For the fisherman who thinks he has everything! For use in fresh and saltwater, the Happy Troller slows even big motors down to that "ever-so-slow" speed that tantalizes fish. A significant invention in the sport of troll fishing, Happy Troller mounts on the anti-cavitation plate in just minutes to allow fine control of trolling speed. At cruising speed, your boat's stability is enhanced for a smoother ride. Happy Troller is manufactured from the highest quality stainless steel and aluminum and features a clear, anodized finish. Fits outboard motors from 20HP to 50HP. Includes stainless steel mounting hardware and operating instructions.