recently purchased 1982 Larsen 16' power boat w/ evinrude 90hp. steering has almost seized. has push-pull steering through tube. detemined that the prob lies in the mechanism within the tube...problem is not sure what should be repaired/cleaned/replaced....right now the only thing i can see is that the engine has to be removed to get the "insides" out....anyone knows what i'm talking about....i would appreciate the info...thanks