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http://www.ultralightnews.ca/ Page 23 of 39
The Ultralight Store - your one stop ultralight store.
and repeat starting procedure. If engine fails to start do not repeat this step as engine will become
flooded.
5.As soon as engine runs on it?s own, turn off starter and keep engine running with 2-3 short accelerations.
6.Warm engine at 2000-3000 RPM under a light load.
6.6Operating condition of the engine
While the engine is running, the cylinder head temperatures and the exhaust gas temperatures should be
monitored. As long as the maximum-temperatures of the cylinder head- and/or exhaust temperature are not
exceeded, the engine can be run without a time limit in the set load range (also full load at maximum
performance). It is also recommended to monitor the fuel pressure during operation. Lack of fuel pressure
can lead to a loss of performance and cause the engine to fail.
Hot engine
1.Turn on the ignition system.
2.Turn on the injection system.
3.Start the engine with throttle slightly open. Should the engine not start under those conditions, open the
throttle slowly while starting the engine.
Note: If engine doesn?t start, stop the starting sequence after a maximum of 20 seconds. After a
short break, repeat starting sequence.
4.As soon as engine runs on it?s own, turn off starter and keep engine running with 2-3 short accelerations.
5.Warm engine at 2000-3000 RPM under a light load.
If the engine has a centrifugal clutch installed within the drive system, then the following should be observed
1.Warm up the engine at revs in which the centrifugal clutch is engaging firmly.
2.Warm up the engine at revs in which you can ensure that the centrifugal clutch is not engaging.
Since in this case the warming up revs are very low, the length of the warming up time should work
out appropriately longer.
Note:
If the warming up phase or running takes place at the level of rpm?s where the centrifugal clutch engages,
then increased wear on the linings, glazing of the linings or overheating of the clutch will result.
6.7Shut down the engine
Before the engine is switched off, it should be run for a minute in a load free condition at idling revs. Due to
the working fan, the cylinder head temperature should reduce. This procedure should always be followed,
since an engine that is switched off directly after a high load condition tends to overheat.
1.Turn off the injection system.
2.As soon as the engine quits, turn off the ignition system.
Comment: You must remember to turn off the ignition system, because it may cause damage to the
ignition electronics. Furthermore, by touching the primary side, the remaining voltage may
lead to a shock.
6.8Adjustments
The system is adjusted at the factory. The idle was adjusted to 1700-1800 RPM without any load (without
propeller and gearbox). The throttle valves and throttle position sensor are synchronised to each other and
cannot be changed.
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