When an outboard dribbles water instead of a strong stream one of the first things we do is to insert a thin rod in the outlet to see if it is clogged. If you do it while the motor is not runing you are wasting your time..Here is a very simple way to correct the problem. run the motor in idle and reach over and put a finger over the outlet hole. keep it there for 20 seconds...let go...repeat the process at least six times or until the water stream gets stronger...now rev it up in neutral and repeat the process. Hold that water in. while it builds up pressure. If you have a small kicker that does not rev up in neutral..make sure your dock lines are tight and shift it into forward gear and rev it up. repeat this several times even after the flow gets stronger...bingo...you have just found out it is not your water pump that is the cause and the blockage is cleared. As long as you have a strong stream your pump is working and does not need to be replaced. But if this fails to solve the problem call an engine tech. You have a paperweight.