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Old 08-26-2022, 12:10 AM   #1
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Question 2004 Maxum 1750 SR

Hello friends! Last season while on the lake my boat suddenly started to run really loud. Iíve had 3 guys look at it and they all thought the exhaust manifold was the issue. After trying a few things we decided to just replace it with a brand new one and it didnít change anything. Iím taking it into a place but they donít have availability until November. I would like to try and find it myself if possible. Does anyone have suggestions on how to search for an exhaust leak that isnít related to the manifold?
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Old 08-26-2022, 01:22 AM   #2
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Welcome aboard!

Knowing what engine you have would be helpful but Iím going to assume itís a Mercruiser 3.0. I would not have thought the manifold as the issue since itís water jacketed and you didnít mention any water leaking. I would suspect the exhaust pipe to the inner transom plate. Although if you have an exhaust bellows instead of the tube and the bellows tears the exhaust will be louder.
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Old 08-31-2022, 07:22 PM   #3
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You assume correctly! And there wasnít any water leaking. Do you have any recommendations how to check for leaks on exhaust pipe?
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Old 08-31-2022, 08:31 PM   #4
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Originally Posted by Dexs33 View Post
You assume correctly! And there wasnít any water leaking. Do you have any recommendations how to check for leaks on exhaust pipe?
If you are not accumulating water in the bilge I doubt the leak is inside the boat. I recommend you inspect the exhaust bellows on the outside.
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Old 08-31-2022, 08:55 PM   #5
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Thank you do much! Iíll keep you updated!
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