cockpit scuppers 20 SF20

Mark · #1 11-04-2003, 09:40 PM

what if you were to raise the floor 2"-2.5" instead of 1" and then have the thru-transom scuppers ABOVE waterline? There are several others on the site that have gone that route [img]images/icons/wink.gif[/img]

Robert Fowler · #2 11-05-2003, 01:12 AM

I am having a 1974 SF20 completely restored including new deck and transom. Prior to the restoration, I was having a problem with water entering the cockpit via the thru hull scuppers when anyone placed his weight aft of the helm. The height of the cockpit deck (sole) is barely above the waterline. I found it necessary to insert plugs into the scuppers when the boat was idle and would remove them when on plane to let the water out. With the restoration I have directed the mechanics to raise the deck 1 inch in an effort to help eliminate the water problem.

I have a question regarding the method I should use in replacing the scuppers. The existing and original design exits the scuppers directly down thru the bottom of the hull. I notice that new models exist through the transom and have a backkflow preventer "flap" on the exist fittings. I also notice that the location of the exiting scuppers is below the water line.

I am leaning toward changing the original design which goes straight down and thru the hull to one that exits through the transom. A question is whether water will exit through this scupper with the backflow flap substantially below the water line. Will the pressure from the water outside exceed the pressure from water trying to exit from inside and thus prevent drainage when the boat is idle?

I will very much appreciate anyone's ideas on this subject for my concern is that after completing this rather massive reconstruction, water still enters the boat through the scuppers.

Thank you

hermco · #3 11-05-2003, 01:30 AM

If you run the scuppers out the transom they should be above the water line and I would use the Sea Scuppers by Rabud to prevent water backing in the cockpit. [img]images/icons/grin.gif[/img]

Robert Fowler · #4 11-06-2003, 02:13 PM

Thank you Mark. I am concerned about raising the deck too much because of the loss of interior freeboard. Maybe 2" will not be that noticable. It all seems to depend on the ability of the scuppers to drain the cockpit with the exiting fitting being below the water line. I am hoping that the RABUD scuppers with the ball will be the answer. Thanks

TUGBOAT · #5 11-06-2003, 02:40 PM

I never knew why some of the OLD Timers calles them SinkCrafts till I saw what You have,Drains thru the Hull ? I had the same problem on My 20' . Sitting, water poured in, always used plugs also.I went with ball scuppers & flaps over brass tubes for the splash well.Well I've only used My Baby twice ince I've finished Her.The ball scuppers still let water in , not as much as before.I hav'nt really put Her thru many test Yet.(Just happy to run to the Keys for a Blackened Fish sandwich!) Backing down,anchored,Fishing etc. just sitting and walking back to the stern water still flows in. Maybe because I have them mounted to close to the trim tabs ? I still prefer these to the SS ones that were on before.They flooded the deck anywhere !

Scream'n Reels'

Mark · #6 11-06-2003, 04:00 PM

I'm still a bit baffled by all the comprehensive redo's that I see being done on this site that fail to raise the floor. That lake in the back end of the boat was something that I was never able to get used to. If anyone is going to the trouble and expense to rip the boat apart and put in a new transom, by all means, raise the flloor several inches and finally have a self bailing boat.

FELLOW-SHIP · #7 11-06-2003, 04:46 PM

OK GUYS IT TIME FOR A DIFFERENT COURSE OF ACTION
This scupper thing has finally got my attention. I have read all the threads on wet feet long enough, I have thought about this issue without trying to invent something to correct this problem long enough. As of yesterday I stopped thinking along traditional boat repair lines and started thinking about a quick, easy, and cheep way or solving this design flaw which drives most of us a bit crazy or at least distracts us from our boating experience. I will be doing some Bata testing on a easy fix it for these scuppers that spit water up in the air like a Propos this weekend weather permitting and then spill the beans on my idea. If this craze experimentation works we will finally be able to put this puppy to bed.
FellowShip [img]images/icons/wink.gif[/img]

ocuyler · #8 11-06-2003, 05:18 PM

Fellowship - It's alive!

[ November 06, 2003, 04:19 PM: Message edited by: Otto Cuyler ]

abl1111 · #9 11-06-2003, 05:38 PM

Yeah. This is something that needs to be figured out once and for all. I am in the position now to get rid of the floor scupper and go through the hull.

I just have not had anyone, except for Rich, member # 44, have a very strong view on going through the transom. I tried to copy his drawing of what he did, but could not get it to paste over to this thread. So, if you're interested - go to 'Search'... Then, type in 'Scupper' as subject, choose the 'Repair/Mods.' section. Go down 3/4 of the way till you see " Scupper relocate " started by me, ABL1111. Scroll down till you see an actual drawing ( not the boat diagram ). That seems to be a good way to go...

I just don't have the balls to do it, unless I knew it would really work. Speaking of balls, I don't like the ball scupper idea - I forsee problems w/ stuff getting caught in there not to mention marine growth undermining the seal ( I keep my boat in the water 8 months of the year )

So, if someone can come up with a better mouse-trap - pls share it.

As for the scuppers having to be above the water line - I'm not sure of that. My Grady had them half in the water and half out and water almost never came back in. And that boat had the inexpensive, round plastic w/ rubber flap scuppers.

Something to think about, it just dawned on me. Maybe the floatation in the stern is not adequate. Thinking about it, my Grady White did not really dip into the water too much when weight was put in the stern. Maybe the Seacraft's design creates a much more sensitive affect when weight is put aft ?

Anyway - take a look at that thread I mentioned. It would raise the scupper at least 2" from it's 'stock' position...

ABL

EBEACH · #10 11-06-2003, 08:32 PM

Replacing the deck and raising it 2 inches is a lot of work. My deck is solid, and I had no reason to change things. I think every boat is going to float a little different. If after getting it the water and finding this a real problem, I could raise the deck. But it would be the last thing to do if I could help it. I'll be moving my battery from the front console to the back of the boat. I'm bow heavy not stern.

Wet foam stringers could account for a lot of problems. Did this boat (all) have problems right from the factory??? I don't know. Bill Potter would. I agree that the deck needs to be raised to allow the water to flow.

None of the boat test articles on the site talk about standing in a pool of water.