Glastron Carlson CV23 Restoration

[frankdevrieslentsch]

I amount of work that you will be doing to set the drive back it would not be much more to make room above the drive.  The only part that you need to worry about clearance is the very back of the outdrive above the trim tab.  What I measured and from the other boats that I have seen, even from the factory the drive is close when trimmed all the way up for trailering. Depending how far back you go you may eliminate the problem all together.

If you look close you can see what I did. However even with moving the drive up 2 in I didn't need to do this I found out. I will however have to limit my trim rams to that when I trim up for the trailer the back of the drive doesn't hit. The area in the black oval is the area you have to worry about the drive hitting.

I want to set it 6 inches back, so then I eliminate the hitting against the back I think. I measured everything again today, and I saw that a transom assembly is just going to fit under it. So I stil can set it back I think. But I still doubt wheter I going to do it or not.

[Frankm]

Hi Frank.

You planning to reposition the complete transom?
Why not rebuild the hull as is...new stringers, deck and a non cut out trandom first so you can re-calculate your X dim when you have the hull ready.
Then ...build your own 6"extension box for the what ever drive so you keep the engine its weight where it is now.
Performance wise that would be much better than set back the engine the wanted 6" too !!

F

[frankdevrieslentsch]

Hi Frank.

You planning to reposition the complete transom?
Why not rebuild the hull as is...new stringers, deck and a non cut out trandom first so you can re-calculate your X dim when you have the hull ready.
Then ...build your own 6"extension box for the what ever drive so you keep the engine its weight where it is now.
Performance wise that would be much better than set back the engine the wanted 6" too !!

F

That's a real smart idea, to build an extensions box.
Do you mean something like the one on this transom assembly?

[Frankm]

Jep..or some thing like that.
Those extension boxes nd parts are expensive but you can possible weld your own.

To extend the hull and keel makes no difference in set back, you want only the drive further away from the transom.
You could also build a box out of 2.1/8" thick plywood 6" deep, that you bolt and glass to the original transom as high as possible above the  keel and mount the drive on to that box.
You use the mcm transom motor mount plate on the original transom with some mods for the steering. Also you need to extend the coupler with a 6" spacer in between the flex plate and coupler (never done this) or find a 6" longer drive shaft.
Possible when this 'box is wide enough you dont have to go hydraulic on the steering, you might be able to re use the steering arm somehow.

F

[frankdevrieslentsch]

Jep..or some thing like that.
Those extension boxes nd parts are expensive but you can possible weld your own.

To extend the hull and keel makes no difference in set back, you want only the drive further away from the transom.
You could also build a box out of 2.1/8" thick plywood 6" deep, that you bolt and glass to the original transom as high as possible above the  keel and mount the drive on to that box.
You use the mcm transom motor mount plate on the original transom with some mods for the steering. Also you need to extend the coupler with a 6" spacer in between the flex plate and coupler (never done this) or find a 6" longer drive shaft.
Possible when this 'box is wide enough you dont have to go hydraulic on the steering, you might be able to re use the steering arm somehow.

F

I think that this is an very interesting idea, and I'm going to work this out.

[frankdevrieslentsch]

Some more progress today,
my dad and I removed the the top half of the boat and hung it above the boat. We managed to get it up high enough by lifting it with two excavators. I build a frame to support the top half while it is hanging there, so that it is not twisted or changing shape.

[frankdevrieslentsch]

Two more pictures.

[california special]

mercury and volvo both sell spacers you can install in the trim cylinders. they limit the hight the out drive can be raised to avoid hitting swim platforms exc.

[Rosscoe]

Interesting. I certainly do not claim to have seen everything but I do not recall ever seeing a 23 with an OMC outdrive. Mercruiser must have been an upgrade/option?

[frankdevrieslentsch]

Interesting. I certainly do not claim to have seen everything but I do not recall ever seeing a 23 with an OMC outdrive. Mercruiser must have been an upgrade/option?

This is also the only one with an OMC that I have seen, I saw a picture of a brochure and in that brochure stood that you could choose between an Mercruiser 228, an 260 and a 240 OMC. Apparently there where not a lot of people that wanted an OMC.

[Rich_V174SS]

Some of you know that I've been converting an OMC to a Mercruiser on a boat project. Here:

http://forum.cgoamn.com/index.php?topic=4821.0

[frankdevrieslentsch]

Last weekend I removed the engine stringers, it was a nightmare to get them out! They were glued with real strong stuff, and they were encapsulated in a very thick layer of fiberglass. I hope that getting the other stringers out is not going to be as hard as it was to do these two. I also discovered that they nailed the stringers and transom together, with LOTS of nails. Why the hell did they do that?

[frankdevrieslentsch]

This time, I removed all of the stringers. I only left the bulkheads and half of the transom in it, I remove them the next time. After that I can start with grinding!

[frankdevrieslentsch]

An update after a long time. I have bought a donor boat where I am going to use the engine, transom assembly and the drive from. It's an old Wellcraft Nova 250, but with an engine and a drive from 2008, with less then 150 hours on it. I also finished the endless proces of grinding, so I can now put stuff back in the boat again  . I'm not sure anymore about wich materials I want to use for the new structure, but I'm leaning towards polyester resin and okoume plywood.

Here is a picture of the donor boat, and two of the finished grinding.

Frank

[Rosscoe]

This time, I removed all of the stringers. I only left the bulkheads and half of the transom in it, I remove them the next time. After that I can start with grinding!

Let the fun begin....

[frankdevrieslentsch]

An update after more than a year. The past year i've had it very busy with school, but since a few weeks i have some more time to get stuff done on the boat. Last weekend i have glued the transom in.

[Rosscoe]

Out of curiosity how many pieces made up your transom?
When I removed mine, it consisted of a full width 1/2" pc ply and 2 pcs of 3/4" in the middle.

[frankdevrieslentsch]

Out of curiosity how many pieces made up your transom?
When I removed mine, it consisted of a full width 1/2" pc ply and 2 pcs of 3/4" in the middle.

I made the transom out of three pieces. One of a full width that is 18mm (45/64 inch) thick , and two pieces in the middle that are 12mm (15/32 inch) thick.

[fireman24mn]

I am just getting my garage cleaned up so I can get back to work on my 23 as well.