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[Rodwilson@mail.com]

Exhaust pics

20210318_144325 ,20210318_144339, 20210318_144449,

[km1125]

The actual flange has the pin holes? I've not seen that before, but I guess any metal can have issues.

Is this what you have? (or something similar?)

exhaust_flange.jpg

That pic I just got off Amazon. Just searched for "stainless exhaust flange". That particular one is about $200

[bud37]

If it were mine on the next haul I would remove those fittings ( both sides ) and inspect what is going on there.....the reason, what concerns me from the pic is the brown tinged seepage stains. If water has gotten behind there it could be in the transom core and since replacement is in order anyway a good idea might be to have a real good check of those areas....probably not what you wanted to hear but that is my opinion from what I see.

[km1125]

Source of the post If it were mine on the next haul I would remove those fittings ( both sides ) and inspect what is going on there.....the reason, what concerns me from the pic is the brown tinged seepage stains. If water has gotten behind there it could be in the transom core and since replacement is in order anyway a good idea might be to have a real good check of those areas....probably not what you wanted to hear but that is my opinion from what I see.

Is there hull coring in a 3697? My same year 3607 didn't have any below the rub rail.

[km1125]

Source of the post

Source of the post If it were mine on the next haul I would remove those fittings ( both sides ) and inspect what is going on there.....the reason, what concerns me from the pic is the brown tinged seepage stains. If water has gotten behind there it could be in the transom core and since replacement is in order anyway a good idea might be to have a real good check of those areas....probably not what you wanted to hear but that is my opinion from what I see.

Is there hull coring in a 3697? My same year 3607 didn't have any below the rub rail.

I think it's interesting that the area just around the thru-hull looks like it was spray painted well after construction but before the leaks. Was that a previous owner? Wonder why they just sprayed that part and not the rest of the area of the bilge there?

[bud37]

Source of the post Is there hull coring in a 3697? My same year 3607 didn't have any below the rub rail.

I don't know what is in there......maybe the models are not all the same......like I said, the staining is what concerns me from a visual. Maybe just brackish water or rust , who knows. My guess about the paint could be some of the magic in a can ( you know what I mean ) and the only correct way to repair those fittings if in fact they have pinholes is to replace them. Even if the transom is solid glass layup you still don't want water to get to the glass fibres behind the gel.
Easily checked while changing the fittings.

Viper is good with glass, maybe he will chime in.

[Viper]

Hard to say what's going on there from the pic. Could be a rotting core if applicable, could be the flange is toast or maybe the fasteners aren't stainless steel. Either way, it's leaking through the transom and the only way to fix it properly is to remove and re-bed it or a new one. While it's out would be the time to inspect the transom and deal with any damage that might exist. Hopefully the transom on this model this model isn't cored.

I too thought the white paint was strange. At first I thought it was a glass repair but I don't see any signs of that so I can't figure out why it was spray painted. I'd be curious to find out if it's that rubber spray stuff you see advertised on TV for waterproofing that they might have tried for stopping a leak. If it feels rubbery, I'd be willing to bet that's what it is.

[Cooler]

In my humble opinion, looks like it is rust stains coming from the fasteners of the flange. I assume this boat has been in salt water, so that would contribute to the non-stainless fasteners corroding and staining very quickly. Someone may have thought spraying that rubberized coating would stop the leaking rust. The 3607 and 3697 are the same hull. No coring in the hull below waterline. If you replace the flange, check to see if there is a flapper in the section being replaced. The flapper may be there or somewhere closer to the engine to prevent backwash from flowing into the engine via the exhaust. I would guess if it were the flange that was compromised, there would be a less defined stain stream there. No matter what, have a good marine guy get that sealed up if it still leaking. Good luck! er