I apologize in advance for the vague subject line. As I read the following I realize it may be difficult to follow, please feel free to ask for clarification, no offense will be taken.


I need to know if the bump in the deck just above the rubrail on a 41 Marinette is solid or not. This bump up is to assist in the channeling of water on the deck to the rear of the boat. The problem I am having is that the water does not fully drain from this channel and I have about 6 inches of water about 1/8" deep that accumulates on the boat on a daily basis. It is on the NE side of the boat and the sun does not get there at all to dry it out. The water has accumulated at the extreme rear of the boat and has lifted up Awlgrip paint. Awlgrip rep claims this is an issue because Alwgrip top side paint is not designed to be under water. I need to get this water to drain out fully.

I was planning to cut a small kerf in this bump to allow the water to fully drain out. I need to know if any one knows if this bump is solid or not. If I cut the kerf and bump is not solid then I will need to fix the cut and then go to plan 2.

Plan 2 was to put a small drain hole in the deck and route it to the hull to drain over board. I am not sure of the access to this area from the inside. I have already removed the failed Alwgrip paint and need to repaint this area. I was thinking about a 1/8 inch drain hole.

I would also appreciate any information any may have on this and additionally if anyone has addressed this issue in some other manner.

Thanks in advance

Dan

Dan,

We have the same problem on our 39. The bump you speak of is not solid, it is a extrusion and you would probably cut through it before you could get all of the water to drain. There is a cross section of the hull in one of the brochures on this site that shows it. I was thinking of raising the area by fairing it forward far enough to allow the water to run over the top of the bump.

I can email you the picture if you can't find it.

Rob

click on "search" in the logged in as: line and then type in "old Marinette brochures". There is a whole pot full of brochures that I and several others put on there. Scroll down, waaay down and you will come to pictures of construction of the hull. It shows the extrusions. The bump or gun'l is hollow and the deck slides into it on one side and the hull slides into it on the other. If you drill or cut the bump it will drain directly into the hull. It is always interesting to look at all the brochures and see the different layouts.

John,

Nice post! I've seen that in drawings but it's good to see the actual material.

Roger

Wow. No wonder these boats are so solid. These interlocking Marinette extrusions are amazing. They tie the two halves of the hull and the deck and gunwales together and provide a continuous interlocked and welded connection, not just where a screw would be like on a typical fiberglass seam.

A few more photos of those two extrusions that are a bit better. Looks like the smaller cross-section is the extrusion used to join the bottom to the side. Note the difference in metal thickness of the plates.

Goldpoint

Good job on the photos

Roger

I found this while surfing for Big info thought it might help.
Killer extrusions, fairly heavy plating and all welded... no wonder they are TOUGH!

Fenders?? We dont need no stinking fenders!

Now that's a kind fellow owner. willing to sacrifice his time for a little refreshment. Nice offer Capt Brent.
I was pondering doing the cut out and asked about it last year, decided against it, someone said i may run into structural issues. Glad to see the pix in this post. Me thinks I may look into the drain hole idea as well.