Ever had that moment of absolute clarity when you realize that you're an idiot? I had another one last night. Two separate pieces of equipment with the same problem. One is my C160 Auto with a K341, the other a Troybilt tiller with a K161. Fuel flowing out of the carbs. Typical needle and seat problems. Replaced the needles, seats, bowl gaskets and all is surgically clean, filters in place. Went through both carbs till I was beating my head on a rock. I know carbs. REALLY. For over 25 years I ran and even raced Honda SOHC 750's that had a rack of 4 carbs. The one and only thing I didn't check, you ask??? Are the floats holding fuel because they have a leak?? What are the odds? Two boat anchor floats. I haven't dealt with a bad float in 15 years. Wasn't on my radar. Moral of my ramblings, check everything. Now I gotta go out and hose my blood of the rock.
Mark.