Burnt my fuel line with first run also. Thank goodness there are zip-ties, which I used to hold fuel and vent lines away from muffler. I also use a plastic bottle to catch fuel from vent line when filling tank. This bottle has a nipple on the cap to which I attached some tygon tubing that has a small diameter plastic tube at its end. I insert the the small plastic tube end into the fully opened carb and squirt a liberal amount of gas into the carb and close the throttle after doing so.