I have an old (ok, very old) lawn mower with a Briggs and Stratton model 287707 type 0225 engine. I need to replace the spark plug wire since the end (that connects over the plug itself) basically crumbled when I was trying to determine why it won't start. I noticed that the wire goes under the top housing of the engine. I wonder what all screws I have to remove to access the area I need and is it an easy fix?