Great Power Engine GP178 Manuel d'instruction - Page 10

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Idle the engine for 2~3 minutes (lower than 2500 RPM).
1.
Slowly push the throttle forward at around 4000~4500 RPM and run on one tank of fuel. Next,
2.
shut the engine off and let it cool down.
Restart the engine at idle for 1 minute. Then slowly push the engine to full throttle. Do not remain
3.
at full throttle for more than 5 seconds. Make sure the needle settings are correct and the engine is
running smoothly.
Shut off the engine again and let it cool down before putting the cowling on and fly the plane. If
4.
broken-in properly, the engine will run smoothly from the beginning and progressively improve as
flight hours accumulate.
Caution:
Make sure you have a proper cooling system on your plane before flying.
Do not operate the engine at full throttle for over 10 seconds before it has been broken-in.

TOUBLESHOOTING

Make sure the battery voltage is over 6.6+ when under load.
1.
Check all the ignition connection, wiring, and switches.
2.
Check the fuel system for clogs, jams, or bad fuel lines.
3.
Make sure the propeller is flipped over with authority.
4.
The carburetor mount must be tight or the engine may not start because of air leaks.
5.
When too much fuel drips from carburetor, the engine may be overflowed. If so, you can
6.
(a) Turn off the ignition system and make sure the choke and throttle are completely open.
(b) Flip the propeller for about 10 times at full throttle.
(c) Close the throttle to idle position and follow the starting procedure again.
(d) For single-cylinder engines (GP38, GP61 and GP88), you can unscrew spark plugs to check
contacts, and dry or replace them. Further starting must be done with the throttle turned down.
However, if the spark plugs are dry, then the fuel drawn into carburetor might not be enough.
With standard starting procedures, if the engine starts and then stops immediately, the low needle
7.
is probably too lean. Turn the low needle counterclockwise for around 1/8 turn.
If the engine does not reach a normal RPM at full throttle, go back to GP mufflers and original
8.
needle settings. If the problem persists, the causes may be
(a) Low battery
9.
(b) Diameter of the propeller larger than recommended
(c) Incorrect fuel and oil mixture
(d) Muffler/ pipe system affects the RPM. If you use a pipe, make sure length of the header and
Please refer to Choosing a Propeller
3
Please refer to Fuel and Oil Mixture
4
(Engine Won't Start)
4
9
3