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671 Gray compression

Old Marine Engine » Gray Marine Gas Engines - 4, 6, and 8 cylinder » 671 Gray compression « Previous Next »

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shaun welland
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Username: shaun

Post Number: 4
Registered: 03-2009
Posted on Wednesday, April 01, 2009 - 10:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)
I am haveing problems getting my 671 to run well I have done a compression test and all six are from 125 to 130 can any body tell me what is acceptable compression, for this engine,

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