This is a new machine to me and I am doing the first service. Does anyone know what to use to remove the oil drain plug? A 3/8 allen or socket extension is just a little to small. I cannot get in there far enough to see what it is I need. I do know I will be digging a hole in the ground to fit a container to catch the oil, I thought it might be a drain hose. Glad I didn't pull it inside. Thanks in advance......