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Thread: Evinrude 30hp 91 compression

  1. 28-03-2013, 12:12 PM #1
    Rhys_Mav
    Rhys_Mav is offline
    Ausfish Bronze Member
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    Jul 2010

    Evinrude 30hp 91 compression

    hi i have a 91 evinrude 30 hp 2 stroke, i did a compression and got 115 psi on both cylinders. Does this sound ok, i cant really any info any where on compression specs.
    Thanks in advance.

    Rhys
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  2. 28-03-2013, 12:44 PM #2
    robsue
    robsue is offline
    Ausfish Gold Member
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    Oct 2006

    Re: Evinrude 30hp 91 compression

    when they did a compression test on my 60hp merc for a trade my 3 cylinders were 125,125,120, and i asked is that ok, mechanic said as long as they are not more than 10% variation between them, is the main thing, so going by that yours are good, someone else may be able to help you more
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