Davis Whale Tail XL StabilizerThe Davis Whale Tail XL is an aluminum stabilizer and ski boat fin. With this stabilizer, you can improve the performance in any I/O or outboard motor. The Whale Tail XL extends out behind the propeller to utilize prop wash energy which is normally lost. Whale Tail transforms this energy into lift for immediate response when the throttle is applied. The Whale Tail XL also flattens the wake for water skiing, creating positive, skin-free turns. Use the Whale Tail XL year-round in freshwater or saltwater to improve performance of any boat!Features:Unique hydrodynamic designStabilizes bow-light boatsPops skiers up in less timeWith bow lowered, visibility is improved-and safetySmooths out ride in rough waterReduces porpoising and cavitatingIncreases top speed and fuel savings in most applicationsMarine-grade aluminum with durable anodized finishThe Davis Whale Tail XL installs in 15 minutes and includes stainless steel hardware!How to Install a Davis Whale Tail XL StabilizerThe Whale Tail XL mounts on the anti-cavitation plate of all inboard/outboards and outboards.Locate the anti-cavitation plate (the horizontal plate just above the propeller). Slide the whale Tail onto the flat side of the anti-cavitation plate, preferably its underside.Note: Leave no space between the cut out of the Whale Tail and the back of the anti-cavitation plate. On Volvo inboard/outboards, mount Whale Tail on top.Clamp the Whale Tail in place. Using a 1/4″ (6.5 mm) drill bit and the holes in the Whale Tail as a guide, drill four holes through the anti-cavitation plate.On Volvo, drill through the hollow exhaust anti-cavitation plate.Note: if the holes in the Whale Tail do not work on your anti-cavitation plate, drill new holes in the Whale Tail for maximum strength.Insert a 1/4″ (6.5mm) bolt in the hole just drilled, the head of the bolt on the Whale Tail side.Install washer and nut and tighten snugly. Do not over-tighten.On Volvo, longer bolts will be required: 1/4 x 2″ (6.5 mm x 5.4 cm).Click to Download Davis Whale Tail XL Installation InstructionsFrequently Asked QuestionsWhat does the Davis Whale Tail XL Stabilizer do?The Davis Whale Tail XL Stabilizer uses prop wash energy to create lift when the throttle is applied, helping improve boat performance. It can stabilize bow-light boats, reduce porpoising and cavitating, smooth the ride in rough water, and improve visibility by lowering the bow. It can also flatten the wake for water skiing.What boats and motors is the Davis Whale Tail XL designed for?The Davis Whale Tail XL mounts on the anti-cavitation plate of all inboard/outboard and outboard motors. It is designed to improve performance on boats with these motor configurations and can be used year-round in freshwater or saltwater.How is the Davis Whale Tail XL Stabilizer installed?The Whale Tail XL mounts to the anti-cavitation plate above the propeller. Clamp it in position, drill four 1/4-inch holes through the plate using the Whale Tail as a guide, then install the supplied bolts, washers, and nuts. Do not over-tighten the hardware. The product is designed for installation in about 15 minutes.What is the Davis Whale Tail XL made from?The Davis Whale Tail XL is made from marine-grade aluminum with a durable anodized finish. The stabilizer includes stainless steel hardware for installation.Can the Davis Whale Tail XL help with water skiing?Yes. The Davis Whale Tail XL is designed to flatten the wake for water skiing and help skiers get up in less time. Its design uses prop wash energy to create lift for immediate response when the throttle is applied.Are there special installation instructions for Volvo inboard/outboards?Yes. On Volvo inboard/outboards, the Whale Tail XL should be mounted on top of the anti-cavitation plate and drilled through the hollow exhaust anti-cavitation plate. Longer 1/4 x 2-inch bolts are re