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Due to heavy rain, I have water in my crank case and oil system of my Mercruiser 228 (1978 V8 GM 305 block) inboard boat engine.The water did not get high enough to affect the carburetor or fuel or electrical systems. I have drained out the tainted oil and removed the oil filter for replacement. I have opened up the oil fill on each of the valve covers in attempt to get air in there to dry them out the best I can. What else should I do to make sure there is no remaining water?

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  • scott_jahnke Jul 29, 2010

    Here is the first solution I receivd. Just looking for 2 opinions. :) Use a chemical engine flush. Run for about 15 minutes and redrain the crankcase. This should get the vast majority taken care of. Under normal conditions you will get condensation. Whether marine or automotive. You are doing and being a great boat owner.....PARANOID!!! In a boat we both know it will save your life and your passenger's lives!

  • scott_jahnke Jul 29, 2010

    Thanks Guys!

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  • Chevrolet Master
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Well, it seems like you've taken steps to remove the water.

So, I think that if you do a couple of oil changes, it should expel the water fron the engine.

Luckily, it wasn't submerged in salt water.

Good luck on this repair.

Posted on Jul 29, 2010

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  • Master
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Use a chemical engine flush. Run for about 15 minutes and redrain the crankcase. This should get the vast majority taken care of. Under normal conditions you will get condensation. Whether marine or automotive. You are doing and being a great boat owner.....PARANOID!!! In a boat we both know it will save your life and your passenger's lives!

Posted on Jul 29, 2010

  • Kori Policy
    Kori Policy Jul 29, 2010

    It is normal to get some condensation due to moisture in the air. You can also look at any ventilation from the crankcase to the outside aptmosphere which can draw in moisture. Once the crankcase is drained and cleaned it is easier to keep tabs on the amount of moisture that is trapped after a run.

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