Alternative fuel for boats?

Question

is there any kind of alternative fuel for boats?

Answer 1

Yes - Use wind power.  It's called a sailboat.

Answer 2

You could probably run bio diesel if you have a diesel. Otherwise not yet.

Answer 3

fattywagons.com they have converted tugboats to wvo.Biodiesel no converting just rubber hoses.However biodiesel is higher than diesel.I convert the engine to run free wvo.

Answer 4

Compressed air power for cars has made news recently.  It might work even better for boats since:

boats move slower, and can stand greater volume without wind resistance problems

water lets an interheater be more efficient.

Answer 5

What kind of boat?  A diesel engine does not work well for a speedboat, but will work well for a yacht.  Diesel engines are low RPM and high torque.  You will need something that will Rev up for a speed boat.