I am a little slow so please have someone explain. Is there a difference of HP in a gas engine versis a desiel. So my question is really if I have a 350 HP gas motor and it makes my boat cruise at 22 knots (the boat is a 28x10') will a 250 hp desiel have better performance? I understand the fuel economy will be different in fuel economy but what about cruise speed? If I should replace my gas motor should I look for a desiel with 350 hp or greater?
Thanks in advance.