So I’m working on a this saw for a friend and he says it leaks fuel. He borrowed it from his dad and after he used it was leaking fuel in his garage. I pick it up and find that yeah it definitely has a venting issue. So I play with the cap and with the cap slightly untight it doesn’t have any issues. I think I’ve found the problem. Then I emptied the premixed trufuel that he had added and added my mixed gas from the gas station. The saw then stopped having a venting problem all together. I called some local repair shops to see if they’ve seen this before and said no. Has anyone run into this before?