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  1. 1

    Rotax 447 can't get above 3,000' MSL

    Problem solved! It ultimately turned out to be a micro air leak in the seal where the rubber boot secures the carb to the intake manifold. I hadn't checked that because it was a brand new part... and virtually idiot-proof to install. In case you're wondering... I didn't install it backwards...
  2. 1

    Rotax 447 can't get above 3,000' MSL

    It ran great after the overhaul until recently. I did some experimentation with an adjustable fuel mixture system and the EGTs got to 1225°F very briefly, but the CHTs never got above 350°F. However, that's when the troubles started. I checked the torque on the cylinder head nuts, exhaust...
  3. 1

    Rotax 447 can't get above 3,000' MSL

    The air temps have ranged from 50°F to 75°F when the problems started occurring. I though that I had it fixed yesterday, when I got to 3,600' (OAT @ 55°F), but the problem returned that same afternoon. The problem happens on humid days, drier days... no pattern that I can see. My nest step...
  4. 1

    Rotax 447 can't get above 3,000' MSL

    I'm now stuck with a 3,000' service ceiling. This problem has just recently developed. I need help because I usually fly at 3,500' - 8,500'. If any of you have suggestions, please contact me at [email protected]. My Rotax 447 (with a 36mm Bing 54 carb and silenced intake) flew fine last...
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