Mile HaoXianG Model Technology DLE-55 User manual

Carburetor can be turned 180 degrees for use. Please be aware of gasket direction.
Engine Start
1. Close the choke and turn on the ignition, Advance the throttle to the full position.
2. Flip the prop until the engine fires and dies. It may take a few more flips if it is the initial
engine start.
3. Open the choke, advance the throttle to just above idle, flip the prop until it starts.
Maintenance
1. Use standard or premium unleaded.
2. Break in engine for 2 hours at half throttle.
3. Check fuel system for air leaks when running.
4. Keep the engines exterior clean and inspected regularly.
5. Keep fuel filter clean.
6. Remove and inspect reed valve every 6 months.
DLE Engines are made by Mile HaoXianG Model Technology Co. Ltd
DLE
Engine
User Manual
DLE –55
Caution –Read Manual carefully before operation. Serious injury may result from improper use.

USER Manual
DLE series engines are a professionally designed engine for model aircraft. With its
high power output and light weight its ideal for your model aircraft. Read and follow
all of the instructions before you use your engine.
Safety Instructions
1. Engines are not a toy. Serious injuries may result from improper use. We are
not responsible for any injury, damage or other loss resulting from its use.
2. Before every use check the engine assembly, propeller and airframe carefully
for loose screws and nuts. Loctite is strongly recommended on all screws.
3. During the break-in process the engine must be mounted on a shock absorbing
mount or in a model aircraft.
4. Always stand clear of and behind of the propeller, never allow anyone
including yourself to be in front of or to the sides of the propeller when starting
or running the engine. Anyone near the engine should wear protective eye
ware. Do not wear loose clothing near the engine or propeller.
Specifications
1. Performance
5.5 HP at 7500 RPM
Idle speed –1350
Static thrust at 100m altitude –14.2 Kg
Static thrust at 1800m altitude –12.5 Kg
Recommended Props: 22x8; 22x10; 23x8; 23x10
Spark Plug - CM6 or equivalent
2. Parameters
Exhaust Amount –55.6 cm3
Piston Diameter x Stroke; 45mm x 35mm
Compression ratio –7.6 : 1
Ratio of lubricating oil: Mineral based oil –32-1
Synthetic Oil –between 32-1 and 50-1
Weight: Engine –1310g
Exhaust –100g
Ignition –120g
Carburetor Adjustment
Every engine has been adjusted to average mixture settings which will most likely allow the engine
to start and run in most locations. However as altitudes and barometric pressures vary by location, it
is very likely that the carburetor mixture settings will need to be adjusted to obtain optimum
performance.
1. Choke lever
2. Throttle lever
3. Idle speed adjustment screw
4. Low speed adjustment screw
5. High speed adjustment screw
Carburetor Adjustment
A general starting point is 1.25 turns out for the low speed needle and 1.5 turns out for the high
speed needle. Adjust the high speed needle for peak RPM. If the engine slows or dies while at full
throttle the high speed mixture is likely too lean. Adjust the low needle until you achieve a smooth
idle and a reliable transition to high speed. If the engine dies when the throttle is advanced the
mixture is likely to lean. If the engine stumbles when the throttle is advanced the mixture is likely
to rich.
Caution: Do not be tempted to run an overly rich mixture. A rich mixture will only result in
poor engine performance, Premature carbon build up, a fouled plug and excessive exhaust residue.
However a lean mixture will also damage the cylinder and piston.