I just finished swapping my standard bravo lower for an imco-2. My question is the tail end of the Imco is shorter than the original merc lower where the cavitation plate would be. So in the area under where the rear anode would be is now open and not sealed. I'm assuming this is the exhaust passage for through the prop but is there a cover or plate that's supposed to cover this? Or is it ok to run it that way?

Ther is a plate that gos there from IMCO, BUT you can run with it open. I'll check & see if i have one,