Hey I'm new to the site.  Does anyone know anything about Hydro foils for small outboards like 10hp size are they worth it to prevent porpoising in small boats? I have a BassTender 10.6 and recently bought a 9.8 hp Tonhatsu 4 stroke Outboard. I'm am wondering if these things help or are they a waist of money. ???

I put one on a 40 hp. It seems to help alot on both slow and fast take offs.  It goes up on plane alot quicker and controls the bow lift pretty well.  The main reason I tried one was my prop would wash out alot.  It pretty much stopped that problem.  I think my boat handles alot better, with it on.  It might help if you can get the motor trimmed right.  

I had an old Evinrude 20 hp that had one on it.It was a smooth ride.

I HAVE A SE SPORT ON MY 90HP MERCURY ON A 17' TRACKER TARGA DEEP V WORKS GREAT.