I have an 89 I/O Mercruiser/Alpha One RAVEN (only made I think one year). I bought this boat in Aug. of 2004. The boat runs great, but I noticed the last couple of runs before pulling out of the water that the steering started to stiffen up bad. It only does it when I am going slow though. Do you think it would be the power steering pump? What else could it be other than that. Also round about what do steering pumps cost, and would it be pretty simple to install. Thanks for your help!