Exhaust options?

[Blowncar]

My stainless steel exhaust tubing is showing some wear, i have a few weeps. This is the 4' tube that runs out the engine room through the back bulkhead. Of course this is after the shower head so it shouldn't be too warm.

I doubt pulling it out and doing a patch or 2 at a time is the best way to go forward; so i'd prefer to replace. A sheet of 316 stainless (not sure of thickness) is $$$. I've been told fabricating a fiberglass tube is a good option. Also can the existing tube be fiberglassed inside and out to seal it up?

Looking for ideas, thanks.

 

[Blowncar]

pictures

 

[SEVEN]

Mine has been changed out to fiberglass and it is fabulous.

 

[JuiceClark]

Mine has been changed out to fiberglass and it is fabulous.

Mine too. This one came with a new fiberglass exhaust installed in 2014 and it's really primo. I haven't even burned myself in the ER once!

 

[JuiceClark]

 

[Cricket]

Replace it with fiberglass, we're trying to get as much metal that interacts with salt water out of the boat as possible when we do repairs or upgrades.

 

[Blowncar]

Nice pic, any chance that's been fiberglassed over the original stainless tube?

 

[Cricket]

Nice pic, any chance that's been fiberglassed over the original stainless tube?

Why would you fiberglass over a SS tube that's been compromised from electrolysis?
Epoxy doesn't really adhere to SS very well to begin with and by the time you did a proper grinding job on the tube I doubt there would be much left to glue to.
And how would you handle the ends where the hose attaches as the diameter is going to be much larger?

A quick fix for a emergency repair, sure take a couple of wraps with some miracle waterproof epoxy patch, I get that.
Another quick emergency repair method would be to either sleeve or band the tube with hose and clamps.

Reminds me of a save your ass repair from about 45 years ago.
Was fishing on a fiberglass 48' Pacemaker in one of the canyons off NJ, somebody noticed there was a lot of water in the bilge. Turns out none of the pumps were working or maybe they were clogged. Anyway we get the water level down with one of the engines but there's obviously a pretty bad leak.
The exhaust tubes were all hose, except for the mufflers, the supports had worn thru the hose in a couple of spots on both sides of the boat.
We took coffee cans, removed the bottoms, flattened them out, screwed multiple hose clamps together so they would fit the hose diameter, robbed a few double clamped spots and patched it up. Stopped almost all of the leaks.
Luckily the owner was a coffee nut and had a bunch of both empty and full cans to use.
Crazy what you can come up with in a pinch

 

[JuiceClark]

Nice pic, any chance that's been fiberglassed over the original stainless tube?

No chance.

I was surprised to what degree all those huge clamps were too loose. It wouldn't have occurred to check them until one was dripping pretty badly. Apparently, they all need tightening every half-decade or so.

 

[SEVEN]

I go through both motors and any hose connection once a year and re-tighten everything. It loosens up with the vibrations.

 

[Blowncar]

thanks, getting a quote on new fiberglass tubes