Curved transom rebuild and enclosure

[jwill3131]

I want to enclose the transom and remove the splash well on my 1975 246 ccc(same hull as 246 FF). The shape of the transom is slightley curved coming off the sides before it gets flat where the motor mounts. I was wondering if anyone has rebuilt a transom with a curve and what the best way to do this would be?

[gran398]

You are enclosing the transom...would you like to run a big single or twins? If a single, you can probably maintain the existing transom curvature, leaving the flat in the center, and mount a Porta-Bracket.  If twins, will be best to rebuild completely (straight across) and fab an Euro transom or mount a full width Armstrong bracket.

Please provide some pics. Give it a whirl, it is a lot easier now than it used to be. Instructions abound.

Welcome aboard

[RickK]

I want to enclose the transom and remove the splash well on my 1975 246 ccc(same hull as 246 FF). The shape of the transom is slightley curved coming off the sides before it gets flat where the motor mounts. I was wondering if anyone has rebuilt a transom with a curve and what the best way to do this would be?

My 170 has about 3/8" inward difference from the corners to the motor mounting spot where it flattens out - is that like yours?  Seems mine is flat most of the way across but does bow inward at the corners.
When I replaced my transom coring I clamped some 2x4s on edge across the width of the boat with no improvement.  Check out what I've done http://www.classicaquasport.com/phpbb3/viewtopic.php?f=2&t=10101 - the transom starts on page 2.

I would think that if you need to have a flat transom for say a full width bracket, you'll need to cut out the transom totally and start fresh, which really isn't a hard thing top do as long as you brace the boat sides and bottom so it doesn't malform when the transom is cut out.  Boat Builders Central has an example where they cut the transom out of a flat back and started fresh.

[slvrlng]

My 222 transom cap has a pretty good rise from the gunnel to the motor cutout on each side. You would have to cut the whole inside out and then attach a outside form then lay glass up to the same thickness as the outside skin then reinstall the core.
Here is a link to a rebuild on BBC that shows exactly how to do this. It is much easier to do this if the outside skin is left in place.

http://forums.bateau2.com/viewtopic.php ... 9&start=20

Here is the way mine looks. If you extend the lines to a midpoint where the middle of the motor is it would have a pretty good rise. Maybe 6 inches!



This is what a 74 22-2 inboard transom curve looks like from the factory. Again around a 4 to six inch rise.

http://www.classicaquasport.com/gallery ... -2&cat=558

[dirtwheelsfl]

Might be able to do three 1/2" cores, one at a time. My friend did an old robalo that way, theyve got a decent sized curve...

[RickK]

Geez, now I'm confused - is he talking about the flatness of the transom being curved or the top curve like Lew is talking about?

[gran398]

Geez, now I'm confused - is he talking about the flatness of the transom being curved or the top curve like Lew is talking about?

I took it as you did Rick...the outside curvature as related to mounting the engine(s).

[Circle Hooked]

I think he's talking about the cut out on top

[jwill3131]

thank you for the feedback, I was talking about the transom being curved outward instead of being flat across the back. Like if you are looking at it from the side you can see it sticking out. I didnt know whether it would be easier to cut the transom completely out and make it flat or do several thinner pieces of ply wood one at a time to be able to match the natural curve. my plans are to mount a single engine bracket with a 225-250hp on it so I dont have to get a custom full width bracket made up. I will try to get a pic up of what I am talking about this weekend pending we get a break in the snow.

[wingtime]

OK that's what I thought. The transom bows out towards the stern so when you look down at the boat from the sky you see the curve.  It should be easy to match the curve like you said by layering up thin sheets of plywood.  The finished result would be stronger than a flat transom.

[jwill3131]

[jwill3131]

I'm having a hard time getting these pictures up but you'll see a few of them when you click it. I just got a new orbital sander so I wanted to try it out on a few spots. I still don't understand why someone would paint a boat that ugly brown.