I'm haiving a really hard time trying to find a page out of a service manual that shows the lower unit of an evinrude motor.  I just need a parts diagram from a 1974 Evinrude 40 HP Norseman model 40454.  The reason is I need to see if the impeller needs the plate and gasket to operate.  When I took mine off there was no gasket or plate there.  I tried to look for it but could'nt find it anywhere.  The only pieces it had was the housing screws and one chewed up impeller.

Nevermind I found the plate.  All I need now is a gasket and some lower unit oil.  The oil in the prop housing now is sooo old and black and stinky it makes me almost gag.  The smell is so pungent   .  Have any of you smelled oil this bad before?  It smells almost like burned gears and a rotten dead skunk in a dirty toilet bowl.  blaahhhh I can't even think about it right now but someones gotta change that oil out. :-/