try to find a steering whell clamp it keeps the wheel form turning .
the best way is to use a auto pilot . pretty pricey for a good one .
i used to have a commercail boat and i made a spring clamp from a cheap clamp that wood workers use and attached to the right side of the wheel and mouted to a ram ball mount to the wall of the pilot house .
i woud get the boat tracking and then just clamp the wheel . still need to adjust for wind and current . good luck