searching for a hatch

Why not use a waterproof through deck connection?

 

I've used a clam shell in the past to route the wire below deck.
http://www.westmarine.com/webapp/wcs/stores/servlet/SiteSearch

 

http://www.iboats.com/Watertight-Deck-Connections/dm/view_id.237849

Standard fitting available at most marine hardware stores.
Avoid the chrome plated zinc or zamak ones.

 

Here's a link to what I think is the best Plug for a trolling motor. I've had it for about a year now and no problems. I have had all the other and they corroded and failed in less than a year.

http://batterytender.com/accessories/battery-connector-black.html

 

David, Here's a pic of the Battery Tender plug on my 15T, If you decide to go with it I have a couple of tips to make it bullet proof.

Bob

 

You can buy direct from Battery Tender.

Here's what I did to make it bullet proof.
1. For the below deck terminals I coated with many coats of liquid electrical tape.
2. Added Oring to male portion of plug to keep any deck wash water out of the plug.
3. Coated terminals on male plug with many coats of liquid electrical tape then filled cavity with urethane caulk, (silicon caulk and salt water make hydrochloric acid).

It's been on the boat for over a year and no signs of corrosion.

BTW did you ever get the specs on you're prop for me?

Thanks
Ran out of KB's , pics on next post
Bob

 

Part II here's the pics

 

Powerwinch Plug.
http://t0.gstatic.com/images?q=tbn:XKQU6ikQNxtXRM:http://www.pleasureboatmarine.com/stores/images/images_775/Power%2520Winch%25207810500AJ_sm.jpg