Honda made a 116mph mower https://autos.yahoo.com/blogs/motor...ord-with-its-116-mph-lawnmower-152153168.html
I heard about this on the radio Saturday except the guy calling in rated it @160knots - which I guess is about right conversion wise.... But I was scratching my head as to who the hell measures the speed of a lawnmower in nautical terms? At 116mph It could probably hydroplane for bit....