I hope this is in the right area, this is my first post on this forum. I recently purchased a 1975 Sea Ray SRV 190 with a 188 Mercruiser 302 and what I think is the earliest generation outdrive. My issue is difficult steering. It turns freely on the trailer and not bad going slowly, but under power it is very difficult to turn the wheel. It has some type if rack and pinion deal under the dash that says it is non servicable. Also, I think there is some type if electric assisted ram mounted to the transom that is supposed to be the power assist part? There is no pump that runs off the engine. Can someone fill me in a little on how these systems work and what these parts are so I can begin to possibly diagnose it? Any assistance would be appreciated.