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Joe, Marine Mechanic
Category: Boat
Satisfied Customers: 7251
Experience:  ASE, electronics, Marine mechanical and electronics, pwc, wiring, all around repair tech,
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I have 2005 Yamaha 150 Four Strokes. One of the motors has

Customer Question

I have 2005 Yamaha 150 Four Strokes. One of the motors has water coming from exhaust below cowl.. noticed it about 2 weeks ago. At the time, water was still coming through pee hole. Now, no water through pee hole.. just exhaust. I had already planned to change waterpumps, but not sure why water coming through exhaust port? What else should I check? I checked pressure relief valve and it seemed to be working properly.
Submitted: 1 year ago.
Category: Boat
Expert:  Joe replied 1 year ago.


Thank you for allowing me to assist you, my name is Joe and I will be happy to assist you with your concern today.

On marine engines the exhaust is raw water cooled and thus it is normal for water to come from the exhaust, I can only assume that you are possibly then saying there is water coming from an exhaust area that should not, this then suggesting that there is a leak be it damage such as a crack or a failed gasket(s). At this point you would need to access where the water is coming from to diagnose the leak, once that is done and it is known where the leak is coming from then repairs can be made. Otherwise there is no real way for me to know what is leaking nor an engine model number to reference.

Thank you!
- Joe

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