https://www.ebay.com/sch/i.html?_nkw=Davis+Happy+Troller+Large+Trolling+Plate+F+Io+S+All+Outboards+50Hp+Lar&_sacat=0&_dmd=2

Davis Happy Troller Large Trolling Plate F/Io'S + All Outboards 50Hp & Lar

Regular price
$136.00
Sale price
$87.00

Happy Troller - Large Plate Large Troller: Fits inboard/outboards plus all outboard motors 50 hp and larger. For the Fisherman who thinks he has everything! Slows even big motors down to that "ever-so-slow" fish tantalizing speed. A significant invention in the sport of troll fishing, Happy Troller® mounts on the anti-cavitation plate to allow fine control of trolling speed. At cruising speed, your boat's stability is enhanced. Locks in "down" position for trolling. Locks in "up" position fo