Stingray Junior Hydrofoil Boat Stabilizer for 9.9-40 HP Outboard and Outdrive Engines, Black

The Stingray Junior Hydrofoil Boat Stabilizer (JR2-1) is a cavitation-plate-mounted hydrofoil built for smaller boats and engines, fitting outboard and outdrive motors from 9.9 to 40 HP. It is designed for inflatables, smaller tenders, and jon boats that run engines too small for Stingray's larger hydrofoil models. The high-tech wing shape directs water flow over its surface to generate the right amount of lift for a small engine, helping the boat get on plane quicker and stay on plane at lower speeds.

Beyond lift, the wings on the Stingray Junior also stabilize the boat side-to-side, cutting down on rocking. This reduces chinewalking, porpoising, cavitation, and ventilation, which in turn improves fuel economy, control, and overall ride quality. It also increases visibility at low speeds, which adds a margin of safety.

The Stingray Junior comes pre-assembled as a single black unit and includes all mounting hardware: four bolts, four self-locking nuts, and four rubber washers. Installation requires drilling four holes through the cavitation plate, using the pre-drilled holes in the hydrofoil as a guide. For boats with narrower cavitation plates, the hydrofoil can be separated into two pieces at a rear screw and shortened in 1/4 inch increments on each side to achieve a proper fit; both sides must be cut the same number of times.

Specifications

• Brand: Stingray Hydrofoils
• Manufacturer Part Number: JR2-1
• HP Range: 9.9 to 40 HP
• Lift Level: Average
• Color: Black
• Material: Polypropylene (PP)
• Dimensions: 18 inches long x 16 inches wide
• Weight: 1.75 pounds
• Installation Type: 4-Hole Drill Installation
• Included Hardware: 4 bolts, 4 self-locking nuts, 4 rubber washers
• Adjustable Width: Yes, in 1/4 inch increments per side
• UPC: 096144006206

Frequently Asked Questions

What engine sizes does the Stingray Junior Hydrofoil fit? The Stingray Junior Hydrofoil (JR2-1) is designed for outboard and outdrive engines from 9.9 to 40 HP, making it suited to inflatables, smaller tenders, and jon boats.

Is the JR2-1 hydrofoil black or another color? This Stingray Junior Hydrofoil is black.

How is the Stingray Junior Hydrofoil installed? Installation requires drilling four 1/4 inch holes through the cavitation plate, using the pre-drilled holes in the JR2-1 hydrofoil as a guide, then bolting it on with the included four bolts, four self-locking nuts, and four rubber washers.

Does the Stingray Junior Hydrofoil come with mounting hardware? Yes, the JR2-1 includes four bolts, four self-locking nuts, and four rubber washers, so no separate hardware purchase is needed.

Can the hydrofoil be resized for a smaller cavitation plate? The Stingray Junior can be separated into two pieces at a rear screw and shortened in 1/4 inch increments to better fit smaller cavitation plate widths; both pieces should be cut the same number of times for a proper fit. Not every installation needs this step.

What size is the Stingray Junior Hydrofoil? The JR2-1 hydrofoil measures 18 inches long by 16 inches wide and weighs 1.75 pounds.

What material is the Stingray Junior Hydrofoil made from? It is made from polypropylene (PP).

What problems does the Stingray Junior Hydrofoil address? It reduces chinewalking, porpoising, cavitation, and ventilation, while helping a boat get on plane quicker and stay on plane at lower speeds.

Does the hydrofoil improve fuel economy? Yes, by helping the boat reach and hold plane more efficiently at lower speeds, the Stingray Junior Hydrofoil improves fuel economy along with stability and control.

Does the JR2-1 come pre-assembled? The Stingray Junior Hydrofoil comes pre-assembled as one unit and can be adjusted to fit a smaller engine size by cutting it down at its center screw.

How does the Stingray Junior compare to Stingray's larger hydrofoil models? The Stingray Junior (JR2-1) is built for smaller 9.9-40 HP engines with a 4-hole drill installation, unlike Stingray's XR4 model which covers 40-300 HP engines with a 2-bolt installation, or the no-drill Hyperfoil 500 and Starfire models built for 4-300 HP and 40-300 HP engines respectively.

What should I do if the hydrofoil interferes with the propeller? Before operating the boat with the Stingray Junior Hydrofoil installed, slowly turn the propeller by hand to confirm there is no interference between the hydrofoil and the propeller.