User manual

3
Starting the engine:
1. According the engine connection method, install the engine on RC airplane and lock propellers.
Made the carburetor initial setup and connect the spark plug, electronic ignition and sensors, put the fuel into the oil
tank, connect the power and radio control equipment.
2. Will power off the electronic igniter at this time, make the carburetor inlet port in a fully closed position. Through the
motor starter rapidly rotating propeller engine make the fuel in the tank inhalation of carburetor, please pay attention
to the suction of fuel should not be too much, otherwise will drown the spark plug, the engine start difficult.
3. Please open the carburetor throttle air inlet, power on the electronic igniter, then start the engine using the motor
starter, the engine will begin to work, the fans will adjust the carburetor according to your own need. According to
the above steps to adjust the carburetor adjustment.
Warning: Make sure all bystanders, especially children, at least 30 feet away from rotating engine.
Engine Break-in:
Please use the high quality synthetic oils, gasoline and machine oil’s mixing ratio is 35:1. NGH is recommended to use
smaller size propellers at first break-in and follow-up about 10 times in flight. Keep medium speed running for 15
minutes (no more than 4000rpm) after started engine, then high speed running (6500 rpm) for 3 minutes, again medium
speed running for 5 minutes, high speed running for 3 minutes, reciprocating 3-5 times complete break-in. Breaking in
engine carefully will increase its life. Please make sure the engine got the complete break-in before you use the larger
load propeller.
Engine cooling:
If your engine is installed in the fairing, there must be air entering to cool the engine and ensure enough air flowing in
the faring. Reference data: Outlet area should be 3-5 times than the entrance area to ensure adequate cooling.
Engine Failure Removal:
If the engine is difficult to start, idle speed and high speed unstable. Please check: whether the electric circuit and oil
line of engine is trouble, whether the engine leaks air, whether the electronic ignition works or its power supply is
adequate, whether the spark plug flame out. If necessary, replace with a new spark plug.
Engine Maintenance:
To reduce the fuel consumption, extend engine’s life, please adjust the engine’s highest speed and make engine run in
the output maximum speed of 90% once the gas pedal full opened. If the load is large ( Propeller’s diameter and screw
pitch are big ), the fuel must be adequate. If the load is small, the speed will be high while the fuel consumption will be
less; Please make sure to empty the carburetor after each flight, otherwise it’ll cause the rubber of carburetor aging to
affect the engine performance; Please clean the carbon deposition on the spark plug and keep the gap from 0.4mm to
0.5mm between the electrodes; If it’ s difficult to start the engine, idle speed unstable or when high speed operation
flameout, please replace the spark plugs; Please clean the engine surface after used each time, it can make the engine
get better cooling; The carburetor may be blocked seriously if you use different brands or types of lubricating oil
together, you need select a better fuel filter; If the engine low speed work for a long time, can lead to spark plug carbon
deposition; Regularly check the fuel system, make sure do not leak fuel, do not leak air.
Engine Guarantee:
If the NGH engine has performance defects caused by the defects of process, material and manufacturing, we certify
that: Change for free within one year and Guarantee within two years since the date you purchased. Please note the
guarantee is only for the original purchaser, not including: Normal wear for engine; damage caused by the failure of
maintenance; damage for engine over speed operation caused by using small propeller; Bearing rust; Crash; Use
inappropriate fuel; Damage caused by foreign bodies; Damage caused by unreasonable installation or operating
environment; Damage caused by improper dismantle; Damage caused by any modification.
The instructions are only for reference and are subject to change without notice.
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