Davis Instruments Hydrofoils & Trolling Plates
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When it comes to enhancing outboard motor performance on the water, Davis Instruments has built a reputation for engineering solutions that deliver measurable results. The company's hydrofoils and trolling plates represent decades of innovation focused on solving real-world boating challenges, from planing efficiency to precise trolling speed control.
The Legendary Doel-Fin Hydrofoil
The Doel-Fin is the original hydrofoil developed by an aeronautical engineer to improve overall performance on boats with outboard motors or outdrive units. Molded in two pieces of guaranteed unbreakable, high-strength plastic, each foil is designed to flex independently to absorb shock. This thoughtful design approach translates into a comprehensive suite of performance improvements that boaters notice immediately on the water.
The positive effects include greater stability, consistent planing at lower RPM, faster out-of-the-hole performance, steadier turns, higher top-end speeds and lower bow rise at all speeds. Whether you're running a small fishing boat or a larger recreational vessel, the Doel-Fin's aeronautical engineering heritage means it addresses multiple performance parameters simultaneously rather than optimizing for just one characteristic.
Happy Troller: Precision Speed Control
For anglers and those who need precise low-speed maneuvering, Davis Instruments offers the Happy Troller trolling plate system. The Happy Troller mounts on the anti-cavitation plate to allow fine control of trolling speed, while enhancing your boat's stability at cruising speed for a smoother ride in rough water, reduced porpoising and cavitation. It's suitable for year-round use in all boating activities and made of highest quality stainless steel and marine aluminum.
Built for the Marine Environment
Davis boating products improve boat performance, control trolling speed, prevent shock to lines and anchor chains at dock, and more. The company's focus on durability means these components are engineered to withstand the harsh marine environment—UV exposure, saltwater corrosion, and the mechanical stresses of constant use. Each product reflects Davis Instruments' commitment to providing practical, reliable solutions that enhance both the performance and enjoyment of time on the water, whether you're fishing in freshwater lakes or navigating coastal waters.