Here wre some calculations on how I calculated hull speed ,power and fork and prop speed what do you think?

https://youtu.be/FvGr-QJ6FGQ

If anyone's interested please take a look and tell me what you think using this little motor that runs at such a high RPM I'm thinking that I'm over with larger coils and slower speed would give me more of a mechanical advantage and allow the motor to not rev so high which contributes to the sound being loud and annoying.

https://youtu.be/FvGr-QJ6FGQ

This will be my third year running the 1800 watt Chinese motor go-kart kit on my home build 22 ft sharpie sailboat. Though it works pretty good I'm wondering if a motor with larger diameter coils would allow me to have higher torque and run at a lower speed. I'm thinking This would improve the sound quality on the boat and hopefully improve efficiency through a mechanical leverage from the larger diameter. Currently I'm running late timing belt and a bit of a unique way of attaching the motor to the shaft.