I have a Murray 5725 lawnmower with the 8hp Tecumseh TVM195-150269E engine. Had a compression issue and now i am trying to check the valves out. Took the valve cover off and removed the breather element and breather body and am now looking at another cover of some kind with a tab looking thing attached. Not sure what this is since it does not appear to show up on the engine diagram. Don't want to break it but don't really see how to remove it. Any help would be appreciated.