Re: Mercury Hi Thrust Engine???
Yes, the H is for hand or tiller controls, as opposed to remote controls. <br /><br />Are we talking about the current model year? 2003?<br /><br />According to the Mercury web site product info, the 15hp has a 2.00 gear ratio, while the 20 and 25 hp have a 2.25 ratio, giving it a bit more thrust.