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    Mercruiser 4.3 V6 1992 Intermittant

    Hi, I have a mercruiser4.3 V6 1992, which will run fine at times and other times will only run on one bank of three cylinders. Even when on three cylinders, the three not running are still getting a good spark. All six cylinders have compression of 145 to150. Anybody got any ideas.
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