Hey guys. I have a 2001 small 5hp 2 stroke Mercury that I use on my jon boat. With two people, and some gear, we GPS'd it at 14.6 MPH top speed after finding the best slot on the manual trim. Once it reaches 14.6 it feels as if the prop starts to spin out. It stays at 14.6 but the throttle isn't all the way. Once it gets there, if you give it more throttle it just revs high and doesn't move any faster. It feels as if it should go more, but doesn't. Would a different prop help out? I don't know anything about propellers. Where we set the trim at now it gets the most top speed, but not the quickest take off. On different settings it was taking off quicker out of the hole, but it would top out at 11 mph.