i've had new impealer installed. by a good mechinic. he water tested in at the shop and carried to the lake and tested it. water pressure was fine and peeing fine. i ran it about 20 miles sence work was done. now it was running and slowly quit. trolled back to trailer. at home with water hose it still overheating. removed pop it valve. turned motor over water was pouring out. replaced pop it vavle. water is come out of the pop it valve hole. very littile to no water comeing out of pee hole. could there be a blockege some where else? all hoses and clamps have been replaced. 91 150merc xr4.