800KV brushless motor online which is designed for RC boats. A waterproof brushless motor has a maximum voltage of 54V, a 4-stage 12-slot high-torque motor design.
Tips: How to choose the right diameter of brushless RC boat motor?
You want to start with the correct can size (motor diameter) to suit the size and weight of the hull you intend to run.
Here are some basic starting point suggestions for a single motor hull.