Deck drains underwater

[Joek]

I am considering purchasing a 246 ccp 1981 with 2000 Yamaha 225 ox66. But what concerns me is the deck drains to scuppers that are underwater. Is the normal? Also the deck drains in the corners of the boat are constantly filled because the deck is at water level. Just wondering what you guys think

[declansdaddy]

My sea swirl striper is the same way although my deck is above the waterline and hoses carry the water to the scuppers.  Sounds strange that your deck and scuppers are level.

[jdupree]

That is normal to a certain extent.  If you have a couple of folks in the back it will cause some water to come up through the scuppers.  One person in the rear should not usually cause them to go below the waterline. 

If that is the case, you might have some water logged issues with the CCP.  Is the deck and transom solid?  Are the batteries located in the rear or under the console?  Weight of the OX66 should not be a problem considering that hull is rated for 280hp.

Some pictures might help if you have them.

[Capt. Bob]

This is a pic showing (somewhat) the relationship between the deck drain (to the right of the aluminum backing plate) and the thru hull. The hose is attached to a 90 degree fitting on the bottom of the drain. The elevation difference isn't much but it basically works.



Water would enter the drain when launching from a steep ramp therefore I used plugs in the deck drain to stop the water. At rest you could see water in the drain itself as the thru hull was below the surface. I inserted the expandable type plugs prior to launch and left them in place for the day. When diving, we would get water on the deck and would remove the plugs when moving to a new spot. The water would drain while underway and then I would re-insert the plugs before coming off plane. Worked well for me. When fishing, they stayed in place continuously.

Good luck.

[neal]

I have a 16' Tournament Cat and this was a problem. I put check valves in the line, plus inspect the rubber flappers on the hull penetration (they are supposed to act as check valves but wear out, wrong size, missing- the usual. Hyman Rickover "You get what you inspect, not what you expect". I understand the self bailing function when up to speed but always that it was a strange design. Like in the above pic a 90 degree pvc check valve would work well.