1990 25 hp Acoustic Foam Crumbing-alternative?

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  • August 4, 2016 at 10:34 am #4919
    outboardnut
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      The soundproofing foam on the inside my hood is disintegrating and making a mess inside the hood.
      So I ripped it out and what’s left is the adhesive that was used to secure the foam.
      Do you have any suggestions in regards re sound proofing the cowl?
      If the suggestion is a spray .Would I be able to spray over the old adhesive?
      Or is some kind of foam material the way to go?

      August 4, 2016 at 1:35 pm #41580
      outboardnut
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        I figured out that acetone gets off the adhesive

        August 4, 2016 at 4:05 pm #41582
        dougs-outboards
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          I think a 1/2" to 1" thick foam rubber might work well if you can find some somewhere. Maybe some spray-on adhesive or rubber adhesive of some kind to bind it inside your hood, after you pre-make the foam inserts. Then I was thinking about some spray on sealer type spray over the foam rubber that hardens so that when the foam gets old it won’t start deteriorating and sucking down your carb or making a mess inside the cowl and pan. I hate it when the stuff gets all over everything in there.

          Never done this before, just throwing out ideas.

          Good luck!

          August 4, 2016 at 5:01 pm #41587
          Anonymous

            Here’s some products sold for auto restoration;
            http://www.eastwood.com/autobody/sound-deadening.html

            Steve A W

            August 4, 2016 at 6:14 pm #41591
            outboardnut
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              what ever i use Its going to have to be able to take some heat

              August 5, 2016 at 12:53 am #41608
              david-bartlett
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                Though not original, I used some of this recently on a Mercury 7.5hp. It did a great job quieting things down. Time will tell how it holds up but it is cheap and I have a lot left for other noisy motors.

                http://www.homedepot.com/p/E-O-12-in-x- … /100028603

                August 5, 2016 at 10:49 am #41623
                outboardnut
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                  IMO I would be concerned about the self adhesive staying put

                  August 5, 2016 at 10:52 am #41624
                  outboardnut
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                    I am leaning on getting this-
                    DEi 050220 Boom Mat Spray On Sound Deadening, 18 oz. Can
                    • Handles temperatures up to 300 F
                    http://www.speedwaymotors.com/DEi-05022 … aQod3Y0Exw
                    Info
                    Reduce unwanted road noise and deaden vibrations in hard to reach places with Boom Mat’s new Spray On sound deadener. Works perfect for trunk interiors, fender wells, undercarriage, body panels, rear quarters, inside door panels, and many more. Boom Mat Spray On also works as a thermal barrier to insulate against unwanted heat. Will eliminate any unwanted sound, vibration, or heat in any vehicle!
                    • Reduce unwanted road noise and vibration
                    • Won’t crack or chip
                    • Can be applied in multiple layers
                    • Helps prevent rust
                    • Paintable in 6 hours
                    • Single can will cover approximately 20 sq. ft.
                    • Handles temperatures up to 300 F

                    August 5, 2016 at 1:10 pm #41625
                    johnyrude200
                    Participant

                      For what it’s worth, just make sure whatever you go with isn’t going to shake loose or simply fall off anytime soon. Any of that gets sucked into the manifold and you’ll have a fun time of pulling off the manifold and cleaning everything.

                      August 5, 2016 at 6:53 pm #41639
                      outboardnut
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                        After sleeping on it I decided I did not like the idea of "Boom Mat Spray" because of possible faking at a later point and getting into the carb
                        So just out of curiosity I wrote Dynamic about their product "Xtreme" which is a blanket
                        This is what I received from the company
                        Dear Al,

                        Thank you for your interest in our products.

                        The Xtreme will work on the outboard engine cover and will never come loose as long as the temperature does not exceed 300 degrees F.

                        We also recommend to install our Hoodliner foam over the Xtreme if clearances will allow.

                        http://www.dynamat.com/automotive-and-t … hoodliner/

                        Please let us know if you have any other questions.

                        Best regards,

                        Technical Solutions
                        Dynamic Control of North America Inc.
                        http://www.dynamat.com

                        Now I’m leaning toward " Xtreme "but with out "Hoodliner"
                        I really don’t know the temperature with in the hood when the engine is running but
                        If a thermostat gets activated at around 125 degrees and the self adhesive can with stand temperature of 300 degrees
                        I would think all would be well
                        Do you have an opinion?

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