Hello all, I have tried to seach the forums and apologize if this has already been answered. <br /><br />I have a 1970? 15ft Starcraft with an older Mercury 50hp longshaft. Once I hit top speed water is "sucked" up between the engine and the tramsom. I believe that my transom height is about 18 inches. <br /><br />I have tried trimming the motor and have had no success. <br /><br />Does anyone have any ideas, do I need to go to a short shaft, if so is there a conversion kit avaliable?<br /><br />Thanks in advance for any help.<br /><br />-Eric