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  1. #1
    my ski has thrust vectoring......does yours??? killcraft's Avatar
    Join Date
    Jul 2009
    chesapeake Va.

    proper compression

    hey i did a search for this and found nothing what is the proper compression for a 650 engine i got 160 in one cylinder and 105 in another

  2. #2
    seaobin's Avatar
    Join Date
    Jun 2007
    Raleigh, North Carolina, United States
    150 or so is good, but more important is that they are within 10% of each other. looks like you need to hone and re-ring

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