Whats is this and why is it leaking?

[imp0ster]

I cannot find it in any schematic and I can't see far enough into the boat to find out what the hell it does! If I plug the boat and fill it with about 15 gallors of water, the water comes out of this deck fitting and for the life of me I don't know why it's there!!!

When I come back in from a day of boating there is about 45-50 gallons of water inside the boat!

[imp0ster]

Nobody knows? It's not exhaust or bilge pump... Can I glass over this hole?

[tom976]

Not sure how this refers to yamaha outboard parts....

Why not just put the hose to it and see where it comes out when its out of the water?

[99yam40]

post another pic a little farther away this time so we can tell where this plug is located.
Why not put a removable plug in it just like the the normal drains in boats?

Could it be a drain from a live well?