Need help deciding how to fill a scupper hole

[catfish4767]

I just picked up a new ski that was cut for a scupper however it was cut too big. Instead of trying to make it work, I am just going to fill the entire hole since it has a bilge and I will be riding on a small lake. My idea was to use polycarbonate plexiglass and 5200 to initially seal the hole. Then once that is dry, go back and fiberglass over the top of that using an epoxy resin and heavy mat. I plan on repeating this for the hole inside the hull. My brother thinks I need to use a rising foam he used to back fill his footholds but couldn't remember what he used. Something from Blowsion. Any suggestions would be greatly appreciated! Thanks!

 

[catfish4767]

Here are some pictures

 

[750sxip]

I'd use this

http://www.petersenproducts.com/category-s/1891.htm

 

[Mike W]

What you are planning is not a very good idea. If it pops off while riding you're screwed. If it were me I would glass it over then fill the void with two part foam. Then you can giver your scupper install a second try.

 

[750sxip]

I don't like scuppers. I filled the tube with foam and glassed over it. I'd use 2 of the plugs, one inside and one out if you don't want to glass.

 

[McDog]

Female screw fittings epoxied in and plugs screwed into them to close them off. Go look in pvc fittings section of Home Depot.

 

[catfish4767]

I don't want to install the scupper. The hole was already cut when I got the ski and it was too big for the current scupper. I just want to seal it so it won't take on water.

 

[catfish4767]

If it pops off while riding you're screwed.

It shouldn't pop off too easily. I was going to 5200 the plexiglass then use a 2 part epoxy resin from US Composites to fiberglass over the plexiglass plate.

 

[waksk8]

View attachment 330449 I'd use this

http://www.petersenproducts.com/category-s/1891.htm

I was using the same thing but putting in the engine bay

 

[catfish4767]

I was using the same thing but putting in the engine bay

Have you installed it yet? Tested it out?

 

[catfish4767]

I bought the 2 part fiberfoam kit from Blowsion. Going to 5200 a plate over the back hole, fill the column with the fiberfoam and then cover the hole in the engine bay with a plate and 5200. Anyone agree with that approach?

 

[McDog]

No. If your going to fill it with foam then just glass over it with some extra thickened epoxy to ensure waterproof seal and skip the 5200 and plate.

 

[McDog]

Seriously though. This would be so much easier and could easily be swapped back to scupper use in the future (like if you sell it).

 

[yamanube]

What hull is this and what was originally on/in that hole?

 

[catfish4767]

What hull is this and what was originally on/in that hole?

This is on a squarenose. I don't know much about it. The hole through the hull has a solid wall around the entire channel. Tried to show that in the second picture

 

[McDog]

I bet that pipe is pvc and the fittings I posted above can glue right in.....

 

[waksk8]

Have you installed it yet? Tested it out?

I used it for a whole summer, but the way your ski has a smaller hole in the bay would not work how i used it.

 

[Kny21]

if you're gonna glass it back up then easiest route would just use construction spray foam (I believe LockTite has a newer product that better than the Great Stuff) to fill hole and sand down flat and lay a couple layers of glass. You can get A/B foam but for the little volume its probably not worth it.

When I did my SJ with HD sump check valve I did exactly what McDog suggested with a threaded PVC fitting and was glad I did. I still had to use an expandable test fitting on the inside to keep water out of the tube and getting stuck behind the valve.

 

[catfish4767]

The foam in a can isn't water resistant. Last thing I want is the foam in there soaking up any water if some gets through. Already bought the 2 part fiberfoam kit for $30. Still hesitant to do pvc fitting due to personal preference.

 

[sjetrider]

tell me the size and I will cut you a piece to epoxy in OR
taper grind inside, lay glass from inside best you can then let is set, taper outside and scuff glass that is set and stagger layer glass on outside. Let is set, grind, filler, sand, paint