[JimsCAL]

I suspect the "faucet" you refer to is a valve. Rust says its not bronze and needs to be replaced. Need those pics to help.

 

[JimsCAL]

As I suspected, your "faucet" was a valve. And a gate valve which doesn't belong on a boat.

Gladrags advice is right on. Redo the whole thing. If the outlet is above the waterline, you can get away without a seacock. But not a bad idea to put one in while you are redoing everything.