Freshwater flushout leaking

[coppage54]

The freshwater flushout on my 2002 85 hp 4 stroke leakes when motor is runnung. I have replaced the washer several times. It does not leak when a water hose is attached. There seems to be a lot of pressure at the hose connection when you are running at speed and the water leaking out is warm. There is a chalky white film at the bottom of the shaft that the motor rotates on to turn. I have never noticed this before. Could a gasket have failed in the motor causing the back pressure on the flushout and overheating the motor causing the white film.

[boats.net]

May be problem with fitting that flush hose connects to to prevent it from sealing properly. Might check pressure control valve on engine to see if stuck shut.