you prob have fixed the water thing already , I had same problem hooked the muffs to hot water faucet . instant cure . cold water well broken in engine. thermostat!! lots of luck
when you replaced the impeller if it was round with no flanges pieces could be jammed so where you can take the tell tale of run some coat hanger through it and take your hose and run it back into the motor a backflush and if you have a thermostat to much pressure will blow it so start slow until you hear the water making it's way through motor and out the lower unit
just thought id add a penny to the kiddy,I keep a 3ft peice of weed eater string wrapped around one of my plug wires to unclog the tale tale for the pest nest in there and it woks for me !!
