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Old 05-28-2015, 04:23 PM   #21
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Noo! Stop! Milky oil means water leak in the engine. From a variety of possible sources.



Your engine is hydro locked, pull spark plugs and drain oil immediately!
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Old 05-28-2015, 04:25 PM   #22
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Continued attempting to crank it will destroy the motor, if you haven't already. I learned this lesson the hard way and destroyed the Merc 350 in my old boat by continuing to crank a hydrolocked motor. We believe I bent a connecting rod and/or destroyed a main bearing due to the engine sitting full of water.
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Old 05-28-2015, 04:32 PM   #23
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Wow! ok I'll do that, Hoping the engine is ok
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Old 05-28-2015, 04:41 PM   #24
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Pull the plugs one by one. You will get water out of some of them. Take note of which plugs water comes out of. It may be important later.



Drain the oil and change the filter. (this will be a messy job depending on how much water is in there). Refill it with new oil and a new filter. Use cheap oil because you are going to change the oil again as soon as everything is fixed.



Open the drains under the exhaust headers on both sides to drain the exhaust, and the block drains on either side of the motor itself to drain the block. If your boat is in the water, take the belt off so that the water pump wont run.



Crank the engine untill you get oil pressure (it will likely crank very easily now) and continue cranking for a few moments with oil pressure (this is washing water out of passages in the engine).



While you are cranking listen to the engine very carefully for clunks, bangs, thumps, grinds, etc.



May be helpful to have someone help you with this since they key is away from the engine.



Let us know the results from that, and we'll go from there.
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Old 05-28-2015, 04:45 PM   #25
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Just went back and re-read. Was the water in your bilge before or after that last time it ran good for one day?
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Old 05-28-2015, 04:59 PM   #26
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Thank you Kevlar7r and everybody else for helping me. I doubt there is water that would come out of the spark plug hole. a month ago when i had water in the boat, i let everything dry for a few days and took the boat out in the bay no issue. It started and ran fine for couple hours even at full throttle. i should have changed the oil right away but i didn't. All the cables connectors look clean but i need to go check to neg cable where it connects to the ground. I am guessing it is somewhere under the motor and probably has corrosion. Let me know if you disagree. Thanks again for all the help.
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Old 05-28-2015, 05:03 PM   #27
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I'm running on a theory here that you had a failure unrelated to the water in the bilge. Thinking perhaps your exhaust manifolds failed during that last trip. That's exactly what happened with mine. Had a great day, everything was fine. Next time I went to use it, it was hydrolocked and I destroyed it trying to start it. I changed batteries, charged them, jump started it... All the things your doing. And in doing so, destroyed the engine. What I've learned from that is, if the engine doesn't turn over right away, stop, go check oil. If water in oil, pull plugs and clean out the engine, then go looking for water source.



I would still pull the plugs and check. If no water comes out, awesome, and you've still removed compression, which will allow you to further diagnose your cranking issue.
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Old 05-28-2015, 05:07 PM   #28
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The water in the bilge was before it ran fine for one day. i just read your last post. Ouch!
I'll go work on it today and report back what i find.
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Old 05-28-2015, 05:13 PM   #29
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Quote:
Originally Posted by andre757 View Post
Milky. As soon as i get the motor to run i'll change the oil. Thank you for bringing it up

Wait so the oil is milky? This is a bad sign that water has gotten into it. This with the slow cranking means water is in at least one cylinder.

Pull the spark plugs to find out. Perform a compression test.

You are in need of engine work.
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Old 05-28-2015, 05:16 PM   #30
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ok thank you Mike.
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