battery 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.

7. Secure all connections
with heat shrink tubing. (not
supplied)

8. Install the silicone ignition
wire cover over the ignition
wire to the spark plug.

9. Install the spark plug into
the engine cylinder (7-8lbs

Torque).

Switch

(Not included)

Charge

Lead

Battery

Lead

Ignition Control Switch Wire

(To On/Off Switch)

ELECTRONIC IGNITION

SYSTEM

Ignition Wire

(To Spark Plug)

Pick-Up

Sensor Wire

(To Sensor On Engine)

Tachometer

Lead/

RPM

Signal

Out-Put

Optional

Tachometer

(Not included)

6

Installing the DLE-30 on Your Airplane

Note: The DLE-30 must be installed on at least a 3/8” [9.5mm] 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-30 onto a fi rewall thinner

than specifi ed because it may fail due to the power of the engine.

Note: The length of the engine from the back on the engine mount
to the face of the propeller washer is 6.37” [162mm].

1. Use the supplied template (on the back cover of this manual) to

drill the engine mounting bolt holes.

2. Install the standoffs to the engine
with the included 5 x 25mm SHCS
and 5mm fl at washers (it’s a good
idea to use 5mm lock washers
between the SHCS and the fl at
washers). Next, install the engine
with standoffs to the fi rewall using

(4) 5 x 20mm SHCS with 5mm
lock washers and fl at washers (not included). Use threadlocking
compound, such as Great Planes® Pro™ Threadlocker (GPMR6060)
on all mounting screws.

3. Install the fuel tank in the airframe. Use only gasoline approved
fuel tank and fuel lines and a gasoline approved 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's 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.

Fuel Tank

Supply Line

to T-Fitting

Carb

Make connection line

between T-Fitting and

Carburetor as short

as possible.

Clunk Line

Drain/Vent Pressure Relief Line

Route to top-front of fuel tank interior,

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to prevent siphoning (2-Line Set-up)

T-Fitting

Fuel fill line

This line must be extended

to exit the bottom of the aircraft.

Filler Cap

or Plug

4. Install the throttle servo at least 12” [305mm] away from the engine.

Make sure that you get the carburetor’s full range of rotation with
your servo travel. Be sure to use a non-metallic linkage.

5. Install the choke servo (optional) at least 12” [305mm] away from
the engine. Be sure to use a non-metallic linkage.

6. Connect the ignition wire from ignition module to the spark plug.

7. Install the muffl er onto the engine. Be sure to use threadlocker

8

and that the ignition wire does not contact the muffl er.