Engine hatch/compartment sound insulation suggestions

Trashman

Has anyone removed the egg crate type hatch insulation and replaced with a different material or even added any more to reduce noise? 
Im contemplating removing and replacing mine. I feel the noise level could be reduced somehow. Specifically im looking at this soundown insulation  but unsure what could be used safely   **my boat is a 270 fiesta with 350 mag

rasbury

Is it that noisy? mine is quiet at idle low speed...running another story but assume that more exhaust and not from the engine compartment....

Trashman

Well, it's loud at cruise speed. im fine with it at idle but why not improve the sound surpression?
I have to think there would be something better than whats under the hatch. Im assuming also when I install carpet, that too will improve the sound quality.   On my old bayliner I sprayed fire retardant foam inside the fiberglass engine box and what an improvement. Im not looking to do that to my rinker but there has to be something I can install. 

Handymans342

There is a foil faced insulation you can buy and glue in place. Thats what I have

Trashman

handy, what about heat retention? looked at the foil faced but that and thickness was was my concern. was there noise reduction with this type?

Handymans342

It was factory installed. No heat problems and when the hatch is closed you don't even know I have diesels

Dream_Inn

They are typically noise reduction.  I had a new one installed on my boat several years ago and it was sound dampening.  You need to make sure it is appropriate though for the engine room.

Cableguy Greg

Are you sure it isn't exhaust noise rather than engine room noise? Or is it a combo of both? Defender has some products. Here is another company that has some as well.

http://www.megasorber.com/soundproofing-solutions/marine.html

99270fv

i just replaced mine with the padded shop flooring that snaps together. screwed it to the underside of the engine hatch.

Trashman

I saw that material,cable.   Im guessing thats high dollar for sure.   Found some material similar to what handy and dream described.   But still looking for input. 

Handymans342

What input do You need? Just install it

Trashman

Lol, I guess your right handy. I just hate to rip it out if someone had a better idea. ...I did that with all my blower vent hose. Sounds simple but i had a few hrs in that as a contortionist! The stuff you and dream suggested looks the best.

Trashman

Lol, I guess your right handy. I just hate to rip it out if someone had a better idea. ...I did that with all my blower vent hose. Sounds simple but i had a few hrs in that as a contortionist! The stuff you and dream suggested looks the best.