Specifics on this saw: manufactured 05/27/08; 46 cc; 18" bar. I have found no parts list or diagrams for it; would appreciate suggestions on that. It's the only chain saw I've ever owned, and I'm attempting a repair for the first time. The thing has a serious oil leak, and I've removed several parts in search of the oil pump. I'm hesitant to tear it apart any further without a diagram or some expert advice.