OK..now THAT's an outboard motor!
...and try four of them.
http://www.seven-marine.com/news/quad-557s-in-action
...and try four of them.
http://www.seven-marine.com/news/quad-557s-in-action
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is that thing Turbo Charged ?
NM Supercharged
Wonder how they set up the prop counter-rotation with 4 side by side?