I'm out of ideas on what is causing my old 025 to badly leak bar oil when running, most of the oil drips out the bottom instead of lubing the chain. The orange plug below muffler is in place. The oil channel on saw is unobstructed. The oil holes on both sides of the bar are open and chain is visible through them. Could it be the mounting plate which looks pretty worn or perhaps the bar? I bought the saw new in 1999 and used it quite a lot.