The original cap was cracked on the internal portion, letting it leak out where the parts snap together (hexagon shape to round)Is it possible that all you need is a new oil tank cap? Cap washer might be dried out or broken or the cap could be cracked. Worth looking at. Screwdrivers tear apart Stihl caps. That's why I made one of these cap twisters in my shop:
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I'm glad you figured it out and hopefully it only puts oil where it's supposed to now.The original cap was cracked on the internal portion, letting it leak out where the parts snap together (hexagon shape to round)
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