I have a 1990 40hp Johnson that I need to do a rebuild on. I have taken all external components (carbs, contols,etc) off of engine, however I cant get to 1 out of 4 bolts that engine mounts to exhaust housing. It looks like the engine shroud itself is 2 parts that should come off giving me access to these . I'm talking about the part that the cover sits on and locks to. Any help would be great. Thanks