Buy a 700KV brushless motor online which is designed for RC boats. A waterproof brushless motor has 42V Max voltage, 7530W Max power and 175A Max amps. Powerful 700KV brushless motor is made of high-quality aluminum alloy with the latest CNC milling machines and designed with high power to provide a longer run time for RC boat.
Model: ATO-SP-056112-10Rotational Speed: 700KVMaximum Current: 175AMaximum Voltage: 42VMaximum Power: 7350W
Length: 112mmDiameter: 56mmWinding Type: DELTANumber of Turns: 4DNo-load Current: 2.2A
Max Seed: 30000KVNumber of Rotor Stages: 4Shaft: 10mmWeight: 1040g
Tips: Do you need to break in a brushless RC motor?
No need to break in a brushless motor. Brushed motors people used to break them in to get the comm brushes to match up with the commutator and also to break in bushings if the motor didn't have bearings. Again, nothing is needed except for oil in the bearings for a brushless motor.