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firstnautique
04-02-2004, 10:37 AM
Does anyone know what the tollerance is for the compression is on a GT-40 Motor. I am buying a 98 Air Nautique and am having it inspected and will be having a compression test done, so I need some numbers to compare it to.

Thanks,

Brian

tryan
04-02-2004, 11:08 AM
not from any book, but i would hope for 140-150 with a warm engine, all plugs out and open throttle body. difference between cylinders is what to look for.

wburg64
04-04-2004, 05:30 AM
10% between all 8