I had to replace the fuel lines on my weeteater XT200 but it still won't start. Replacing spark plug did not help. Any ideas?

Did it run before?
Sounds like (little tiny mesh screen in the carb) is clogged.. If its of some age... I'd rebuild the carb with gaskets and diapragm.

Yes it did run before (last year).
Do you know where I can find some more detailed drawings of the carb?

Thanks

For the carb, I have no clue really of where... what seems to work for most when tearing them down is take pictures along the way for reference. If you have a small engine shop around you (a good one) they should be glad to help you.