My stihl 180 stopped oiling a few weeks ago so I stripped the whole thing as far as I could, proded it with wire and flushed the tank with petrol. When I put it back together the blockage had cleared but now there seams to be too much oil. It doesn't have an adjuster! I can only think I've burst through an internal filter and there's less resistance for the oil to flow. The only benefit is I don't need to put timber preserve on beause they are practicaly soaked in oil. Any Ideas?