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  1. #1
    New Member
    Join Date
    Nov 2012
    bowling green,ky
    satoh beaver s370d

    Default Satoh 370d

    how do i check compression on the s370d and what kind of numbers on the compression check should i be seeing?Thanks

  2. #2
    Bronze Member
    Join Date
    Jun 2007
    Virginia Beach, VA
    Satoh Beaver 2 wheel drive

    Default Re: Satoh 370d

    I removed the fuel injectors and adapted a compression tester to use those ports to check compression. I believe the specs called for around 400 PSI for good compression. Mine was reading about 300 PSI with the original rings. Replaced rings and initially before attempting break in, the compression was up to about 350 PSI. I don't have much time on the new rings, so haven't rechecked the compression ratio at this point.

    Someone with more expertise can probably give you better information, but this works for me.

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