After rebuilding the lower unit on my 1983 25hp the stream is intermittant. I replaced the impellor as directed in the manual. It seems the stream starts when the engine gets warm then as the water coming out of the engine cools down the stream stops. I have had this engine for a long time and don't recall the on and of cycle like this. Is there a thermostat or is the impellor in wrong? As you probably know taking the lower unit off on this model is a bit of a pain. But if I must....
