" Our 1999 15 HP Suzuki no longer sprays water out of the pilot water hole so we're not sure the cooling system is working properly. The motor was purchased last year and has about 40 hours on it, and is run in turbid backwater lakes on the Mississippi River. We've flushed the system using a flushing attachment more than once but still no water comes out of the pilot water hole. The water intake is not blocked. We've inspected the impeller and it is still like new. Could we have a water pump problem already or could there be blockage higher in the cooling system, and how do we go about inspecting that? "