Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: Silent Running Paint experiences
Posted by Perry Vayo on 07/08/13 - 6:21 AM
#1
Hi,
I finally got out on the water this weekend - we had a great time and the old Evinrude ran perfectly. But, I was reminded that it definitely wants everyone to know that it is in the room! ;-)
So, I've been poking around looking for ways to quiet an old outboard down a bit, and I came across Silent Running Paint. Has anyone here tried it on their engine cowl? If so, how did it perform? Was the heat rise noticeable? What's your experience with this stuff? It sounds like a good place to start.
Thanks.
Posted by luckydog on 07/08/13 - 3:50 PM
#2
Cool boat! Does your engine still have the sound deadening foam rubber inside the cowl? Mine was removed by mice over the years and when I finally replaced it I was amazed at how much quieter it was. I have the same engine as you. You can still purchase the OEM pre-cut foam for those engines. Perhaps a layer of that paint and some new foam would be the cats meow. The paint absorbs vibration while the foam rubber absorbs sound. I would not worry about the heat generated from the paint, their website says the temp increase is measured in ten thousandths of a degree!
Posted by Perry Vayo on 07/08/13 - 5:58 PM
#3
Yes, in talking to the rep, he said the heat was so minor that they don't really measure it anymore. Not enough to worry about.
The foam in my cowl is also long gone, just hard, loud fiberglass. Your idea is a good one. That is what I was thinking myself.
Do you by any chance know the dimensions of your engine cowl? Doesn't need to be too precise. That would be a big help.
Perry
Posted by Tom W Clark on 07/10/13 - 9:00 AM
#5
http://silentcoating.com/
The viscoelastic properties of Silent Running liquid-based coatings absorbs the noise and vibration and converts it into low-grade heat, which is dissipated throughout the applied surface.
Guess what? Foam works exactly the same way.
Posted by BillDemers on 07/10/13 - 4:48 PM
#6
You could try Dynamat, I've seen it used a lot in the automotive industry
www.dynamat.com
Posted by Perry Vayo on 07/11/13 - 6:07 PM
#7
Thanks for all the feedback. It looks like I will get up to the boat this weekend, so I can pop the cover and check on the condition/existence of the foam insulation. I will measure the thing too. If I can get away with just a quart of the paint, I might try it. Otherwise, it seems too spend, and I will replace the insulation instead.