I just tried changing the impeller on my 1975 9.8HP motor. When I took the water pump cover off the drive shaft I noticed a black rubber washer fell off. I didn't pay attention to where that washer came from. Can someone help me figure where this washer go to? My guess is the washer goes on top of the water pump cover but does it just sit on top of the cover with nothing holding it down, if so what is the purpose of this washer?<br /><br />Another question is where is the anode plate for this motor? I can't seem to find it.