Leaking floor scuppers

RIRED · #1 02-25-2003, 07:38 PM

Own a "74 CC I/O that has leaking floor scuppers into the bilge. Whats the best way to stop the drip? Also, any idea why one of the floor scuppers sucks the water out of the boat and the other one shoots it in? Please help.

Jon G · #2 02-25-2003, 09:13 PM

Welcome to CS RIRED. The best way to fix those scuppers is to replace the brass tubes with new ones and seal them real good. If you do a search here for "scuppers" I'm sure you will find a few posts about this problem. As for the water shooting in one of them check that they both have the small piece of glass that acts as a deflecter still there. These are a small rectangle wedge on the outside of the hull just in front of the scuppers. It sends the water down slightly before it goes over the end of the scupper. If you are missing one of these you might be catching some water or the bottom of the tube is damaged grabbing some water as well, take a good look at you tubes on the outside. You do not [img]images/icons/shocked.gif[/img] want these leaking into the bilge. [img]images/icons/smile.gif[/img]

Miles Offshore · #3 02-25-2003, 09:18 PM

You need to replace the tubes that go down thru the scuppers. if they are plastic you need to change over to brass and flare both ends. The reason one shoots water in is because the bottom of the tube on the underside of the hull is probably lower than the "dam" just forward of the scupper. When you replace the ones that are in there now ensure that the flared bottom does not extend past the dam, ledge or whatever you call it. The tube is pretty long also and most marine stores around here dont carry, you will have to locate them somewhere else. A friend of mine also made a custom flareing tool that makes it pretty easy. I can probably post a drawing of the tool if anyone is interested. craig

Scott · #4 02-26-2003, 12:31 AM

Boston Whaler dealers sell those tubes in the length that you'll need…been there done that

JonG and Miles hit the nail on the head....That wedge forward of the thru-hull creates a venturi or an area of lower pressure hence once the boat is running it sucks the water out. Any thing that has changed in front of that thru-hull could change that or like miles said ... if something is sticking past the wedges profile the opposite occurs.

Miles I would like to see that tool

RIRED · #5 02-26-2003, 09:04 AM

Looking carefully at the brass it does not look to be lower than the bottom of the hull. There is no dam. What would you recommend? Is it hard to replace the brass tubes? Thanks

jw · #6 02-26-2003, 10:09 AM

I had the same problem. I just removed the thru the bottom scuppers. Changing over to a Perko scupper, and now trying to figure out if the scuppers should drain to the bilge or go overboard.
My rig will live on a trailer, so I do not have to worry rain water sinking her. Plus the blocks of wood that the scuppers went thru were rotten and had become loose. I can post a few picks about what i am doing after i get finished with this Plauge.
Covered in fiberglass dust.
JW