Motor Box Insulating Foam disintegrating

[dchristman]

Anyone have tips on how to deal with this? It's falling off in chunks and crumbling into the bilge.

[Kelvin]

I recently used a shop-vac to completely remove the foam. Now I'm looking for something to put back in its place. Any thoughts?

[Jordan]

This stuff....

 

https://www.westmarine.com/buy/west-marine--noise-control-barrier-material--P006_180_006_004?recordNum=1

 

[skihart]

I did the motor box on my 2004 MCtt a few years ago with this. Or one of these anyhow from McMaster Carr. Self adhesive and worked well. Sold the boat soon after but it seemed perfect and much quieter.

 

https://www.mcmaster.com/#sound-control-insulation/=1ca3toc

[Andre]

Good thread about it on MC team talk.

[BraceMaker]

Wire cup wheel on an angle grinder will get it all off really fast if it is flaky, but youll need two people to haul the motor box lid off the boat.

 

 

[braindamage]

From Themalibucrew

http://www.themalibucrew.com/index.php?/articles.html/motorbox-insulation-r4/

 

One of the best mods I’ve done to mine.

[dchristman]

@braindamage I get "you do not have permission to view this page".

[braindamage]

Pm’s Sent

[Bdecker]

Old thread I know, but my patch job on our 2016 CarbonPro didn’t hold up this season. Just winterized the boat and I’m looking to get the “doghouse” back in shape. I bought a kit last year from discount inboard marine and it really didn’t last (probably installation error…). Is there a secret to the surface prep that I missed?

[Zman]

I removed the foam under my box this summer. There was no noticeable change in noise. So I left the inside of the box clean and bare.

Keep in mind that most (all?) engine boxes today have thicker and denser foam under the vinyl on the outside of the box.

If I felt I had to do something, I would use the type of carpet my 2007 Malibu RLxi had from the factory. Light density foam is never going to hold up. Don't waste your time installing that.