Stingray Junior Hydrofoil Boat Stabilizer The Stringray Junior Hydrofoil was designed to satisfy the market demand for a versatile hydrofoil capable of fitting engine sizes as small as 9.9 HP that are found on inflatables, smaller tenders, and jon boats. The Stringray Junior provides smaller boats with small engines the ability to get on plane quicker and experience the performance benefits of a hydrofoil stabilizer. Its high-tech shape directs water over the surface to create just the right lif