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Muffler Exhaust Tubes Leaking |
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TG3 
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Joined: May-29-2020 Location: Tyler, Texas Status: Offline Points: 106 |
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 Topic: Muffler Exhaust Tubes LeakingPosted: November-02-2020 at 8:37am |
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While doing some maintenance this weekend, I noticed water running out of my muffler exhaust tubes, just below the rubber hose that connects it to the manifold. Both sides had some water coming out, but the port side had more. It wasn't a lot of water, but a steady stream.
With closer inspection, it appears that both tubes have cracks in them. I attached a picture for your reference. You can see the water stream and the cracking if you look close. Looks to me like these exhaust tubes need to be replaced. Is that right? d  |
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1997 Air/Sport Nautique
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C_Heath
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Joined: January-21-2020 Location: NC Status: Offline Points: 207 |
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Posted: November-02-2020 at 2:36pm |
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Ive seen them patched with fiberglass or cat hair. Pretty easy to do.
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1979 Calipso Runabout (the boat that got it all started)
1988 Mastercraft ProStar 190 (sold) 2000 Pro Air Nautique/GT40 |
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MrMcD
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Joined: January-28-2014 Location: Folsom, CA Status: Offline Points: 3750 |
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Posted: November-03-2020 at 2:02am |
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Looks like they might have run dry, no water in the exhaust. They heat up really quick.
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Mpost
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Joined: July-05-2018 Location: Monticello, MN Status: Offline Points: 330 |
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Posted: November-03-2020 at 7:59am |
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I had a similar issue with my 98 SN a couple years ago after just buying it. Every one of the white streaks had a leak coming thru the fiberglass at the top of it. After removing the tubes they looked a lot worse inside than out. Also the hose was not in the best shape either. I opted for replacing them and all the hose. NP has the ones for your 97 for $85 .
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84 SN Sold 98 SN Lund Pro V 1975 Alumacraft
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TG3
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Joined: May-29-2020 Location: Tyler, Texas Status: Offline Points: 106 |
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Posted: November-03-2020 at 8:18am |
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I think I will replace them this winter along with the rubber connectors.
Anything else in the exhaust system I should inspect while I’m in there? |
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1997 Air/Sport Nautique
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gun-driver
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Joined: July-18-2008 Location: Pittsburgh, Pa Status: Offline Points: 4127 |
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Posted: November-03-2020 at 6:11pm |
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Been there done that I just fixed mine and replaced the blistered hose.
Under side of the muffler, they tend to rub on the bottom corners creating weak spots and eventually leaks. |
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TG3
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Joined: May-29-2020 Location: Tyler, Texas Status: Offline Points: 106 |
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Posted: November-06-2020 at 8:01pm |
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Great, I’ll check the bottom of the muffler while I’m in there.
Thanks!
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1997 Air/Sport Nautique
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Mpost
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Joined: July-05-2018 Location: Monticello, MN Status: Offline Points: 330 |
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Posted: November-07-2020 at 7:34am |
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When I had my muffler out the rubber padding on the floor had moved from its correct location and was not insulating the muffler from rubbing on the bilge. I cleaned it all up and reinstalled the rubber with 3M contact adhesive in the correct area. Also patched the worn areas on the muffler.
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84 SN Sold 98 SN Lund Pro V 1975 Alumacraft
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