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Mariner 350 Exhaust leak
- SanJuanDreamer
- First Mate
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Mariner 350 Exhaust leak
Where the exhaust matches to the hull, there are 5 though-hull nut and bolts connecting the seal to the hull.
It seems a screws at the bottom are leaking.
Just wondering if any of you ran in to this issue and what did you do?
Plan A is remove the bottom screws.
Find a way to gently lift the rubber seal from the hull and squirt 5200 between the hull and exhaust seal, then replace screws.
Plan B disconnect the exhaust seal from the muffler, then remove the muffler.
Remove the exhaust seal from the hull.
Remove all that 5200 and clean up area and reset it.
If you have a Mariner 350, you know there is barley room in the engine compartment, removing the exhaust seal without removing the muffler can lead to a problem if it doesn’t go as plan.
- mjk1040
- Admiral
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- Vessel Info: 1998 355 AC/MY "Deja Vu"
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Re: Mariner 350 Exhaust leak
I'd Rather Be Boating!
1989 Sea Ray Seville
1986 Carver Mariner 32'
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
1980's Thompson 19' Open Bow
- feeez
- Commander
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- Joined: May 14th, 2014, 6:32 am
- Vessel Info: 2001 350 Mariner
- Location: Beacon Bay Penetanguishine Ontario
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Re: Mariner 350 Exhaust leak
Thanks and Cheers
Fraser
- SanJuanDreamer
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Re: Mariner 350 Exhaust leak
Remove the 5 screws, remove as much 5200 as possible and use a jack to push the muffle towards the exhaust outlet.
This setup should push the exhaust outlet out from the hull just enough to get access to the repair area.
- bud37
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Re: Mariner 350 Exhaust leak
- bud37
- Admiral
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Re: Mariner 350 Exhaust leak
- SanJuanDreamer
- First Mate
- Posts: 170
- Joined: April 4th, 2016, 4:02 pm
- Vessel Info: Still Searching
- Location: Seattle
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Re: Mariner 350 Exhaust leak
I know some good boat mechanics, I'm going to send pictures with an explanation this coming Sunday, see where it goes from there...
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- Scurvy Dog
- Posts: 46
- Joined: July 29th, 2015, 9:03 am
- Vessel Info: 1998 Carver 350 Mariner
- Location: St. Joseph, Michigan
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Re: Mariner 350 Exhaust leak
Our boats are coming on 20 years old. During this time, mechanical systems become "comfortable" with their configuration. My concern about your Plan C is that the jacking to move the exhaust, while it may work as you want, could cause undue stress somewhere else in the system creating a new problem. Therefore, I'd consider as a last resort.
Your Plans A and B are basically the same but instead of working on a single screw, your are maintaining all of them. Back to my first statement, there is not a lot of room to work in. Additionally, the amount of water that passes through the exhaust is more of a stream where the lower screws are most exposed to the effects of the water and more likely to leak. Considering the working space and the likelihood that only the lower screws may have a problem, I'd be inclined to make repairs to those that are and likely to leak ... Plan A.
I'd definitely check the other side for signs of seeping or leaking and make similar repairs. Next weekend I'm tackling our starboard rudder stuffing box as it was leaking this past Summer. While the port box was dry, I'm replacing the flax also.
Let us know how the job goes!
Tony
- SanJuanDreamer
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Re: Mariner 350 Exhaust leak
- bud37
- Admiral
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Re: Mariner 350 Exhaust leak
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