OK, This is really getting out of control. ReGen Nautic has manufactured a 180 HP Electric outboard. Take a look at their web page. It's pretty incredible. The imbedded video on the page is not bad. However, you'll need to select to view it at full-screen. http://regennautic.com/products/e200-outboard/
Additional Video on You tube - Towing a water skier. http://www.youtube.com/watch?v=VmmKf5eIu_g
Don't think you'll need a dual motor setup with this one!