EME 55II User manual

EME 55II Gasoline Engine
User Manual
Eagle Master Engine EME 55II User Manual ‐1‐

SAFETY INSTRUCTIONS
◎Thank you for purchasing EME 55II gasoline Engine. We at EME
always strive to product reliable engines that bring you pleasure of
flight. It is vitally important to read SAFETY INSTRUCTIONS very
carefully before operating EME 55II gasoline engine.
◎Gasoline is POISONOUS and HIGHLY FLAMMABLE. Do not
allow it contact with the eyes or mouth. Always store it in a cool and
dark place, out of the reach of children. It is possible that the fuel can
damage your health. Always store and transport it in an antistatic
container.
◎DO NOT start the engine in an area containing loose gravel or sand.
NEVER start the engine indoor.
◎For their safety, keep all onlookers (especially young children) well
back (at least 5 meters behind the engine). NEVER stand at the front
of, or to the side of the engine when it is running.
◎Check and tighten your propeller and spinner before one day’s flights.
DO NOT use a Nylon propeller. NEVER try to repair and use a
broken propeller.
Eagle Master Engine EME 55II User Manual ‐2‐

Specifications
Item
Technique Data
Displacement
55.6 cc
1380 g/Engine, 180 g/Muffler,
Weight
140 g/Ignition Module
Compression
7.6
Ratio
Power
5.7 HP @ 7500 RPM
Idle RPM
1350 RPM
Practical RPM
1350 ~ 7500 RPM
Thrust 1
14.2 kgf (50~200 m Altitude)
Thrust 2
12.5 kgf (1800~2000 m Altitude)
Spark Plug
EME / NGK CM6
Ignition Voltage
7.4V-8.4V
91~93 Octane，1:30~1:35 Mix
Fuel
Ratio
Package Contents
Item
Quantity
Engine
1 pcs
Muffler
1 pcs
Ignition Module
1 pcs
Spark Plug
1 pcs
Stand-off Spacer
4 pcs
M5*15 (front), 4 pcs
Spacer Screw
M5*22 (rear), 4 pcs
M5*4 for rear mounting
Spacer Washer
spacers
Muffler Screw
2 pcs
Muffler Gasket
1 pcs
Manual
1 pcs
Logo Tag
1 pcs
Eagle Master Engine EME 55II User Manual ‐3‐

Mounting the Engine
◎The engine should be mounted on a firewall that will in turn mount to
the fuselage. The firewall should have enough strength to prevent
engine vibration. The firewall should be made from at least 6 mm
aircraft plywood.
◎A tension free mounting is obligatory. The mounting surface should
be even. Mount the engine with high tensile bolts and stand-off
spacers, which are provided with the engine.
◎Proper cooling is vital for gasoline engines. Intake area should be
more than 60*80 mm. Outlet area should be at least as 3 times as the
intake area.
Ignition Information
◎Install the ignition module with sufficient anti-vibration, at
least 100 mm away from the engine and in the place where not
affected by engine exhaust heat and radiation heat.
◎Do not share the battery with receiver. Use separated battery for
ignition module. Equip an ON/OFF switch between the ignition
module and battery. Use a high quality switch such as Futaba HSW-J
or HSW-L heavy duty switch. Standard size receiver switches are not
recommended.
◎Install the ignition module and make its cable, switch and battery be as
far as possible away from the servos, the receiver battery and the
receiver.
◎Install the spark plug cap on the plug securely. Protect the signal wire
and high voltage spark plug cable from rubbing against fiberglass,
sharp edges of wood and metal of the fuselage.

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Propeller Option
◎A wooden propeller, as well as a carbon fiber propeller, is suggested.
Do not use a nylon propeller. XOAR，HAWK，VESS and MENZ
wooden propellers are suggested . XOAR，FALCON，RED
SWORD and MEJZLIK carbon propellers are also suggested. Since
there are so many good propellers on the market, your choice is not
limited to the brands mentioned above.
◎22*10, 23*8 and 23*10 two-blade propellers are suggested. With the
propellers mentioned above, the peak RPM range should be 6,300 to
7,100 RPM.
◎20*12, 21*10, 21*12 and 22*10 three-blade propellers are suggested
for scale purpose.
Starting Process
◎Close the choke and switch on the ignition switch. Advance the
throttle 1/8~1/4 from full closed.
◎Flip the propeller quickly until explosive sound can be heard.
◎After propeller stopping, open the choke and set the throttle to idle
position(or a little higher). Flip the propeller again until the engine
starts. BE CAREFUL!
◎Warm up the engine for about 30~45 seconds. Now the engine is
ready for flight.
Eagle Master Engine EME 55II User Manual ‐5‐

Fuel & Break-in
◎Use low to middle octane gas for break-in. Use the propeller same as
flight.
◎Use qualified 2-stroke petroleum based or synthetic oil with a mixture
of 25:1 to 30:1 in the break-in process。
◎With this fuel mixture ratio and regular needle setting, run the engine
for 1~2 hours. Too rich needle setting, which may cause misfiring or
erratic running, is not suggested.
◎After break-in, you can use a 2-stroke synthetic oil with a mixture of
30:1 to 35:1.
Needle Adjustments
◎A Walbro WT664A carburetor or equal carburetor is adopted. The
carburetor has two needles, which are low speed needle and high
speed needle. Low speed needle is effective through the high speed
range, while the high speed needle is not effective in the low throttle
status. Both needles are effective in the mid speed, but the low speed
needle is more effective. Default position of high speed needle is 1 ½
turns from full closed, as well as low speed needle is 1 ¼ turns.
◎For fine setting, please tune the engine for maximum RPM with the
high speed needle by using a tachometer. Then richen the high speed
needle until the motor runs 100~200 RPM less than the maximum
RPM. Now the engine is slightly rich on the high speed needle.
◎Furthermore, keep the engine at idle for 45~60 seconds. Check that
the idle RPM remains constant or not. If the RPM drops and the
engine stops finally, the speed needle should be too rich. Lean it until
stable idle status is achieved. Then check the transition with advancing
throttle quickly. The engine should make steady power immediately
without any hesitation. If the engine sounds hesitated to response,
please check the low speed needle again.
Eagle Master Engine EME 55II User Manual ‐6‐

Mounting Pattern and Dimensions
Carburetor Introduction
Eagle Master Engine EME 55II User Manual ‐7‐

Engine Maintaince
◎NEVER mix different kinds of 2 stroke oils for flying. Before
changing oils, please clean the carburetor with pure gasoline.
◎To avoid incident carburetor failure, please remove carburetor pump
cover and clean the built-in fuel filter every 50~100 fights.
◎It is advisable to maintaince or replace piston, piston ring, crankshaft,
needle/ball bearing and spark plug every 300~500 flights, according to
engine status. Please consult your local dealer.
◎Please examine and clean your engine very carefully after a crash. If it
is damaged, please consult your local dealer to fix the engine. Repair
due to crash is NOT free.
WARRANTY
◎EME 55II engine and ignition module are covered with 18 months
warranty by Eagle Master Engine since purchasing date.
◎The warranty covers defects of materials and assemble issues.
◎Damage by improper installing, operation is not covered by warranty.
◎Damage by using improper fuel is not covered by warranty.
◎Damage by incident crash is not covered by warranty.
Eagle Master Engine，Yinghuang Technology Co., LTD
Chang Cheng Industry Park，Yongkang City, Zhejiang Province, China
Web: www.emehobby.com ; Mail: [email protected]
Tel：[phone] ； Fax：[phone]
Eagle Master Engine EME 55II User Manual ‐8‐