While you wait for answers, we may have found some information which could help you.
Click here for Black Decker StrimmerHow do I replace a broken drive belt on my electric Black & Decker Strimmer?
Drive belt?
Black & Decker GW250 leaf blower/vacuum Diagram?
Grass trimmer not working correctly?
Black & Decker GL540 trimmer nylon cord unravelling how can I fix that?
how to rewind the spool on black & decker strimmer gl720?