Happy troller-small plate 20-50hp from small troller outboard fisherman joined herself. But the speed of a big motor can be down! "Ever-so-slow " fish run at an attractive speed. Invented big happy sports troll fishing troller anti-cavitation plate mount These fine control trolling speeds are performed at the trolling speed. Increases cruising speed and boat stability. Trolling lock position in "stop" position Lock cruising with "UP" position. Suitable for Happy troller or running at the correct trolling speed. All boat activities need salt and fresh water to use all year round. Place the key and speed troll in the "down" position. Can be used as a maximum stable position. Bow-light keeps boat stable Rough water accumulated due to the smooth out of the ride. Reduces occupation and cavitation Only made of the highest quality stainless steel with a MARINE aluminum clear anodized finish. Installs in 15 minutes. Stainless steel mounting hardware and installation and operating instructions for each unit