My Merc 9.8 doesn't pump water. I'm attempting to change the pump / impeller but have run into a little road block. Yes --- I know i Should get a manual, but at $100 is a little out of my budget. I've attached a picture that hopefully will help. Hole "A" measures approx. 1/2 dia by 2" deep and looks to be lined with a plastic sleeve. The end of the sleeve looks torn or ripped and when I put liquid thru it it runs out the water intake. I really can't see what this port does as when the cover is on it looks like its blocked anyways. Hole "B" is the fresh water rinse and when liquid is poured thru it it also exits at the water intake. So how do I get to the impeller to check / change it? Any help would be appreciated.