Leaky Transom

[GunnerJack07]

When I first bought my 1984 17' Bayliner Capri w/ AQ125A and Penta 270 outdrive and put it in the water a couple of weeks ago, I failed to check that the sea water impeller and water system was functioning correctly and suffered the consequence... I ended up getting my engine pretty hot and melting the rubber donut looking bellows that goes between the exhaust manifold and the hard pipe that exits the exhaust through the transom to the outdrive. When I replaced that rubber bellows (keep in mind that I'm new to owning a boat, but am very mechanically inclined as I've worked on jet engines professionally for the past 15 years), I pulled the corregated rubber exhaust tube from the outside of the transom that connects to the out drive (I noticed that it may require replacement because of the heat that it was subjected to), pulled the four bolts that hold the exhaust hard pipe that is on the inside of the transom, attempted to rotate that hard pipe out of the way but with little success, and then opted to rotate the exhaust manifold to put that rubber donut bellows in place. When that donut bellows was in place I re-installed and torqued the exhaust manifold and went down to the outside to put in those four bolts on that secure the exhaust hardpipe in place and noticed that the bolts didn't exactly line up, gave the pipe a little twist and they went in like a charm. I re-installed the corragated rubber hose back to the out drive, cleared the clog in my exhaust that caused the whole mess in the first place, changed the spark plugs and wires, coil, fuel filter, ran a compression check and timing check, checked the torques on all my manifolds and adjusted the carberater... All ran flawless... I put my boat back into the lake and did some fishing for a few hours and then pulled the boat out of the water to head home but noticed at that point that the boat was having a difficult time planing out and handled a little differently... When I got the boat out of the water, I pulled the plug and then realized why it wouldn't plane... It was full of water, A LOT OF WATER!!! Yesterday I was trying to find the source of my leak, so I tilted the boat so that when I turned the water hose loose on the inside I could pin point the leak and it didn't leak from the inside out. I then put the drive in a bucket of water and ran the engine to see if my engine was leaking and found that it was NOT. BUT, I did notice a lot of water leaking at that corrugated exhaust bellows on the outside of the transom that connects into the out drive or possibly from around those four bolts that didn't line up from earlier in this post. I was thinking of putting some silicone around that area of the transom to see if that slows or eliminates this issue, but can't figure out how so much water got on the inside of the boat. Anybody have some insight or experienced anything similar???

http://http://www.dougrussell.com/p...,1880,1881,1882,1866,1887,1870,1886,1875,1877
http://www.dougrussell.com/partscat...,1880,1881,1882,1866,1887,1870,1886,1875,1877
Part 76 was replaced, part 22 was rotated with removal of the four bolts (this diagram is from a AQ125B, I have a 125A), and part 24 could used replacement.

 

[Don S]

Re: Leaky Transom

When you rotated part 22, you lost the seal created by orings 21 and 23.
Thus allowing water to get into the boat.
Only thing you can do is pull the pipe and install new orings. They also get corrosion on that surface that won't allow a seal.