STINGRAY HYDROFOILSMarine Dynamics Hydrofoil Speed Xp Junior Sting Ray, Gray

I installed this on my 2017 25hp Yamaha Four stroke. It is on a Tracker Grizzly 1448 All Welded boat, modified V hull. Total weight, boat, motor, battery, 6 gallons and me of around a 1000 lbs. 9 3/4 x 10 pitch prop. Prior to install it took several seconds and a couple hundred of feet to get on plane wide open. 3/4 throttle to stay on plane. After install it jumped on plane, 50 feet or less and stayed on plane easily at half throttle. I tried half throttle max from a dead stop and it still got on plane easily, just took a little longer. I noted some increase in fuel efficiency but my Yamaha is new, less than 10 hours, and is still using more gas than a broken in motor. Even with that in the equation I got at least a 25% increase in efficiency. And I was zooming around full throttle a lot too. I noted little to no difference in top end speed, around 26 mph before and after. The boat was also much easier to steer (tiller handle) with the stingray. Without it, I was getting about half the boat length on plane. With it, I have about 18 inches in contact with the water at 3/4 throttle and less at full throttle. I did have to adjust the trim of the motor after installing the stingray. Trimmed out to be specific, one hole, which equals 4 degrees. The resulting bow lift made a huge difference for the better. To sum it up, these things are ugly, but they work really well !

Installed on a friends dinghy that was having planing issues. This solve the problem. Easy install

Keeps me on step from the start.

Says adjustable for smaller motors, however it doesn’t fit my tohatsu 9.8. Seems like a quality product but wasted my money.

Worked well on our 88 Evinrude hubby did modify some.

I put on 35 hp motor pushing a 16 foot alum v-haul. Put boat on plane as soon as I gave power. The fin made well, but the mounting hardware weak. Bolts broke trying to go into locking ring. I used other bolts.

this hydrofoil was easy to install and fit my 25 hp yamaha motor perfectly

Made a huge difference got on plane much faster!