Arrived at location on 3/7/22 - Bottom pizza oven, pilot lit but burner would not light. Heated the mercury bulb with lighter, got it to fire off. Cleaned bulb. Adjusted pilot up higher. Cleaned pilot best could without taking chance of breaking bulb. Did not try to remove pilot or bulb. When do it breaks most of the time. Oven lit now. Working. If quits again will probably have to do the upgrade kit and new stat. Plus would replace the gas shut off valves that have vise grips on them now. Completed. Working at this time.