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Old 12-18-2016, 05:44 PM   #1
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Exhaust Silencer

During the parade last night the CO2 alarms went off. Went into engine room and found that port exhaust silencer, muffler, split at the seams, letting water and exhaust into the boat, made of rubber. Took 4 vise grips closed seam and back on the way. My question is " is there a product that I can glue or seal the seam back together with and save the $400. Was thinking of 5200 or is there something else that I can inject into the seam that will hold. I know it is the exhaust and not anything to play around with.
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Old 12-18-2016, 07:21 PM   #2
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If you cant afford it....

try fiberglass with epoxy.
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Old 12-18-2016, 07:29 PM   #3
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Exhaust system is pretty important stuff. I mean you risk filling the boat with water and exhaust. $400 is an absolute bargain if that is all it will take to fix it.
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Old 12-18-2016, 07:50 PM   #4
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You have CO2 sensors? Do they go off when a lot of soft drinks are opened at the same time? :P

No seriously, that is awesome your alarms did their job.
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Old 12-18-2016, 09:24 PM   #5
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A crack in my lift muffler fitting allowed water to start leaking.
Have a fiberglass expert fix it. Remove it from the boat and do the repair. Mine was $1,800 and I was OK with that.
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Old 12-19-2016, 06:45 AM   #6
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If your muffler is made of GRP, then repairs using good glassing techniques and epoxy resin are a definitely on the cards. If it is really made of rubber and you are looking for a "goop" to squeeze into the cracks then I would think twice. The edges are obviously trying to separate if it takes G-clamps to close, so the goop would be in tension (not good). Also it will be hard to get the edges clean before applying. I have no experience of plastic welding - might be worth exploring. Do you know the name of the manufacturer?
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Old 12-19-2016, 07:39 AM   #7
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Quote:
Originally Posted by kartracer View Post
During the parade last night the CO2 alarms went off. Went into engine room and found that port exhaust silencer, muffler, split at the seams, letting water and exhaust into the boat, made of rubber. Took 4 vise grips closed seam and back on the way. My question is " is there a product that I can glue or seal the seam back together with and save the $400. Was thinking of 5200 or is there something else that I can inject into the seam that will hold. I know it is the exhaust and not anything to play around with.
Is it the silencer or a coupling sleeve?
Regardless, it is impossible to satisfactorily bond old rubber together (if it is rubber) with any adhesive in such an application. Requires heat and pressure to vulcanize the joint.
Super glue manages to bond o rings but its not suitable for this
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Old 12-19-2016, 08:04 AM   #8
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Going to take it off today and then bring it into the industrial supply area in town and ask around as to what if anything can be done.
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Old 12-19-2016, 12:20 PM   #9
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I'd rather pay $400 than have to swim home.
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Old 12-20-2016, 06:58 AM   #10
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I'd rather pay $400 than have to swim home.
Agreed, but IMHO making a good quality repair yourself for next to nothing is beyond price.
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Old 12-21-2016, 09:58 PM   #11
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I'm impressed. Four visegrips on the ready.
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Old 12-21-2016, 10:06 PM   #12
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4 boat dollar spend on a 45' boat pftttt Cant get a good bottle of red wine for that
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Old 12-21-2016, 11:02 PM   #13
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I agree. I only have two on hand myself. Never thought I'd need four at once, never did before. We only have three bottles of wine on hand. I guess I'm not well prepared in all departments. And I also agree, you can't get a good bottle of wine for four dollars. Oh, you said boat dollars.
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Old 12-24-2016, 03:11 PM   #14
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Not my boat.
Some rubber mufflers are two pieces, halves, glued together at a longitudinal flange.
I've seen one split when a pile of woods chips plugged the exhaust.
Used two pieces of aluminum, one on each side of the flange and then through bolted, #10-24 machine screws, at close spacing. Went some distance beyond the apparent split ends to be sure the split was covered.
As far as I know that repair lasted some years. I don't know the new owners so cannot ask if the muffler was repaired or replaced.
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Old 12-24-2016, 07:45 PM   #15
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C lectric just what we did, if vise grips held it together this should also work. Thanks
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Old 12-25-2016, 12:28 AM   #16
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There just might be a reason the thing split open, I would do some investigation to make sure there isn't a blockage in exhaust or water intake lines.
Would think that it got pretty hot in there to open it up!
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Old 12-27-2016, 04:49 PM   #17
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If you do decide to epoxy it back together keep in mind that "ordinary" epoxy starts to creep at 140 degrees. A muffler could see more than that so go with some epoxy that is rated at higher temps.

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Old 12-27-2016, 05:03 PM   #18
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I don't know. Something as important as exhaust in the cabin isn't anything I would mess with leaking. It could kill you and your crew! Kinda like putting a Honda generator on the fly bridge or the swim platform.

Less than $300 at WM.

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Old 12-27-2016, 10:36 PM   #19
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[QUOTE=Alaskan Sea-Duction;507829]I don't know. Something as important as exhaust in the cabin isn't anything I would mess with leaking. It could kill you and your crew! Kinda like putting a Honda generator on the fly bridge or the swim platform

I agree, this is not something you want to have as a recurring problem!
I would look for a quality fiberglass muffler to replace the rubber unit.

As for the generator on the flybridge or swim step, wouldn't the exhaust be going the same place as a built in, onboard unit?
Overboard or overhead is normal in the industry, don't know of any better solution.
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Old 01-03-2017, 02:28 PM   #20
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Good. I have actually seen folks place portables "inside" their enclosed flybridge or cockpit.
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