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Nynja Build manual 1.0
26.6.5 912 Idle Adjustment
The throttles on the 912 engines are sprung to the open position and rely on the
cables being pulled taught to achieve the idle setting.
To get a reliable idle setting first loosen the idle adjustment screw(s) on the
carburettor(s)
– they are
NOT
used to set the idle in this installation!.
The pilots throttle lever has its own stops and its these that set the idle. They are
drilled off centre and can be rotated to set the desired idle speed.
However initially set the idle with these stops rotated in a mid way position and lever
fully closed against them, by means of adjustment on the cable outers at the
carburettor.
Carburettors should also be balanced at this time (specialist engine balance tools
exist for this
– you can buy them yourself (a good investment if you intend to maintain
the engine yourself), or call in a Rotax trained service technician).
When this is complete, check that the idle screws are still adjusted so as not to touch
the carburettor levers.
Fine idle adjustment can then be made using the stops on the pilots throttle lever.
If your engine idles with the lever held rearwards, but the RPM springs up
significantly when it is released, then the setup is not correct. The most likely causes
are:
1. Carburettor levers touching the stops on carbs before the throttle lever
touches its stop
– wind them well clear!
2. Insufficient throttle lever friction.
3.
Too much throttle lever friction (causes a „stepped‟ opening and closing)
Summary of Contents for Nynja Build
Page 1: ...1 Nynja Build manual Version 1 0...
Page 2: ...2 Figure 1 tube numbering scheme...
Page 3: ...3 Figure 2 Basic frame Skyranger...
Page 4: ...4 Figure 3 uncovered Skyranger frame...
Page 5: ...5 Figure 4 Uncovered Nynja frame Figure 5 Nynja fuselage with rear fairings removed...
Page 6: ...6 Figure 6 Nynja fuselage with rear fairings removed rear view Figure 7 simply assemble thus...
Page 22: ...22 Figure 13 forward fuselage from front quarter Figure 14 Cabin upper rear corner...
Page 60: ...60 Figures 65 cable arrangement further overview...
Page 86: ...86 Figure 100 Nynja elevator joiner with integral control horn...
Page 113: ...113 Figure 135 front jury strut attachment Figure 136 rear jury strut attachment...
Page 183: ...183 Figure 231 heavy duty power wiring schematic Rotax 912...
Page 184: ...184 Figure 232 low current wiring schematic Rotax 912...
Page 185: ...185 Figure 233 instrument wiring schematic Rotax 912...
Page 200: ...200 Nynja Build manual 1 0 18 2 One Piece Door Figure 250 one piece door frame...
Page 256: ...256 Nynja Build manual 1 0...
Page 257: ...257 Nynja Build manual 1 0 27 2 Wire locking...
Page 258: ...258 Nynja Build manual 1 0...
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