A little background.. The hose connection is a "Backflush" system. Meaning that the water runs backwards and not through all the same passages as the normal cooling water which is supplied by the jet pump. There is an elbow that gets plugged often and stops the normal flow of the water from exiting the "pisser".. I believe that in most cases, if you follow from the hose connection you will come to a T or an Elbow that is a shared connection from the Back flush and the normal cooling water. Remove it and clean it.