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Old 09-24-2015, 08:46 AM   #1
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Pinkish cooling water

After about 2 hours of low power running (1200rpm) our American tug 34's raw water cooling developed a pinkish tinge. Fuel or coolant??? Remedies??
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Old 09-24-2015, 08:49 AM   #2
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More details please.

Where are you seeing this pink water?
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Old 09-24-2015, 09:23 AM   #3
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if fuel there should be a sheen on the water once it settles down what color is your coolant??
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Old 09-24-2015, 11:03 AM   #4
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Most likely coolant, if your boat uses coolant; The only way I can think of fuel getting in there is if you have a fuel cooler. My advice is to stop using the boat until you fix this.
There is a likely heat exchanger dying somewhere. Have you checked your coolant levels? have you checked the color of the coolant in the tank?
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Old 09-24-2015, 11:16 AM   #5
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Well he claims it his RAW cooling water. So I'd like to know how and where he is even able to see it.
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Old 09-24-2015, 11:57 AM   #6
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Rust in the system?
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Old 09-25-2015, 11:13 AM   #7
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Trans cooler failure maybe if yours use ATF.


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Old 09-25-2015, 01:48 PM   #8
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Thanks for the idea. The American Tug sends some of the raw water cooling out the side of the boats. We plan to service the engine shortly and will address this..
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Old 09-25-2015, 02:10 PM   #9
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I had a heat exchanger tube fail on our boat about a year ago mixing the raw water with the coolant. I couldn't see any color in the raw water as it was way too diluted. What I could see was that my overflow tanks filled up with salt water.
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Old 09-25-2015, 04:10 PM   #10
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Quote:
Originally Posted by River Cruiser View Post
Trans cooler failure maybe if yours use ATF.


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Besides the fact that oil and water don't mix, I would think it would take a lot of ATF to even remotely turn raw water pink. So much in fact your tranny would stop working pretty quickly after the leak first started.

Plus if it was fuel or ATF in that kind of volume you're going to see a pretty good size slick around or behind the boat.
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