Sound Deadening Project - 2011 242

[jdmackes]

I know this is a bit of an old thread, but I'm looking into doing some sound deadening on my Polaris LE2100. I've read to use MLV; which spray adhesive would be best for that? I had seen some people talking about one used with a caulk gun but if I could use a spray adhesive I think it would be much easier. After that though, what else should I use to help deaden the sound of the engine?

 

[Nightmare]

I'm not sure. The foam fell off again after I applied a bunch more of the Gorilla Glue spray. I can't seem to get the "good stuff" in California. The 3M 90 is unavailable to ship to California. I also haven't had a chance to take new sound readings with the foam and Kilmat in place. I can say that it does seem quieter, but even with new DB Meter readings, I'm not sure I can quantify it.

 

[granpachuck]

I know this is a bit of an old thread, but I'm looking into doing some sound deadening on my Polaris LE2100. I've read to use MLV; which spray adhesive would be best for that? I had seen some people talking about one used with a caulk gun but if I could use a spray adhesive I think it would be much easier. After that though, what else should I use to help deaden the sound of the engine?

Loctite 1629134 2267077 Adhesive-Caulk, Single


I think the reason most spray adhesives give up after some time, is the heat in the engine compartment. I used this stuff, and it is heat resistant. None of foam padding I installed has come loose, and I used the kilmat first also.

 

[jdmackes]

Should I use MLV and then foam padding as well? Is the padding to help absorb some of the noise?

 

[RobbieO]

I'm not sure. The foam fell off again after I applied a bunch more of the Gorilla Glue spray. I can't seem to get the "good stuff" in California. The 3M 90 is unavailable to ship to California. I also haven't had a chance to take new sound readings with the foam and Kilmat in place. I can say that it does seem quieter, but even with new DB Meter readings, I'm not sure I can quantify it.

3M trim adhesive works awesome. Spray the mounting surface first and let it cure. Then spray on the foam side and attach.

 

[FSH 210 Sport]

3M trim adhesive works awesome. Spray the mounting surface first and let it cure. Then spray on the foam side and attach.

3M 77 is the stuff…

 

[FSH 210 Sport]

For those wanting to check sound levels there is at least one app available to just down load to your smart phone. I used it on my boat this past year checking sound levels when experimenting with different impellers. Just be sure and put it in the same place each time you take readings.

 

[Nightmare]

I guess we can’t get the 3M 90 in California any more. I have an old bottle of 77, but the spray nozzle is clogged and I couldn’t find another one that fits.
I have an iPhone app and a $30 db Meter from Amazon. I never got around to the second set of measurements

 

[FSH 210 Sport]

I guess we can’t get the 3M 90 in California any more. I have an old bottle of 77, but the spray nozzle is clogged and I couldn’t find another one that fits.
I have an iPhone app and a $30 db Meter from Amazon. I never got around to the second set of measurements

One of the things you quickly learn when you move out of state is that all sorts of things are available to you that ca no longer allows.

Well there is always time to test the db readings once you get back out there. I will tell you that in my experimentation with different Impellers that the perceived sound can be halved with impellers such as Skat Traks. Each 3 DB is a doubling of perceived sound, so if you get 3 DB of reduction you have accomplished a lot.

 

[RobbieO]

3M 77 is the stuff…

This is the stick…

 

[BlkGS]

A little sound proofing theory time...

In a car, which I will assume will be similar to a boat, you use MLV to block sound. Typically you're trying to prevent migration of noise from one area to another (example, tires to inside the cabin, or engine bay to the rest of the boat). A foam would be used more for absorbtion, to try to reduce rattles, things like that. In a home or studio, foam is used to cut own on reflections.

All that to say, I think mass loaded vinyl is the solution for something like this over foam squares. While I'm sure they help, I think MLV would work better, especially when applied with a CLD product.

 

[Manny252]

Hey guys, Wrapping the mufflers, cover and compartment is the answer for sound proofing. ,,,, took my boat out yesterday and what a difference , sound is just like having a outboard now ,,, also Jeff"s cobra's fins did the trick, I can finally leave my hands off the steering wheel once in a while while cruising the Fl no wake channels ! Thank you Jeff for a great product ! No more wrestling this jet boat...

 

[kgower]

Bought my box of Kilmat but haven't had the opportunity to install. hoping good results.

 

[TX_Mercenary]

Hey guys, Wrapping the mufflers, cover and compartment is the answer for sound proofing. ,,,, took my boat out yesterday and what a difference , sound is just like having a outboard now ,,, also Jeff"s cobra's fins did the trick, I can finally leave my hands off the steering wheel once in a while while cruising the Fl channels ! Thank you Jeff for a great product ! No more wrestling this jet boat...

got any pics? and could you throw in some details (i.e. processes, materials, etc...) how you wrapped the mufller, cover and compartment to be sound proof?

 

[1BadTundra]

Hey guys, Wrapping the mufflers, cover and compartment is the answer for sound proofing. ,,,, took my boat out yesterday and what a difference , sound is just like having a outboard now ,,, also Jeff"s cobra's fins did the trick, I can finally leave my hands off the steering wheel once in a while while cruising the Fl channels ! Thank you Jeff for a great product ! No more wrestling this jet boat...

Is that safe to wrap mufflers with deadener? Did you use a heat rated deadener or do they not get hot enough?

 

[Manny252]

Is that safe to wrap mufflers with deadener? Did you use a heat rated deadener or do they not get hot enough?

Mufflers are cooled with the sea water , and seem fine with the wrap .

 

[RobbieO]

Here's an alternative to consider, we use one when anchored to extend our bimini from time to time. Naturally it's not recommended for use above slow speeds; Anchorshade III | Taylor Made

I was going to purchase this, but too many bad reviews. Sounds like the quality has been bad.

 

[CarolinaJet]

Mufflers are cooled with the sea water , and seem fine with the wrap .

what did you wrap them with?

 

[Manny252]

what did you wrap them with?

Any self stick insulation wrap you see on line , or even the self stick duct wrap they sell at Lowes/Home Depot.

 

[JASmith]

Hey guys, Wrapping the mufflers, cover and compartment is the answer for sound proofing. ,,,, took my boat out yesterday and what a difference , sound is just like having a outboard now ,,, also Jeff"s cobra's fins did the trick, I can finally leave my hands off the steering wheel once in a while while cruising the Fl no wake channels ! Thank you Jeff for a great product ! No more wrestling this jet boat...

It's been a while since you posted this, how is it holding up? I am very tempted to get cracking on this, the noise is the #1 complaint on my boat and I'll do just about anything to limit it.

Thanks!