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On my 3rd solo flight, on climb (last night) the EGTR went to 1465 (just at the bottom of the yellow while the EGTL stayed in the green. I noticed this as I throttled back at 2100 FT. I turned around and landed. At the end of the landing both were in the green. I pulled the cowl, nothing looked out of the ordinary. I pulled the plugs and #3 seemed grey while the others were black. Any ideas as to what my problem is? This is the first time this has happened. Just turned 67 hours.
  • Re: RV12 912ULS high EGT

    by » 9 years ago


    1465F for an EGT is no problem. There may be a 0-80F spread on EGT's at certain throttle settings and it will be different from plane to plane. Mine runs around 1400F-1450F all the time. Things like this can come from a carb imbalance, an air leak, plugs gapped differently, carb float armature not at proper adjustment,, poor air intake setup, ect...

    Look in the Operator's manual and you'll see the temperature parameters.

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


  • Re: RV12 912ULS high EGT

    by » 9 years ago


    I thought this was a very good article by a very knowledgable person, Mike Busch, about EGT readings.

    http://www.gami.com/articles/egt_myths.pdf

  • Re: RV12 912ULS high EGT

    by » 9 years ago


    dont worry about the actual numbers on the EGT gauge, older analogue gauges didnt even have numbers, whats important is the amount either side of the EGT peak.. also, temperature probe position will alter the reading..

  • Re: RV12 912ULS high EGT

    by » 9 years ago


    Something I took for granted was probe placement. Robert is right that a probe placement can affect your readings. 100mm or 3.9" out from the exhaust port. It talks about this in the installation manual. Still 145F isn't bad.

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


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