F_R is correct above. A pulse fuel pump like what's on most older Johnson and Evinrudes would be the best type set up. And If I am not mistaken, some of those pumps have a tube that supplies the pulse from the engine and not just bolted up to an opening port. And since those pumps are small in size, you maybe could even manufacture a bracket to fit it to the engine under the cowling. Do a search for such pumps and see. JMHO