Hello, I am a newbie. I have a 1989 Mercury 80 HP outboard. I had the impeller replaced at the end of last season. I am noticing that the water pressure coming out is not very powerful. No overheating beep is sounding. Engine is running well. Am I possibly doing damage by running it this way? I will not be doing repairs myself-what could I expect as far as problems? Only thing noticable is a slight oil leak.<br /><br />thanks in advance,