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Hogarth Kramer

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  1. I built and fly a Van’s RV-12 with a Rotax 912 ULS and a Dynon Skyview with autopilot. I have just a few small details of possible interest. First, the Rotax is started with choke on and the throttle completely closed. Opening the throttle disables the choke. It is also only rough at idle if you leave the choke on (because the mixture is too rich), and you should never go over 2,400 RPM until the oil reaches 120 F. It is normally a very smooth engine. It does have two carbs and if they are out of balance, you might get a little vibration at idle. Carb balancing is pretty simple to do, though,
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