I have a 175hp Mercury 1981 on a Ranger 375V and found a 1990 200hp Black Max for a good price. Will the controls hook up from the 175hp or will I need a different control set up? Is there a way that I can check compression on it without controls as it is not on a boa a the resent time, Owner said it was running when taken off. Fr the price I think I could part it out and not loose any money either way.