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  1. #1

    Default Engine compression

    Just wondering what the std compression should be like
    It's a 2004 5.7 indmar 5.7 is this ok
    1-175, 2,3-180 4,5-190 and the last 3 are at 200
    Just wondering if this is normal or something to be concerned about the boat only hAs 150 hrs


    From mooseknuckle sledding lodge

  2. #2
    Join Date
    Nov 2009
    Location
    Gatineau, Quebec
    Posts
    163

    Default

    Did you check the comp with all the plugs removed so the engine cranks freely ?
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  3. #3

    Default Engine compression

    I had z dealer do it


    From mooseknuckle sledding lodge

  4. #4
    Join Date
    May 2009
    Location
    Carlton Oregon
    Posts
    6,019

    Default

    Quote Originally Posted by Tkosleded View Post
    Just wondering what the std compression should be like
    It's a 2004 5.7 indmar 5.7 is this ok
    1-175, 2,3-180 4,5-190 and the last 3 are at 200
    Just wondering if this is normal or something to be concerned about the boat only hAs 150 hrs


    From mooseknuckle sledding lodge
    You need more info to know if its good or not.
    You need to know what the compression ratio for the engine is.
    It could be 9.0-1, 10.0 to 1, or any number. Knowing that you will be able to see if 175-200 is a good number.

    Generally you want them all to be with in 10% of each other.
    Just looking at your numbers cylinder 1 is 175 and 8 is 200. That's 11% difference between all cylinders.

    Just going by that I would say your engine is in good health and wouldn't worry about it.
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  5. #5

    Default Engine compression

    Thanks


    From mooseknuckle sledding lodge

  6. #6
    Join Date
    May 2003
    Location
    south east michigan
    Posts
    243

    Default

    The number doesn't mean much as all compression gauges read different numbers according to the brand.The difference in cylinders is the important part. #1 cylinder is a hair low but as mmandely said I wouldn,t worry about it.
    jy

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