Oscillating tool would work for core removal.

[img]https://www.rockwelltools.com/media/catalog/product/cache/2/image/840x675/9df78eab33525d08d6e5fb8d27136e95/r/k/rk5132k_angle.1528214999.jpg[/img]

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Using a phone, all I got. I'll look into it. Spent 2 hours getting itchy yesterday. Surprisingly, not the whole core is shot, only about 1/4 is rotten, the rest is fine. Which I think was worst case scenario, because it makes it 10 times harder to remove the old core when it is still bonded. This boat seems to be all like that. The transom was horrible in about a 1'x1' spot. But only the outer layer of wood. It was 3 sheets of ply that were individually laminated, so the 2 inner layers were fine. The core appears to be similar in that three inches from the edge is gone, but the rest is solid. Such a pain.

Any recomendation on the best tool to remove it?

Yeah, I have a file size limit but im working on something so that should be an issue but right now, I have the file size limit so that loading the site/topics on a mobile device doesnt take ages and plus wont take up so much bandwidth and keep the size of the site down for back ups. I dont feel like sitting through hundreds of gigs of files to download every week.

Are you taking pics with a camera or cell phone? You should be able to change the camera settings on your phone to take smaller resolution photos if that's what you're using.

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I will start the build thread when I can figur out how to shrink photo files enough to be able to post them. I was grinding the inside of the hull a bit yesterday. Had full intentions of just half a$$ing it and slapping a floor in it and mounting the tower of power. Well, I ground through the core skin in a couple places and decided to check it out. As expected, its shot. So, the project time line just got stretched by a year. Since the bad core is looking me right in the face, I might as well do it right. So I will be cutting the core out this afternoon and trying to figure out what to do next. The good thing is, now I can justify painting it when I'm done. As well as searching out a different motor. 115 would have likely been fine, but I am thinking a 225 OMC is in order now :)

Don't' forget to document your build. If you sell in the future, it will prove it was done.
Please start a restoration thread so we can see your progress.

And the best thing about the vamp, believe it or not, it's one of the faster hulls. With the right set up, they will haul some serious you know what. LoL

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Good call. Do it right and the boat will be good for another 20+ years.
And should you ever decide to sell it, you'll have a much better chance doing so with new core, stringers, and transom.

Looking forward to seeing your rebuild worklog here.

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So, after reading more threads on this sight and S&F, I think I want to actually do it right. Plus, the transom is being such a B!$<H to get out, I feel like if I half a$$ it at this point, my effort there will be wasted. Once I finally get the transom out, on to the core I will be going. Probably going to sell the tower of power too, and look for something much more substantial. BUDGET just went Bye Bye. If I stuck with the tower I would be in the boat on the water for about 1000$ in a couple months. But with the new plans, next year and a LOT more $. Oh well, in the words of Ricky Bobby, "I wanna go fast"

A neat trick is to cut a hole in an old board. I used a 12” long piece of 1”x6”.
Then pull the centering bit out of the hole saw.
Hold the board against the inner hull and start drilling. You will know when you get thru the first skin. The denseness of the fiberglass will soften and it will feel like you are cutting thru a piece of bread.

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