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    "STUMPED ON A 1998 EFI Mercury 225, One Bad cylender".... Need Help!

    I have a 225 EFI 3.0 Mercury that has one bad cylinder on the bottom left side on the passenger side of the boat. Not sure what the number is of that*cylinder. But it’s the bad one. How I found the bad cylinder. I pulled out the spark plugs on all the cylinders and found metal build up on the...
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