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1988 exhaust question |
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lonestar 
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Joined: August-17-2008 Location: Lafayette N.J. Status: Offline Points: 290 |
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 Topic: 1988 exhaust questionPosted: March-25-2023 at 4:07pm |
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I have a completely stock 1988 SN and the exhaust hoses are tired . When I replace them can I omit the mufflers and run the three inch hose from the manifold all the way to the through hull for the flapper ?
Thanks . |
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lonestar
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Jonny Quest
Grand Poobah 
Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 3032 |
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Posted: March-25-2023 at 4:54pm |
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Many have done just that. Be prepared for a louder boating experience.
JQ
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Current
2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
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gibson1525
Groupie 
Joined: November-01-2011 Location: Lake Lanier, GA Status: Offline Points: 85 |
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Posted: March-31-2023 at 11:20am |
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I’d love to hear a before and after video after you’re done
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1988 SN 2001
2004 216 |
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63 Skier
Grand Poobah
Joined: October-06-2006 Location: Concord, NH Status: Offline Points: 4293 |
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Posted: April-02-2023 at 10:33am |
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Definitely louder. You'll enjoy the rumble at the dock, and in general these boats just sound great. My only comment is that while it's louder in the boat at speed, sometimes the place it's really louder is on shore. So if you are 6 am skiers on a shoreline you might get a few comments. Not that it's like those mufflers silence the boat, but they certainly take the edge off.
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'63 American Skier - '98 Sport Nautique
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lonestar
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Joined: August-17-2008 Location: Lafayette N.J. Status: Offline Points: 290 |
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Posted: April-03-2023 at 8:21am |
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So are we talking obnoxiously loud here ? I had two concerns, I wasn’t sure if there would be some kind of back flow issue . And would removing the mufflers require me to teak anything with the motor since I kinda have it set right where I need it right now .
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lonestar
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lonestar
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Joined: August-17-2008 Location: Lafayette N.J. Status: Offline Points: 290 |
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Posted: April-03-2023 at 8:22am |
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I’d be happy to for sure
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lonestar
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TRBenj
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Joined: June-29-2005 Location: NWCT Status: Offline Points: 21213 |
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Posted: April-03-2023 at 12:03pm |
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You won’t notice much tone difference, and the volume from the drivers seat won’t change much either. It’ll be a little louder from the rear seat. The biggest difference will be from shore, where it will be significantly louder- the older style mufflers seem to knock down how far the sound travels more than anything.
Considering the cost of 3” corrugated exhaust hose, I wouldn’t recommend it from a cost standpoint. |
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lonestar
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Joined: August-17-2008 Location: Lafayette N.J. Status: Offline Points: 290 |
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Posted: April-03-2023 at 2:22pm |
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Interesting.
And yeah that’s a fair point , probably $400 in hose |
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lonestar
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1980SN2001
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Joined: August-01-2022 Location: Rocklin, CA Status: Offline Points: 109 |
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Posted: April-06-2023 at 3:37pm |
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Has anyone ever used Schedule 40 or 80 PVC pipe? Its light, cheap(er), and very durable. My exhaust hoses are 3" ID and 2.5" PVC has an OD of 2.875 which I would imagine would be close enough.
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1980 SN Project
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63 Skier
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Joined: October-06-2006 Location: Concord, NH Status: Offline Points: 4293 |
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Posted: April-06-2023 at 3:48pm |
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Not that I'm aware of. PVC pipe turns into spaghetti with hot water flowing through it, even sch 80. Hot water capable versions might fare better but I don't see them surviving hot exhaust/water temps.
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'63 American Skier - '98 Sport Nautique
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1980SN2001
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Joined: August-01-2022 Location: Rocklin, CA Status: Offline Points: 109 |
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Posted: April-06-2023 at 5:39pm |
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Thats true, I wasn't sure how hot the exhaust temperatures/water are once they reach that part of the exhuast but it wouldn't be worth trying if there was any chance of them softening up and possibly letting water into the boat at the hose clamps.
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1980 SN Project
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NeilMcG
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Joined: September-20-2021 Location: Pittsburgh, PA Status: Offline Points: 230 |
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Posted: April-06-2023 at 6:13pm |
I had a old nautique without mufflers, and It did sound mean. The sound level is substantial without them. Got countless questions on what engine mods were made; I think most didn't realize it was only the mufflers. It really was cool for awhile, but soon became a irritant. Passengers didn't like it; they couldnt hear each other, it interfered with skiing and it disturbed residents along the shore. Not trying to sway you either way, I'm only sharing my experience. 'Course then, maybe I'm just getting too old.😀 |
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67 ski nat
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Joined: July-19-2018 Location: Santa rosa Status: Offline Points: 1199 |
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Posted: April-06-2023 at 10:40pm |
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Believe you want SHIELds brand marine wet exhaust hose with wire
Super thick tough Blue strip |
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lonestar
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Joined: August-17-2008 Location: Lafayette N.J. Status: Offline Points: 290 |
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Posted: April-07-2023 at 7:10am |
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Thanks , that’s kinda what I was thinking, It would be fun for a little while and then annoying.
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lonestar
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lonestar wrote: