So the throttle lever drivers side, their is a screw with a black let's call it a plastic bushing,well it broke in half and I've tried using washers but the screw wont stay and the boat bogs down. Would anyone know where I could locate this plastic piece? I'm in Colorado and everybody here wants to sell me a new throttle witch I'm told has to be retro fitted?! Any help here would be appreciated! Thx!