I have a Fletcher GTO Bravo 17ft with a Mercury inline 1350 outboard. It has a 18p x 13 stainless prop. The skeg is pretty knackered and was that way when I bought the boat.<br /><br />It does a top speed of 47mph....<br /><br />When cruising along at any speed over 30mph it seems to sway side to side at the back. If i try to turn it gets worse and it feels like a snaking trailer. <br /><br />If I trim my engine down it turns violently right if i trim it up I have to steer to the right to keep it from going left!!!<br /><br />Whats going on here? Is it my skeg or something else. When trimmed right out if I was to let the steering wheel go it would turn left violently...<br /><br />I have been told that a skeg doesn't really serve any purpose, is this true?<br /><br />Advice appreciated....<br /><br />Stan