Restoring a 1970s 9.5 Sportwin, good strong engine and all fully serviced except for the cooling system. She's fought me all the way but a new pump has been installed and all went back together....no water flow when running. ( it pumped water with the original impeller ) New pump re tested with a drill and working, water pipe fitted and still pumping water but still nothing when lower leg installed. The pipe itself came out and looks like a dogs hind leg and nothing like the ones on the data sheets and I cant see anywhere where the end should go at the engine base. It does feel snug in one position but still no flow....Do I need to get a new pipe and/or do I need to approach it by removing the engine...