4
Engine installation:
NGH 4-stroke engine mounted on a suitable RC aircraft has two common ways of installation, as shown below:
FIG. 3
FIG. 4
FIG. 3: Rail bracket installation; FIG. 4: Rear bracket installation.
We suggest that RC hobbyist use "FIG. 3" installation. It can effectively reduce the high frequency vibration of
four-stroke engine running at a high speed.
Notice:
Please make sure to install a firewall on the back of RC aircraft using metal flat washer or ratchet nut to prevent
the pawl bolt into plywood. Be sure to check before you fly if there are loose bolts.
Rail bracket Rear bracket
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.
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