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    Raypak lonox heater not lighting and rusted base

    Trying to troubleshoot a Raypak r337a LNG lonox heater. It’s sparking and gas is turning on, but not lighting. I took the burner tray out and cleaned the orifices. Put it back together and it lit, but first start was pretty hard. It kept burning, but was lightly smoking out the top and it is...