Do you have any trouble steering? I have a 1648 front seat cockpit lever steering boat and at high speeds it turns hard to the left. If I manually trim up my motor It steers hard to the right at high speeds. I need to get a new trim tab anode and think that might help some. I also saw a video of a salesman saying all lever steer boats steer hard to the left and having power trim you can trim up or down to try counter act what direction you want to turn.
