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 is installed in the fairing, there must be enough air coming in to cool the engine, and make sure there is enough air circulation in the
fairing.
Reference data: The exit area should be 3-5 times the inlet area to ensure adequate cooling, and if necessary, the rear cylinder should be
diverted to keep the rear tank cool.
Engine Trouble Removal:
If the engine is difficult to start, idle or idle speed is 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.
If the engine finds that a cylinder is not working at low speed, you only need to increase the throttle slightly to make the cylinder to work
properly that does not work.
Engine Maintenance:
In order to reduce the fuel consumption and extend the life of the engine, 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 (the diameter and pitch of the propeller are large), the speed
will be lower and the fuel consumption will be higher; if the load is small, the speed will be high, but the fuel consumption will be less; Please
make sure to empty the fuel in the carburetor after each flight, otherwise it’ll cause the rubber of carburetor aging and affect the engine
performance; Please clean periodically 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 it is flameout during high speed operation, and there is carbon deposits in the spark
plug, please replace the spark plugs; Please clean the engine surface after used each time, it can make the engine to 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;
Long-term low-speed operation will cause the spark plug to deposit carbon; Regularly check the fuel system to ensure no oil leakage and no
air leakage.
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.
Web: www.nghengine.com
E-mail: ngh@ncdmoly.com
xhlgjywb@163.com
Skype: blue-sky-tan
Packing list:
Valve clearance adjustment plug sheet
Operation instruction manual
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