Hi, I recently changed my freshwater holding tank on my boat. It is powered by a 3 year old Jabsco par max (gpm 4) washdown pump. After hooking everything up, I noticed the water stream is not nearly as powerful as it used to be. More than a trickle , but not like it was before. I didn't significantly alter the length of any hoses and I can't see any obvious kinks in the hoses. Does the pump need to be primed, any ideas??