So I currently own a 9.9 evinrude with this 12 ft rowboat. I've put a lot of work into the motor and I still can't get over 10mph. There are many videos on youtube of guys getting to 20-25mph with the same motor on 12 ft boats. Here is one such video
https://youtu.be/M_OZ4Qa7H9g
I've been...