I hope it all works out, but................. Im with Chris F, the kv is way too high for this heavy old girl, you need the torque to get it rolling, lower revs, and lower kv I hope Im proved wrong, but I own the evidence., I was reluctant to spoil the party, but you still might be able to get a return if the motor is still unused. the prop ypu are thinking abolut will be too big, its the size I run with sub 1000kv, and I get about 15 mins max with throttle management
Those high kv motors suit the lightweight racing fibreglass style hulls, not the heavy thick wood things we own.
I run mine on 6 cells, gps is 25mph, after that, its extremely unstable on single screw, the build log was recently revived with some posts, take a look if its any good to you to help out
https://www.youtube.com/watch?v=t4OQbqIByw0