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Need help....possible Y-pipe leak?

Jtimberlake83

New member
I have a 91 Mariah 2000z. 350 with Alpha 1 Gen 2 outdrive. Replaced all bellows and gimble this winter. However...I am still getting water in my bilge at the end of the day. Roughly 2-3 gallons after 5-6 hours on the water. I have tried to locate the leak, and from the best that I can see, there is a 12 pt bolt head that is shown below the drive shaft. I can see water gathering below that bolt on the flat surface (I’m assuming this is the y-pipe).
In an attempt to find the leak, I filled the bilge with water and parked on a steep hill. Water began to trickle out of the 2 small exhaust ports on each side of the transom assembly. Water did not come from anywhere else....
The leak never affects our days on the lake, but it is just very aggravating to me, and I want to fix it. Thanks in advance.
Any suggestions, advice, or potential causes of the leak?
 
Sounds like the y pipe is corroded or worn through which can happen if a exhaust shutter drops down the y pipe. Any fix here requires pulling the drive and then engine for access.
 
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