I have a new Black and Decker 20v max string trimmer model lst201. When the trigger is engaged it cuts for about 6 inches then stops. The trigger then needs to be re-engaged. Any solutions?

SOURCE: Black and Decker Grass Hog Model #GH1000

the drive cable probley kinked or bent and does not drive the head the cable goes from the motor to the head take the clamp bolt out and lift the head off the cutter check the cable

SOURCE: Describe your Black & Decker Grasshog

The push lock on the string feeder Is sticking. Pull it off, clean it out and put it back on.

good luck

SOURCE: B & D auto feed string trimmer won't advance string

Is the string spool seated on the rachet correctly? If so and all is well, it is worth noting that these trimmers auto feed fuunction is problematic at best, requiring manually unwinding some line every few minutes as the unit gets older.

SOURCE: ENGINE WILL NOT ENGAGE WITH SPINNING SPOOL

I had the same problem, The pully is plastic and is mostlikely melted. I took mine apart when it finally stopped working and found that the belt had broken as well. When taking it apart, there is a hidden screw under the black sticker label. Just feel for the soft spot. Also, there are screws under the black plastic embelishments.

SOURCE: How to wind string around the bobbin

The manual is available on line if you do not have your hard copy OR you could purchase a spool already loaded and ready to go.