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Muffler to hull insulator |
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gtxragtop 
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Joined: December-10-2011 Location: Worcester, MA Status: Offline Points: 28 |
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 Topic: Muffler to hull insulatorPosted: July-04-2016 at 6:49pm |
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My 96 gt40 ski nautique has the stock muffler. I noticed the other day that the muffler seems to be vibrating against the hull. I lifted the muffler slightly and some of the noise stopped. What material is used between the muffler and hull to reduce noise transmission? I wonder if mine is gone.
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1996 Ski Nautique GT40
Worcester, MA. |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: July-04-2016 at 9:24pm |
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Scrap carpet was always a choice from the factory! I'd suggest a closed cell Buna-N foam rubber about 1/4" thick and a density of around 14 lbs/cu. ft. McMaster has it.
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gtxragtop
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Posted: July-04-2016 at 11:37pm |
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Strips or mat? Have never pulled muffler so I don't know the muffler fits into the hull
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1996 Ski Nautique GT40
Worcester, MA. |
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Watauga
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Joined: June-12-2009 Location: United States Status: Offline Points: 208 |
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Posted: July-05-2016 at 12:47am |
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My Ski Nautique originally has carpet strips wrapped around them. During the rebuild I simply purchased blue foam from Lowes, found in the insulation department, and secured it with zip ties. Better than new.
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: July-05-2016 at 7:48am |
Dave, You should be able to see where the muffler is rubbing on the hull so that's where you want the cushioning. The area is probably small so strips of foam rubber will work. They are made with an adhesive backing but getting it to stick will require careful cleaning. I'd suggest a solvent wipe before applying the foam. |
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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: July-05-2016 at 9:33am |
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Those aren't the type of mufflers that they used on GT-40s.
Dave do you have the inverta-flow or hull hugger muffler? 96 ski I'm assuming an inverta-flow |
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gtxragtop
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Posted: July-05-2016 at 9:17pm |
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Stock rectangular muffler
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1996 Ski Nautique GT40
Worcester, MA. |
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gtxragtop wrote: