DAVIS INSTRUMENTS Large Happy Troller Fits Inboard Plus All Outboard 50 HP and up

Reduces troll speed in "down" position. acts as a stabilizer in "up" position Maintains stability in bow-light boats Smooths out ride in rough water Reduces porpoising and cavitation Made of only highest quality stainless steel and marine aluminum. clear anodized aluminum finish Installs in 15-minutes Stainless steel mounting hardware and installation and operating instructions provided with each unit.