Through transom scuppers
 

I will more than likely be redoing the entire transom this winter and was thinking about closing up the through hull scupers and having regular scuppers (like larger boats have) go out the transom. Is this a problem? I don't want to have to do anything to the deck in order to make the water drain. I am keeping the drainage channels on the deck and would think the water would still drain aft and out the transom scuppers even while sitting on the mooring. There has to be more to this as i don't think i have seen this modification. Maybe it has been, i don't know for sure. Does anyone see any problem with this? Thanks for any info.

Re: Through transom scuppers
 

Search the posts, there's lots of pictures and info. on it. I'll be doing the same but on an OB 23. Please post pics of yours also.

Re: Through transom scuppers
 

I don't mean ball type scuppers. I am talking basically 2 holes at deck level that run straight aft through the transom. Is the deck to waterline too low for this. Basicly, look at any lobster boat or sport fisher scuppers and they simply have two holes, 1 each side at deck level that allow water out the transom.

Re: Through transom scuppers
 

Hey Buddy- my old mako inboard had exactly that 2- 1 1/2" holes going straight thru the transom- im not sure where the deck /waterline lines up on the seacraft though. I have ythought about it myself- same kind of flap like is on the exhaust and a large enough scupper to move some water out if you really need too. keep us "in the know",lol- see ya- craig

Re: Through transom scuppers
 

I need to figure this out myself. I think my stbd through deck is leaking; always a little water on that side but not port!

Re: Through transom scuppers
 

Your previous posts have indicated to me that you keep your hull in the water, correct? If so, take a few measurements to figure out the relationship between the spot(s) on the inside face of the tramsom where you would drill the holes and the scum line along the outside face of the transom.

Re: Through transom scuppers
 

I have the 23 outboard and keep it on a trailer most of the time. So what I say maybe not be a perfect answer as much as it is my opinion. Anyway I would Never have through the transom scuppers with out a check valve type device to prevent water from back flushing and coming into the boat. SeaCraft hulls have a low deck design and to not use either a good flap or ball scupper valve is juggling with fire and dynamite. All it would take is one bad experience to ruin what you got for a long time and lots of money to fix a avoidable mistake.

FellowShip

_______________________________________________

My motto: Just for the Grins :D

Re: Through transom scuppers
 

I'm in the middle of transom/floor replacement in my 23. We've put in large through transom scuppers BUT the floor will also end up being raised about 2". http://i57.photobucket.com/albums/g2...ines/csc45.jpg
http://i57.photobucket.com/albums/g2...ines/csc46.jpg
http://i57.photobucket.com/albums/g2...ines/csc64.jpg

Re: Through transom scuppers
 

Elihja(sp)- i just checked on my transom and if you see the four bolts on the portside of the transom, my deck is approximately even with the bottom two (bolts in the picture)- based on the waterline with just me in the boat , if your scuppers go from bottom bolts up there should be know problems with locating them straight thru the stern hatch and out thru the transom. Ill find that picture of my old boat that had the flaps on the outside of the transom- craig

http://img.photobucket.com/albums/v4...x/S4010063.jpg

Re: Through transom scuppers
 

Went out the back last spring wiih TH flaper succpers, used pool pipe flex pvc works well be careful cause of angle of transom with TH lay out Mine is 1 half inch above chanel sits above wter with 250 suk septer

Re: Through transom scuppers
 

Thanks miles, that picture really helps. I will go out to the boat tommorrow hopefully and try to take some measurements and a few pics. I would think this would be able to work for us inboards as we don't have the weight sitting on the back. Thanks for the help guys. I will be doing the work sometime this winter and will for sure post some pictures.

Re: Through transom scuppers
 

I just went down and took some quick measurments and pics and i don't think it will work. it was aprox 25.5 inches from the inside from the deck to the top of transom, when i transfered that measurement to the outside it came right at water level. here are some pics of it: http://i19.photobucket.com/albums/b1...1234/p4121.jpg
http://i19.photobucket.com/albums/b1...1234/p4121.jpg
http://i19.photobucket.com/albums/b1...1234/p4119.jpg
http://i19.photobucket.com/albums/b1...1234/p4118.jpg
http://i19.photobucket.com/albums/b1...34/p4115-1.jpg

Re: Through transom scuppers
 

My through the floor drains appear to be glassed in....'74 Tsunami. Is that the norm or was that a mod someone did later??? I want to go through the transom as well...I was going to raise the floor about 1.5 inches and though about leaving the through floor in the corners and just plug them. I like bonefish's scuppers...that may be my model. Everything I've seen on this site about the 23's looks like they would drain fine with through transom scuppers...the decks looks about 2-3 inches above the water line...???

Re: Through transom scuppers
 

Does water come up the scuppers you have now when there are two guys on one side in the stern? If so then it will not work. I know it wont work on my boat... I'll need the ping pong balls. Our commercial salmon boats in Alaska used to have the holes thru the back of the transom like you described on the Lobster boats.They were rather large 3 inch holes. No flaps no nothing just holes. When we filled the boat with a heavy load of fish we had round plugs that screwed into the holes from the inside of the boat. That way we did not take on water with the heavy load. I'm a believer that what ever size hole you make in your transom for scuppers you should be able to plug it from the inside of the boat in an emergency should your outside water intrusion device fail.

strick

Re: Through transom scuppers
 

Strick, you make a good point and after you mentioned that I remember I did have to keep mine plugged on the old boat a lot of the time when there were two people in the stern. Now to go against the grain a little, and since i leave my boat in the water as Chance does, I like the drains going out the bottom. They really work great for rainwater and to me unless I am heavy on fuel they are really not a big deal- I just put the plugs in when I first get in the boat and forget about it. I can remove them again when I am running if for some reason I need two. If just me in the boat I dont need to plug them at all. I think you are making a wise desicion not messing with them Chance. Those pix of your boat sure look nice too!

Re: Through transom scuppers
 

I was hoping it would be just a matter of making new ones ala bonefish. I guess I better rethink that. What's the best method of pulling out the brass tubes in the floor drains...??....looks like I could grind off the flange and just push them out.
Here a couple of shots I snapped by holding a camera under the floor. Look like the floor has a built up area that mates to a built up area on the hull. I'm wondering if the white stuff is the adhesive they used to put the liner in??
You can see the seam pretty clearly....I assume if the brass tube leaks then it would leak into the hull through the seam??? You can see the shape of the drain channel along the back at the top of the photos....

Portside
http://i94.photobucket.com/albums/l1...tsidedrain.jpg

Starboard side
http://i94.photobucket.com/albums/l1...rsidedrain.jpg