My steering wheel is very loose. I thought it was the actual wheel and went to tighten the bolt in the center of the wheel. That is not the problem. It appears that the shaft? that the steering wheel sits on is very loose. Is there anyway to tighten this? Not sure if it matters or not, but the wheel/shaft has a tilt adjustment.
if it is a cable steering, there is an allen head screw that holds the tilt part in place, pull the wheek off, pull the boot off, then check all the fasteners. The screww is in one of the universal joints of the shaft. If its hydraulic, have it bled and checked for leaks
If it tilts it probably is hydraulic. My old boat had a bearing under the bolt that made it loose. I had to replace it. It kind of wobbled so to speak but would turn fine. It was a seastar wheel.