If you run a cool can on an outboard, it needs to be mounted at the fuel pick up on front of the engine to gain the most. You can easily make a plug in style connection on both ends and run the fuel through. Add this, a dry ice chamber around a 1.5' long velocity tube , just a pipe around a another aluminum pipe with an uncorkable end, and an oxygen injector either at the manifold/carb base, or directly into the velocity stack. We gained 300 RPM from the cool can, another 150 with the velocity stack, and nearly 1000 from the oxygen on a 50 HP Evinrude twin on a 13' Checkmate painted plum ugly.

It gave us a bunch for not alot of money because everything was hand built.

We actualy thought about cheese punching 1/16" holes every inch along the running surface of the bottom and adding a compressed air tank acting like an air hockey table. We never got around to pulling that feat off. I got the idea from John Wayne Janacky after he made his 105 MPH run with a box stock 235 OMC on his Switzer Shooting Star. He thought of it but no one ever implemented it.....Imagine the possibilities