Drain Plug Removal &/or Repair

Thread starter #1
Hi All:
I just got this 'free' boat and am trying to figure it all out. So far things seem OK to my novice eye but I can not seem to get the drain open. It appears to be brass and well oxidized, located on teh deck near the edge at about the middle of the boat.
I've checked some of the repair websites but haven't seen much on drain plugs.

Any ideas and/or help would be appreciated.