HI, i have aquired a 1970 9.5 hp evinrude sportwin model #9022a. I have replaced the thermostat & impeller with new ones. My concern is that there is no stream coming from the peehole,it's just a sort of steamy spray.I have been told that these early models didn't have a steady stream of water.Is this correct?I made sure that the water tube connected properly when i replaced the lower unit.The water will stream with muffs on but not when tested in a tank.All help will be appreciated...