4200 best option for fixing vibration/rattle ?

[indoman]

Will be pulling the floor on my 2013 Alumacraft 1648NCS to try and eliminate an obnoxious rattle/vibration at anything above 1/2 throttle.

I'm considering putting a serious bead of 4200 along the entire length of each rib (?) then re-riveting the floor back in place.
I've already drilled and added about a dozen rivets which has improved the noise...but it's still there.

Are there any better options? Love the boat, HATE the freaking metallic rattle.

Thanks.

 

[T Man]

I would think strips of neoprene may do a better job.

 

[indoman]

It's interesting you say that! My first thought had been to use strips of rubber (think bike inner tube - I have some laying around) but someone at work suggested sealant.

Sealant seems like a better idea as it would fill all the gaps and adhere to the surfaces permanently. Or as permanantly as 4200 will.

 

[TNtroller]

I was reading up on the 4200 vs 5200 for some projects I got planned. One comment stuck in my mind which was "If you think you MIGHT want to move or remove whatever it is you're wanting to install, use 4200. If you never want to remove it, use 5200.

I think I would considered something else other than 4200, like pool noodles, or whatever, but if you don't get the rattle fixed when using the 4200, its going to be difficult removing it to try again.

 

[PSG-1]

RTV Ultra Black is a very durable sealant, but not as tenacious as 4200, or 5200.

 

[indoman]

Any idea on what the set up / cure time is with the RTV? The only concern I have using 4200 is the relatively short set up time. About 1.5 hrs I think is what the 3m site said. ??

I figure by the time I put a good bead on all the ribs, line the floor back up, put cleco fasteners in place, and install approx. 70 rivets, I'll kill somewhere between 1.5-2hrs if I don't have any hiccups.

Thoughts?

 

[earl60446]

You may be better off not letting it adhere to both the rib and floor, easier to take the floor out in the future. In other words just lay a bead down and have it stick to the bottom piece (rib), it will then act as a sound deadener by keeping the rib and floor slightly apart. You don't want the stuff to all squeeze out when you tighten the floor down. The neoprene mentioned may work even better if it adheres to the rib well.

Tim

 

[PSG-1]

Yep, put down a thin bead and let it cure. I had to do that for my jetboat cowling, because weatherstrip wouldn't hold up. RTV Ultra Black does.