After reading a bunch of opinions about hydrofoils on this site, I decided to go ahead and install one on my motor (stingray). I have a 16' Mark Twain with a '63 75 hp Johnson. I don't know if anyone has had any experience with this particular motor with a hydrofoil, but the way it is shaped around the cavitation plate I actually had to rig it with some washers to actually raise the hydrofoil about 1/2 inch from the cavitation plate. In order to get it to fit on there decently. <br />When I put the boat on the water I was really surprised at how the boat got on plane emmediatly, even with three grown adults on it. Before it would have taken forever. But unforunatly the speed was terrible. Now too much of the boat is in the water when on plane (wayy too much). And when one of the adults moved while the boat was moving, it fished-tailed and scared the heck out of averyone.<br />Can I mess with the angle of the foil to get the desired results? Any feed-back would be greatly appreciated.<br /><br />Thanks... 