Stingray Hydrofoil - Starfire Hydrofoils for 40-300 hp Boats (Black) - No-Drill Engine Stabilizer Fins for Outboard/Outdrive Motors - Made in the USA

Excellent addition to my boat. It is quite easy to install. On my old Mercury outboard, I had to remove the trim tab, slide the hydrofoil on, replace the trim tab and tighten down two screws on the side of the hydrofoil.The difference was noticeable almost instantly. The boat pops right out of the water when you accelerate. There is virtually no rise in the bow as you get up to speed. I've tried it both pulling a tube and without. In both situations the boat's performance was excellent.Three cautions:1. make sure that it is perfectly straight. It's easy to have it off just a bit. It took me a couple times of adjusting the set screws before I got it right.2. Watch the set screws on the side. They need to be really tight. I didn't tighten them enough at first and then had the problem of the foil being off center by the end of the outing.3. Since putting the foil on, the boat pulls to the right. My guess is that I need to adjust the trim, but because I don't have power trim, that's a hassle and I haven't done it yet. It's not enough of a problem make me tinker with it or change my mind about the product, but I do have to keep a hand solidly on the wheel (something you should do anyway).I can't speak to the fuel savings. I don't keep close enough track on my fuel to notice any change. But the product is well worth it even if there isn't any fuel savings. It's hands down the simplest (and most noticeable) improvement I've made to my boat.

Do not buy this thing. It came off during the first time out. It seemed to work when it was on, but came off at high speed. Anyone on the Indian River Lagoon see this let me know. The screws do not hold it in place. The compression is not strong enough. If you are going to get one, get one that has to be drilled through the fin.

this product helped my boat a lot , great hole shot and helped my gas mileage

Fits on a 2020 Mercury 115hp 4 stroke outboard . Will require some modification.*** Cover your prop shaft. Metal shavings will enter the lower unit. ***1) Will not fit directly out of the box . The hole on the bottom will not go over the small fin. You will cut the lower fin to slide over the metal fin on the motor. I used an aluminum bar to mate over the cut . Will not affect performance it's too thin.2) The top will not fit over the lower end hump. Some cutting/notching of the top plastic.3) Cannot use a cordless drill to drill the 2 mounting holes. Propeller must be removed unless you have a 90 degree drill with a short 1/4" drill bit.Screw heads are mounted from the bottom . Nuts on top . Used metal bar from Ace Hardware to mate the lower piece together. Had this on a 2002 Glastron SX170 with 90hp Johnson .

First, the good: it does work. My 21 foot stern drive open bow Hurrincane got onto plane quicker with this installed. Now the bad.....you are going to want to use the install method that does not drill through your stern drive. You will think "yeah, this will work, it looks pretty stout". Your are wrong, and it will fall off. Now, since you took my advice and bought two, you can now bust out your drill and install the second one the right way and bolt it through your sterndrive. This is what I had to do after the first one disappeared in the lake. Read the other reviews and see just how many people lost theirs with the "no holes" installation.

I gave the product a 3⭐️ For ease of install, could of been a five star but I don’t think most folks will have an inch lb torque wrench or red picture, I happen to so it was still easy.I gave it a 3⭐️ For sturdiness, which if I drilled for the install I think it would be a long lasting productIt did work nicely as others suggested, until of course it fell off. It was torqued and loctited to specs, yet last less than two days. $100 down the crapperIf you intend on drilling into your cavitation plate give it a whirl, if your going to “no drill install” stop right now and send 10 people you know $10 each and make a bunch of people happy rather then wasting it on a few mins of pleasure

This product was extremely easy to put on. It helped the boat to get on plane faster. Not a lot but defiantly better. Also the boat remains on plane with less power. That's going to save gas and wear on the outboard. This is well worth the money I am happy with the product.This is also made in the USA. Lifetime warranty.

Install was easy. Worked great , until it didn't, got maybe 6 trips out of it, until it almost fell off. After the first or second trip a piece on each side, Of the under side had broken off near the set screws, on my last trip at the end of the day I noticed that it had almost completely slipped off, leaving gouges on either side of the cavitation plate on my outboard. For this to happen first a large section on the under side of the hydrofoil had to break allowing it to slip past the trim tab/anode on the lower unit. I had high hopes for this item, because it is not a completely rigid material, therefore I assumed that it would have enogh flex to resist breaking. I was wrong.