The inside of this engine looked nearly new. The drain hole in the breather compartment was completely open. I understand the function of the screen now that you have explained it. The way it is shown in the picture the opening to the breather tube is unobstructed as you said and the screen also is not over the drain hole. I have unfolded the screen and re-folded it trying to make it wider so it would fit more snugly in the vertical slot. But the screen still does not fit snugly. I wonder if the screen could move on its own over time and end up blocking the opening to the breather tube?
