I couldn't understand why suddenly my engine was blowing oil
My snowblower never used oil, but suddenly it was leaking out of the governor rod, 1/2 quart for each tank of gas, all Winter. I was ready to check the breather because I noticed the oil didn't go down the fill tube well and then I saw this. Follow the screwdriver to above the fuel bowl. A mud wasp nest inside the breather hose. First one for me. Much easier to clean than removing the breather cover.