On Sun, 29 Jun 2008 07:53:52 -0400, "Ernest Scribbler"
wrote:

"Short Wave Sportfishing" wrote
For starters, that's not your anode - that's your trim tab and it's
missing.

Not all boats need that little fin to go straight.
The OP's looks like the first item on this page to me:
http://www.mercstuff.com/zinctrimtabs.htm

Well I'll be danged - I didn't know that.

Thanks.