I'm looking at a boat that has a 90 HP yamaha on it. The owner got it used and doesn't know the year model. How do I tell what year it is? Also the steering cable is frozen up(won't turn), can this be loosened or just replaced, about what would that cost if I did it myself? It has been is salt water, are there any engine anodes that need to be replaced and where are they to look at? Anything else I should know about a 90 yamaha-I'm guessing a early 90's model. Thanks guys.