I am still only getting steam from the telltale even though I changed the impeller. I put a hose on water tube in the leg & it came out the telltale, I also held the lower drive in water whilst turning the driveshaft with a drill, water coming out of the pump top as expected although not a strong squirting mind. I had water coming out of the telltail once & thought it was sorted but only once, had both water jackets off & they were clear, what else do I beed to do,