HAHA Sounds like my delema the other day. I wanted to shoot myself when i figured it out. All kinds of misfires and back firing so on and so on. Took the carbs apart to inspect them, took the float bowls off, took the rubber pilot plug out, then flipped the carbs over to look at the top. Pilot jets both fell out! LOL They were never screwed in, last time i rebuilt them i must have forgot....DUUUUUUHHHH.