I have access to an analyzer and I have seen other boilers identical to mine on other jobs. But really all I want is a gas fired burner gun! I'll buy a new one if needed, but I'd rather buy one from a guy who pulled one from a job or has an extra one.
And the flange is the standard 3" size. Looking for a gun to fit in there for the conversion. It's getting cold and I can't go back to oil - the tank is too old and can't be changed since the house has been modified since the installation and there's no way to get the old tank out or get a new one in.