Great Power Engine GP-61 Руководство по эксплуатации - Страница 9
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Symptoms of Running Rich
When an engine is running rich, the fuel-to-air ratio is off because the carburetor is delivering too much
gasoline. (1) Signs that high needle is too rich include sluggish performance, excessive amount of smoke
from exhaust, engine stalling on acceleration. (2) Signs that low needle is too rich include engine easily
overflowing at starting procedure and slow throttle response between low and mid-range RPM. In
general, typical symptoms of a rich mixture are:
Poor fuel economy
Sluggish acceleration
Choke not needed from cold starts
Sooty or black spark plugs
Sooty or black muffler end pipes
Strong smell of gasoline when the engine is at idle
Uneven running (will often slow from regular idle RPM and then stop)
STARTING PROCEDURE
1.
Make sure propeller bolts are all well tightened.
2.
Make sure the area is clear of any kind of debris, sand, dirt or gravel.
3.
Have someone with eye protection firmly hold the plane. At least two people are required to start
the engine.
4.
Wear heavy-duty leather gloves when starting the engine.
5.
Switch the radio system on and make sure all controls work correctly and are in correct direction.
Set the throttle cut switch to fully close the throttle and shut the engine off. After setting it up, re-
test for the throttle to make sure it will shut the engine off.
6.
Switch the ignition on and close the choke. Next, flip the propeller until the engine starts and runs
for a few seconds.
7.
Release the choke and the throttle setting should be a little higher than idle position. Quickly flip
the propeller. It usually takes 5 to 10 flips to start the engine. Beware of the possibility of engine
starting on any single flip of the propeller anytime, even if the ignition is off.
8.
After the engine starts, slowly push the throttle to low idle and warm up the engine for 30 seconds.
Next, slowly open the full throttle and hold it for 5 seconds to make sure the engine can maintain
maximum power. Lastly, move throttle back and set the idle at low RPM.
BREAK-IN
Always break in the engine on a plane. If you break in the engine on a test stand, even with a proper
cooling system, it might still cause the engine to overheat. An engine is considered fully broken-in after
25 liters of fuel. The break-in procedure is as follows.
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