How can I fix my Homelite 26cs Lite trimmer?

Hateto say it, but my new homelite 26ss trimmer also won't start on it's own. There are two adjusting screws for the mix which are capped at the factory.
I don't know if they are capped or a special tool that I don't seem to have slips over them, so I am very reluctant to drill them out.
So I squirt a little carb cleaner in the carb area and what do ya know? It starts every time.
I am assuming that mixture is off, but I do not dare drill out the screws/caps

Les
May 2009