I am running a Rotax 912ULS in my Savannah XL. I have the standard fuel flow meter (needle type). Normal fuel pressure is around 4 to 4.5 but this drops to to around 1.5 to 2 when I am at 4500 to 5500 feet AGL. The needle recovers to 4 - 4.5 when I descend to 1500 feet. No evidence of engine malfunction at all. Any ideas about this and how one might fix it?
  • Re: Fuel flow meter anomaly

    by » 11 years ago

    HI David,

    Out of curiosity do you have a fuel re-circulation line installed?
    What happens if you stay at 5500 AGL or go higher?
    If you change the throttle position for any length of time does pressure change and what rpm are you cruising at?
    Does it ever change when at the lower altitudes?
    How are the engine temps?

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

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