We hung a Mercury 400R on a boat the other day and I believe Yamaha has a 425 outboard so all he needs to do is write a check and he can break the record again.
At some point soon I believe he is going to collapse a toon or catch a breeze and flip, the tubes are hollow and a pontoon essentially is a giant wing.
I find the whole racing boat thing very scary. Depending on the boat, at speeds above 60-80 MPH you need enough down force to keep the boat from flying, but not enough to submarine the front. Either outcome seems a tragedy in the making.