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  • Re: Cylinder Heat exhaust bores

    by » 11 months ago


    Hi Garrick,

    Picture attached. Just measured the diameters. Muffler Bose OD 29.5mm

    Cylinder Head 1- ID 30.5mm

    Cylinder Head 2- ID 30.5mm

    Cylinder Head 3 - ID 31.0mm

    Cylinder Head 4 - ID 30.0mm

    Cheers,

    Tim

    24436_2_1FEAE831-0571-4B1D-B773-4F940E33B4A3.jpeg (You do not have access to download this file.)

  • Re: Cylinder Heat exhaust bores

    by » 11 months ago


    Tim, do the down pipes have any flexibility at the Muffler? I have emailed a friend who should know the tolerances for the heads I cannot them find in manual.


  • Re: Cylinder Heat exhaust bores

    by » 11 months ago


    Garrick,

    Yes the muffler does have flexibility joints on each down pipe with springs.

    Cheers,

    Tim


  • Re: Cylinder Heat exhaust bores

    by » 11 months ago


    Tim, this is what I got back from a Rotax expert apparently the tolerances are not available outside the overhaul shop.

    Hi Garrett,

    There is a part available for the exhaust port repair:

    image.png

    The AR in the table means "As Required".

    image.png

    The k refers to an endnote.

    image.png

    Item 27 is intended for just this purpose, but per the footnote, there is some machining involved.  The necessary data for doing that machining is in the Overhaul Manual, so the work must therefore be done by an Rotax overhaul shop. [END]

    You could also consult a machine shop to come up with a repair like machining the port then install a sleeve, when faced with replacing the heads you do not have anything to loose. Europa may have a newer exhaust system that is lighter/more balanced weight wise. Also worn out motor mounts may have contributed to the damage of the exhaust ports.


  • Re: Cylinder Heat exhaust bores

    by » 11 months ago


    Thanks Garrick for your help.

    Tim


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