Strange looking electric kicker

[Cuba Libre]

Can anyone explain how this electric motor that is on the leg of the Merc works?
http://eugene.craigslist.org/bod/3364539620.html

 

[gungadin]

Here is a writeup for you.

http://www.minnkotamotors.com/_ui/sramk08/tpl/sramk_nohero_banner_pressrelease_single.aspx?id=3109

 

[Cuba Libre]

Thanks for that gungadin.. Wonder what sort of run time there is on one battery?