STINGRAY HYDROFOILS Marine Dynamics Starfire-3 Gray Starfire

The ‘no drill’ system is a massive failure. Attached to my outboard per the instructions including correct torque tightness on the screws. First test in the water, it came loose and lost after about 30 seconds. Doesn’t float either so $200 literally at the bottom of the lake. Not happy

I have a 115 hp mercury/mariner outboard. I used a sharpie to draw a line on the trim tab to get it back in the same place. I removed the trim tab and was able to slide it half way on. I than used my hard rubber hammer to pound it on, and had to hit it at least 20 times. Than I installed the set screws which I turned in at least 1/4" after touching the cavitation plates. To make sure I drilled the small holes and screwed it on ( but why i don't know.) I hope I see a benefit , because if it hinders performance I don't know how I'll get it off. Even without screwing it on I have no idea how others fall off maybe the ts other makes of motors.

Depending on your outboard, you may be able to get away with the no-drill install... for me though, there's no way this was a set it and forget it. Going solely with the set screws it was gonna fall off sooner or later, probably sooner.But, it's not a big deal. The best thing about this is you can slap it on and test it out with the set screws and no-drill install to see how to works on your boat. Worst case scenario it does nothing or makes it worse and all you end up with is a few scratches instead of a few holes in your outboard to fill.For me the only thing I really wanted out of this was dropping the nose of my boat (15ft aluminum deep v) before plane speed which for my boat is right around 10mph which was super annoying because almost every lake around me is no wake zoned throughout and 10mph max, so I was at a 30 degree angle almost always nearly having to stand on my seat to see what's in front of me.With this thing, now it's almost flat from 0 to plane, and it's planing at a lower speed which is even better. Haven't tested top end speed but it really doesn't matter to me and just those two things are huge quality of life improvements for my boat.Quick tip if it does work for you and you want the security of drilling and bolting it into place. Take it off and drill through the top first, then put it on and drill through the top hole so you don't have to remove your prop.

Works as expected

You hydrofoil will end up at the bottom of the lake. The forces on the foil are more than you think. Even with the torque tab fin blocking the hydrofoil in place, somehow it still managed to slip off on the first run!