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Author Topic: Soundproofing  (Read 536 times)

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Steve Hansen

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Soundproofing
« on: July 19, 2019, 04:18:52 PM »

What is the thickest sound proofing foam used in the engine compartment. That would be for a mark 1 m25xp. I see many using 1 inch foam. defender has a 1 1/4 to a 1 1/2 for only a few dollars more. Was going to order the 1 inch but if anyone had success with thicker I may give that a go.
« Last Edit: July 23, 2019, 09:22:55 AM by Noah »
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Steve Hansen
Georgia Peach 1987 #349
Tall Rig/ Wing Keel
Universal M25XP

kh3412

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Re: Sound proofing
« Reply #1 on: July 19, 2019, 05:05:01 PM »

Just did mine you could probably use 1 1/2 for the sides but top and front would hit, with 1 inch not much room there. Infact the front or back of stairs you should reuse the plastic washer where the crank shaft sticks out.
 
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1987 mk1 a work in progress #618

Noah

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Re: Sound proofing
« Reply #2 on: July 19, 2019, 06:01:30 PM »

I recently did mine and 1-inch is maximum in most places and more than efficient—considering that in our Mk1 boats the engine space is open/cut out to the aft cabin, so you can’t insulate/block all sound. To cover all walls, etc. (obsessively), you will need more than one kit. Also, you will have to cut out a notch for the flywheel. Good news is:  it was a BIG improvement in sound blocking and looks, when completed (over my original flattened-out, degraded, crumbling insulation).

Edit:
I used their Sounddown spray adhesive, with self-tapping screws and fender washers (not stud kit)  to attach. You will also need extra mylar/silver tape that you can purchase elsewhere (cheaper) to cover all seams.
« Last Edit: July 19, 2019, 06:56:55 PM by Noah »
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1990 hull #1014, San Diego, CA,  Fin Keel,
Standard Rig

Steve Hansen

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Re: Sound proofing
« Reply #3 on: July 19, 2019, 08:51:21 PM »

Looks like I found info in tech notes August 2008 Vol. 26, No. 3. Seems as though Ron suggested 1 1/4 inch at least for sides. looking forward to changing out old soundproofing. Crumbling mess. Thanks for the feedback.
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Steve Hansen
Georgia Peach 1987 #349
Tall Rig/ Wing Keel
Universal M25XP

Noah

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Re: Sound proofing
« Reply #4 on: July 20, 2019, 04:49:14 PM »

Some pics of 1 in. Sounddown:
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1990 hull #1014, San Diego, CA,  Fin Keel,
Standard Rig

Steve Hansen

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Re: Sound proofing
« Reply #5 on: July 20, 2019, 10:19:13 PM »

Thats a nice clean engine compartment Noah. Is the second from last photo the bottom steps? Looks like there is a notch cut into soundproofing for the shaft. Do the steps easily clear the shaft when putting steps back in place?
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Steve Hansen
Georgia Peach 1987 #349
Tall Rig/ Wing Keel
Universal M25XP

Noah

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Re: Sound proofing
« Reply #6 on: July 21, 2019, 08:55:59 AM »

Thx. Yes, the steps panel does slide in with clearance however, I just need to be a bit careful when sliding bottom edge past flywheel that it doesn’t catch on way down.
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1990 hull #1014, San Diego, CA,  Fin Keel,
Standard Rig

Ron Hill

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Re: Sound proofing
« Reply #7 on: July 22, 2019, 02:13:47 PM »

Steve : Look in the Mainsheet Tech Notes for my article on Replacing the Sound proofing (w/pictures). As I recall it was 1 1/4 " that I got from Defender.  I cut it to size with a band saw!!

A thought
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Steve Hansen

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Re: Soundproofing
« Reply #8 on: July 23, 2019, 04:27:41 PM »

Ron Hill Thanks :thumb:
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Steve Hansen
Georgia Peach 1987 #349
Tall Rig/ Wing Keel
Universal M25XP

Ron Hill

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Re: Soundproofing
« Reply #9 on: July 27, 2019, 01:28:26 PM »

Guys : When redoing the soundproofing, here is a heads-up!!

On a M25/M25XP if any of the Aluminum sound proofing facing touches the unguarded temp connection on the top of the thermostat - you'll get goofy hi-temp readings on the engine instrument temp gage.

In a Mainsheet Tech note article, I recommended that you might slip a protective boot over that connector!

A thought
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Noah

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Re: Soundproofing
« Reply #10 on: July 27, 2019, 03:47:57 PM »

Ron— funny you mentioned this rubber boot and unprotected wiring shorting-out against the soundproofing  issue. So true!  I had a red rubber battery cover/boot over my engine temp sender connection wire terminal which had fallen and landed on hose below. It is shown in the circled portion of the attached photo. I later secured it back in position! 😎
« Last Edit: July 27, 2019, 05:23:10 PM by Noah »
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1990 hull #1014, San Diego, CA,  Fin Keel,
Standard Rig

Noah

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Re: Soundproofing
« Reply #11 on: July 28, 2019, 12:56:23 PM »

Secured:
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1990 hull #1014, San Diego, CA,  Fin Keel,
Standard Rig

Ron Hill

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Re: Soundproofing
« Reply #12 on: July 28, 2019, 01:52:04 PM »

Noah : I must complement you on the cleanliness of your engine compartment! Have to admit that mine looks almost the same.  :clap
A clean engine and compartment make it easy to spot leaks and helps with cooling. Some of the other owners engine compartment pictures almost make me  :cry4` !!

A thought
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mdidomenico

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Re: Soundproofing
« Reply #13 on: July 29, 2019, 05:27:15 AM »

this thread is very timely given my current efforts to rebuild the engine compartment...

it's sooo clean the engine and dirt become transparent... :)

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1989 Cat34 #856, original MXP-25(ab?)

Phil Spicer

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Re: Soundproofing
« Reply #14 on: July 29, 2019, 03:37:37 PM »

   WOW!!! On your next trip to the great lakes you can make mine transparent also
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Phil & Marsha Spicer-Dock at Sandusky Sailing Club-
 Sail Sandusky Bay,Erie Islands,& Western Basin of Lake Erie.
Steamboat is #789 Tall Rig-Wing Keel-Our picture is what we see from our dock which is a view of Cedar Point Amusement Park"The Roller Coast
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