Just scored one of these little beasts yesterday off of Craigslist.

Gave my old a** John Deere/Homelite S1400 (which was actually quite a good trimmer) to my little brother.

It starts first pull and runs excellent but I was not aware that the carb was not adjustable till I got it home and started cleaning everything on it. I mean not adjustable at all, no screws or anything!

Any ideas what thats all about and why, or if there is a different carb I could use on it that IS adjustable?