I have a 1992 Kawasaki 750 SS jet ski. My friend took it over a very shallow muddy sandy area and ever since i can go only about planing speed. After that the motor just revs and I get no forward propulsion, just loud reving. There is nothing visibly wrong with the impeller area, ie, nothing stuck anywhere that i can see externally. So I assume that something internal has to be cleaned/unclogged. WHAT DO I UNCLOGG HERE???? The jet ski is in a pretty remote place and I have to do this myself, I am very handy. Thanks so much!!!