Went out to cut some trees in back of the house and the chain seems very dry. Went up to a clean piece of wood and rev'ed it but it didn't seem to throw any oil out. Took the bar off and there is oil under the bar on the case but it doesn't seem to be getting to the little hole that lines up with the bar. The oil hole is clear, I even put a new bar on that I had still nothing. Anything I should try before I take it up to the dealer? Its a Stihl 290, maybe 3-4 years old always worked fine up until now.