Instructions for use

4
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. Power off the electronic igniter at this time and close the carburetor choke. Rapidly rotating the propeller of the
engine and make the fuel in the tank sucked into carburetor, please pay attention to the suction of the 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 15m away from rotating engine.
Engine Break-in:
Please use high quality synthetic oils, gasoline and machine oil with mixing ratio 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, at last 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 engine being installed in the fairing, there must be enough air being pulled in to cool the engine, and it's necessary to
assure enough air flowing in the faring.
Reference data: Outlet area should be 3-5 times bigger than the entrance area to ensure adequate cooling.
Engine Failure Removal:
If the engine is difficult to start, or idle speed or unstable in high speed. 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.
Rule out engine failure:
If the engine is difficult to start, or idle speed or unstable in high speed. Please check: whether the electric circuit and oil
line of engine is trouble, check if the engine leaks air, or if the electronic ignition works, or if its power supply is
adequate, or if the spark plug flame out or if the cap is stick its right position. 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 0.7mm to
0.8mm 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.
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