"The manual says to remove pro
"The manual says to remove propeller and put in a tank and run for several minutes.
Unfortunately, that will not unplug your system.
The first thing to try...while the motor is running, blow some compressed air into the water check hole just below the powerhead at the top of the vertical shaft.
I can not remember is there is only one hole or two or three. Blow into all of them or cover all but the one you blow into.
A couple shots of air hopefully will break things loose.
If you do not have compressed air handy, maybe try to use a garden hose with a nozzle on high pressure up against the holes."