Id loved to buy one of these below that generates DC power fully seal and in and out air circulation
Powered by Kerosene . running DC motors to propelling the boat and also running the complete electrical system .
It would be so quiet and far less chance of problems in a high speed hull of a sail boat


and scale to the boats requirements for power generation add it a yacht like this and it would be a great cruise boat with some ballest removed and add batteries for the weight reduction