This was strictly prop, jet, surface pericing.. I think when the article was written gas diesel was really only option.... I would like to understand better why electric can usually be sized smaller hp.... I understand its torque, but in vehicles most engines on the road are almost never putting out rated Hp and if so for a very short time. Marine is kinda different, at least the high speed stuff. I am not so sure at high speed hp specs will change much, gas or electric.