ORIGINAL: DavidAgar
There is a jam nut that has the spray bar assemble locked in place. You will need to loosen up the jam nut and the whole spray bar and needle valve will unscrew out. Install the new one by screwing in the new one. You will want to get the spray bar close to centered in the carb, then just tighten up the jam nut. This should not effect the break in off the engine at all. Good Luck, Dave
That's great help...but the only thing is that I don't know what all of that is...not sharp as I used to be on terminology

....so if you could give me more detailed instructions on this, I would REALLY REALLY appreciate it, and if it's it not too much trouble, maybe a diagram...because, I honestly thought that these things screwed in and screwed out!!