3M 5200 VS. West Systems Gflex

[Big Kahuna]

Definitely staying tuned. Currently debating whether to use gflex or 5200 to fix this!

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You are going to need to make a solid mount for mounting that, then at the rear, you are going to just basically seal it up. Your strength will have to come at the forward mount to secure the tube. That is a crappy design by Jeff. Cannot believe he did not design some kind of stringer or something to secure that tube to the hull near the bulkhead. Yours cannot be the only one that has broken.

 

[2lick]

Could this possibly be from the heat that the exhaust see's? Maybe thats why yamaha had an exterior flange?

I dont know. I swear some one educated me that there is a chemical reaction between aluminum, carbon fiber and epoxy. I cant reacll where or who, I dont want to spreda the wrong info.

I usually just act dumb in public, gather info, and fix... Here is my carnage thread and my fix. Some people shared some good info and opinions.
http://www.x-h2o.com/index.php?thre...e-in-exhaust-outlet-pipe.173835/#post-1851603

 

[Big Kahuna]

I dont know. I swear some one educated me that there is a chemical reaction between aluminum, carbon fiber and epoxy. I cant reacll where or who, I dont want to spreda the wrong info.

I usually just act dumb in public, gather info, and fix... Here is my carnage thread and my fix. Some people shared some good info and opinions.
http://www.x-h2o.com/index.php?thre...e-in-exhaust-outlet-pipe.173835/#post-1851603

Carbon and Alum will suffer from Galvonic Corrision. You can isolate the two to where they do not touch to prevent this. I installed all stainless tubing in my freak and still used heat shrink everywhere there was contact.

 

[MADMAT]

I repaired a broken engine mount with 5200 after reading about it hear and have flopped mulitple times in the surf and she is still holding strong.
*I have a spare mount but I want to see how long it will last with 5200.

Quite a while!! 2 seasons. I have beat crap out of my 5200 repaired mounts!

 

[Christian_83]

I dont know. I swear some one educated me that there is a chemical reaction between aluminum, carbon fiber and epoxy. I cant reacll where or who, I dont want to spreda the wrong info.

I usually just act dumb in public, gather info, and fix... Here is my carnage thread and my fix. Some people shared some good info and opinions.
http://www.x-h2o.com/index.php?thre...e-in-exhaust-outlet-pipe.173835/#post-1851603

Carbon, aluminum and saltwater will start galvanic corrosion. It might also be in very small scale with freshwater, but the saltwater is really a biatch and speeding the process up.

 

[Sanoman]

l got some good video of the bending and flexing the carbon piece,but having trouble attaching the files here.l'll put it up later as soon l can figure it out

But the results changed my mind about what l will be using in the future on builds.Looks like the overall winner is 3M 5200.What impressed me was the the flexibility without cracking and losing its bond.Even though the Gflex was somewhat pliable it was no where near the 5200. 2licks post about the exhaust tube moving a lot is a good example of epoxy vs. a bonding agent that will move more.

So looks like the Circus build is going to get a lot more 5200 in it. l'll still use Gflex for inserts and other areas for holding power.

Appreciate all the opinions and tech information that were given (@DAG and @2lick) Also to @McDog for his "told ya so"!

 

[JetManiac]

5200 is my choice for sealing applications like the pipe throughhull, but the gflex is better for bonding type applications like inserts.

 

[OA5599]

thought this might be of interest.