I went for a ride in my friends boat with the 2004 Yamaha 200HP OX66 and it was didn't handle well in the turns with the prop feeling like it was over revving. I don't think it's a spun prop. I noticed he didn't have a rudder type anode on the lower unit above the prop like every OB I've owned. It did have a slightly convex one in the spot where my rudder anode is and it had the "dial" marked above. I don't know what purpose the "dial" would have if there wasn't a rudder type anode. Am I correct he needs the rudder type?