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  • Re: Pilot Jet 35

    by » 2 years ago


    Tried to measure my return line restrictor/orifice this afternoon - its smaller than a 1mm drill bit. Will take some Oxy cleaning rods, on next visit - one will fit & I can get back to you with a more accurate dimension.


  • Re: Pilot Jet 35

    by » 2 years ago


    Making the jet size too large could cause a bypass of too much fuel in certain circumstances. Why not leave well enough alone since it's been this way for decades and worked just fine. There needs to be safety margins in things we do and if you increase the jet size you may be on the edge of having a fuel issue when limits are reached.


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


  • Re: Pilot Jet 35

    by » 2 years ago


    Hi Roger,

    Sean is not looking to increase the jet size. He is thinking his current return line orifice may be too large, creating a pressure drop under a full throttle climb.  He is planning on reducing it to the specified #35 jet size (.35mm) if he finds that it is larger than that now.  


  • Re: Pilot Jet 35

    by » 2 years ago


    Ah, Okay.

    The jet size should be stamped on the jet.


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


  • Re: Pilot Jet 35

    by » 2 years ago


    The 912 ULS installation Manual mentions the "Integrated Orifice (Pilot Jet 35)" in Chapter 73-00-00, Page 11, Figure 7.6
    Page 12 describes the Orifice as 0.5mm (0.0197")


    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.


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