Starting Engine - Desert Aircraft DA50 EFI Owner's Manual

DA 50 EFI OWNER'S MANUAL HFEDCN0374 REV C
throttle), the ECM will remove power to both the injector and ignition system,
thus stopping the operation of the engine.
3. (UAV option) Provide 5V to the enable line; when power is removed ECM will
remove power to both the injector and ignition system thus stopping the
operation of the engine.
4. Any 3 cell LiPo, 4 cell Lifepo4, or equivalent battery with a minimum of
2000mA/hr rating will run the engine for up to 2 continuous hours.
3c. Starting Your Engine for the First Time
1. Verify that the ECM is powered up (Blue Light on ECM).
2. Verify that the throttle setting is between 25%-30%.
3. Prime your system for the first time by removing the fuel line from the back of
the throttle body. Cycle the battery power to the ECM in 5 second intervals
until fuel is flowing from the fuel line, then re-install the fuel line. You should
not have to complete the priming process again unless the engine fuel system
is allowed to run dry or has been disconnected for any reason.
4. The engine should be started using an external spinner, or using a built-in
starting alternator. Flip starting is an additional option but is not
recommended due to possible injuries.
Note: The engine may struggle to run for the first few minutes as it is purging
all the air from the fuel system. This may not be evident until you go to wide
open throttle.
5. Allow the engine to run for a few minutes at idle; around 3000 RPM.
6. Hold at wide open throttle for 15 seconds to verify that the air in the fuel
system has been purged.
7. Reduce the engine speed to idle; around 3000 RPM. The engine is now ready
for flight.
See HFE "Released Documents" folder for latest revision.
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